Abstract:
A mis-configuration detection method for a blade system. A blade system comprising a plurality of blade servers, a first Input/Output (I/O) module, a second I/O module, and a management module is provided, each blade server comprising a daughter card (DC). The management module determines a first candidate I/O type according to a DC type and activates the blade servers, or executes DC mis-configuration operations, determines a second candidate I/O type according to the DC type and activates the first I/O module, or executes an I/O mis-configuration operation, and activates the second I/O module according to the type of the first I/O module, or executes I/O mis-configuration operations.

Description:
BACKGROUND 
   The invention relates to detection methods, and more particularly, to mis-configuration detection methods for blade systems. 
   Integration of internal servers in a central location reduces problems and costs associated with distributed small-scale servers. 
   Currently, entity integration has replaced pedestal servers with single rack unit (RU) or double RU servers, saving space and easing administration. Each server requires independent components, such as power supply cables, Ethernet interfaces, system management, power supplies, keyboard/video/mouse (KVM) interfaces, optical fiber interfaces, and others. When a 42U height cabinet is filled with servers, a numerous cables are required therein such that problems may not be rapidly solved and server installation and replacement inconvenience. Additionally, multiple occupy independent power supplies and converter units occupy major space. 
   To solve the above-described problems, blade systems have been disclosed. Unlike pedestal or rack mount servers, the volume of each installed blade server is much smaller, despite comprising a central processing unit (CPU), a hard disk drive (HDD), memory, network interfaces, control chips, and others, as a pedestal or rack mount server. Further, each blade server acts as an interface card in a personal computer, juxtaposed in a blade system.  FIG. 1  is schematic view of a blade system. Blade system  100  comprises multiple (ten, here) parallel blade servers  110 . Blade servers  110 , remotely monitored by a management module  150 , share a power supply  120 , a fan  130 , a switch  140 , a mouse (not shown), a keyboard (not shown), and a display device (not shown). 
   Generally, each blade server comprises four I/O bays, each comprising an I/O module for networking. Additionally, each blade server comprises a daughter card (DC)  115  for connection to the I/O module. When different types of DCs are installed or the DC type for blade servers is different from the I/O module type, the blade servers or I/O module cannot effectively operate. 
   Thus, a mis-configuration detection method for blade systems is required, generating notification to avoid erroneous DC types for I/O modules and blade servers. 
   SUMMARY 
   Mis-configuration detection methods for blade systems are provided. In an embodiment of such a method, a blade system, comprising a plurality of blade servers, a first Input/Output (I/O) module, a second I/O module, and a first management module, is provided. Each blade server comprises a daughter card (DC). When the blade system is activated, the first management module determines whether installed DC types are the same. If so, the first management module designates the DC type a first candidate I/O type and activates the blade servers, and, if not, executes DC mis-configuration operations. The first management module determines whether the first I/O module type is identical to the first candidate I/O type, and, if so, designates the first I/O module type a second candidate I/O type and activates the first I/O module, and, if not, executes I/O module mis-configuration operations. 
   Further, the first management module determines whether the second I/O module type is identical to the second candidate I/O type, and, if so, activates the second I/O module, and, if not, executes I/O module mis-configuration operations. 
   Further, when the blade servers are inactive, the first management module determines whether each DC type is the same, and, if so, designates the DC type a third candidate I/O type and activates the blade servers, and, if not, executes chassis mis-configuration operations. The first management module determines whether the first I/O module type is identical to the third candidate I/O type, and, if so, designates the first I/O module type a fourth candidate I/O type and activates the first I/O module, and, if not, executes I/O module mis-configuration operations. 
   Also disclosed is another mis-configuration detection method for blade systems. In an embodiment of such a method, a blade system, comprising a first slot, a second slot, and blade servers not comprising DCs, is provided. No I/O module is inserted in the first and second slots. When a first I/O module is inserted in the first slot, the first I/O module type is designated as a first candidate I/O type and the first I/O module is activated. 
   Further, when a second I/O module is inserted in the second slot and no I/O module is inserted in the first slot, I/O module mis-configuration operations are executed. 
   Further, when a blade server comprising a DC is installed on the blade server, the DC type is designated as a second candidate I/O type and the blade server is activated. 
   Further disclosed is another mis-configuration detection method for blade systems. In an embodiment of such a method, a blade system, comprising a plurality of blade servers comprising different types of DCs, is provided, and chassis mis-configuration is detected. An I/O module is inserted in the blade system and the I/O module type is designated as a candidate I/O type. The I/O module is activated. It is determined whether the I/O module type is identical to one DC type, and, if so, blade servers comprising DCs with the types identical to the I/O module type are activated, and, if not, the chassis mis-configuration is detected. 
   Mis-configuration detection devices for blade systems are provided. An embodiment of such a device comprises a plurality of blade servers, a first I/O module, a second I/O module and a first management module, each blade server comprising a DC. When an initial operation is implemented, the first management module determines whether each installed DC type is the same, and, if so, designates the DC type a first candidate I/O type and activates the blade servers, and, if not, executes DC mis-configuration operations. The first management module then determines whether the first I/O module type is identical to the first candidate I/O type, and, if so, designates the first I/O module type a second candidate I/O type and activates the first I/O module, and, if not, executes I/O module mis-configuration operations. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
     The invention can be more fully understood by reading the subsequent detailed description and examples of embodiments thereof with reference made to the accompanying drawings, wherein: 
       FIG. 1  is a schematic view of a blade system; 
       FIG. 2  is a schematic view of an embodiment of the architecture of a blade system; 
       FIGS. 3A and 3B  are flowcharts of an embodiment of a mis-configuration detection method for blade systems; 
       FIG. 4  is a schematic view of another embodiment of a mis-configuration detection method for blade systems; and 
       FIG. 5  is a schematic view of a further embodiment of a mis-configuration detection method for blade systems. 
   

   DETAILED DESCRIPTION 
   The invention discloses a mis-configuration detection method and device for blade systems. 
     FIG. 2  is a schematic view of an embodiment of the architecture of a blade system. Blade system  200  comprises four I/O bays  211 ˜ 214 , a master baseboard management controller (BMC)  221 , a slave BMC  222 , a KVM module  230  and multiple blade servers (not shown). An I/O module for networking can be inserted in each of I/O bays  211 ˜ 214 . 
   In this embodiment, an I/O module is a Gigabit Ethernet (GbE) switch (SW) module, a Fiber Channel Pass Through (FC-PT) module, a Dell Power Connect GbE module, a Dell Physical (PHY) module, a Fiber Channel Switch (FC-SW) module, or an Infinite Band Pass Through (IB-PT) module. 
   Hardware or software components can comprises BMCs, DCs, Fiber Channel (FC) modules, Field Replaceable Units (FRU), KVM interfaces, modular management blades (MMB), and PHY networking devices. 
   A BMC installed on a server blade provides intelligent platform management interfaces (IPMI), capable of embedded function, multiple interfaces, and considerable general purpose I/O (GPIO) pins. 
   A DC acts as a protocol control information (PCI) card installed on a pedestal or rack mount server, installed on a blade server, providing PCI-X or PCI-Express function. 
   An FC module, operating at 2.215 gigabits/sec, is a data transmission interface supporting multiple transmission protocols, comprising interface protocol (IP) and small computer system interface (SCSI), capable of integration with high-speed I/O and networking of single connection. FC is an open standard, defined in American National Standards Institute (ANSI) and Open System Interconnection (OSI); standards, applicable to copper and fiber transmission with an available distance of 10 kilometers. 
   An FRU is a removable or replaceable hardware component, such as electrically erasable programmable read only memory (EEPROM). Typical switch FRUs record switch typs, product names, and media access control (MAC). Chassis FRUs record chassis or MMB configuration. 
   A KVM module controls through a PS2 keyboard and mouse and VGA signals. Output for controlled blade servers is switched to a KVM circuit board and an MMB controls and manages the blade servers using corresponding KVM control circuits. 
   An MMB manages blades and chassis and provides an embedded network server and services for management. 
   A PHY networking device is an Ethernet transmissive module, routing data signals from blade servers to an external networking device. The transmissive module connects to blade servers one-to-one, or a single RU server to an external network device. 
   A mis-configuration detection method for blade systems of the invention comprises a two-phase process, first powering on the chassis with direct current and MMB activation or state change from master to slave. The second phase comprises removal or insertion of I/O modules, removing blade servers comprising DCs, and inserting blade servers not comprising any DCs. 
   Next, DC types and I/O module types are defined according to the described network modules, as follows. 
   Type 1: GbE Module 
   
     
       
             
             
             
           
             
             
             
             
           
         
             
                 
                 
             
             
                 
               Learning 
               Type 
             
             
                 
                 
             
           
           
             
                 
             
           
        
         
             
                 
               Candidate I/O Type 
               Learn from blade with DC 
               Gbe 
             
             
                 
               I/O Fabric Type 
               Learn from blade with DC 
               Gbe 
             
             
                 
               Model of I/O 
               Not Yet 
               Unknown 
             
             
                 
               Module 
             
             
                 
                 
             
           
        
       
     
   
   Type 2: GbE-SW-Module 
   
     
       
             
             
             
           
             
             
             
             
           
         
             
                 
                 
             
             
                 
               Learning 
               Type 
             
             
                 
                 
             
           
           
             
                 
             
           
        
         
             
                 
               Candidate I/O Type 
               Learn from blade with 
               Gbe-SW 
             
             
                 
                 
               I/O module 
             
             
                 
               I/O Fabric Type 
               Learn from blade with 
               Gbe 
             
             
                 
                 
               I/O module 
             
             
                 
               Model of I/O Module 
               Learn from blade with 
               SW 
             
             
                 
                 
               I/O module 
             
             
                 
                 
             
           
        
       
     
   
   Type 3: GbE-PHY Module 
   
     
       
             
             
             
             
           
         
             
                 
                 
             
             
                 
                 
               Learning 
               Type 
             
             
                 
                 
             
           
           
             
                 
               Candidate I/O Type 
               Learn from blade with 
               Gbe-SW 
             
             
                 
                 
               I/O module 
             
             
                 
               I/O Fabric Type 
               Learn from blade with 
               Gbe 
             
             
                 
                 
               I/O module 
             
             
                 
               Model of I/O Module 
               Learn from blade with 
               SW 
             
             
                 
                 
               I/O module 
             
             
                 
                 
             
           
        
       
     
   
   Type 4: FC Module 
   
     
       
             
             
             
           
             
             
             
             
           
         
             
                 
                 
             
             
                 
               Learning 
               Type 
             
             
                 
                 
             
           
           
             
                 
             
           
        
         
             
                 
               Candidate I/O Type 
               Learn from blade with DC 
               FC 
             
             
                 
               I/O Fabric Type 
               Learn from blade with DC 
               FC 
             
             
                 
               Model of I/O 
               Not Yet 
               Unknown 
             
             
                 
               Module 
             
             
                 
                 
             
           
        
       
     
   
   Type 5: FC-SW Module 
   
     
       
             
             
             
           
             
             
             
             
           
         
             
                 
                 
             
             
                 
               Learning 
               Type 
             
             
                 
                 
             
           
           
             
                 
             
           
        
         
             
                 
               Candidate I/O Type 
               Learn from blade with 
               FC-SW 
             
             
                 
                 
               I/O module 
             
             
                 
               I/O Fabric Type 
               Learn from blade with 
               FC 
             
             
                 
                 
               I/O module 
             
             
                 
               Model of I/O Module 
               Learn from blade with 
               SW 
             
             
                 
                 
               I/O module 
             
             
                 
                 
             
           
        
       
     
   
   Type 6: FC-PT Module 
   
     
       
             
             
             
           
             
             
             
             
           
         
             
                 
                 
             
             
                 
               Learning 
               Type 
             
             
                 
                 
             
           
           
             
                 
             
           
        
         
             
                 
               Candidate I/O Type 
               Learn from blade with 
               FC-PT 
             
             
                 
                 
               I/O module 
             
             
                 
               I/O Fabric Type 
               Learn from blade with 
               FC 
             
             
                 
                 
               I/O module 
             
             
                 
               Model of I/O Module 
               Learn from blade with 
               PT 
             
             
                 
                 
               I/O module 
             
             
                 
                 
             
           
        
       
     
   
   Type 7: IB Module 
   
     
       
             
             
             
           
             
             
             
             
           
         
             
                 
                 
             
             
                 
               Learning 
               Type 
             
             
                 
                 
             
           
           
             
                 
             
           
        
         
             
                 
               Candidate I/O Type 
               Learn from blade with DC 
               IB 
             
             
                 
               I/O Fabric Type 
               Learn from blade with DC 
               IB 
             
             
                 
               Model of I/O 
               Not Yet 
               Unknown 
             
             
                 
               Module 
             
             
                 
                 
             
           
        
       
     
   
   Type 8: IB-SW Module 
   
     
       
             
             
             
           
             
             
             
             
           
         
             
                 
                 
             
             
                 
               Learning 
               Type 
             
             
                 
                 
             
           
           
             
                 
             
           
        
         
             
                 
               Candidate I/O Type 
               Learn from blade with 
               IB-SW 
             
             
                 
                 
               I/O module 
             
             
                 
               I/O Fabric Type 
               Learn from blade with 
               IB 
             
             
                 
                 
               I/O module 
             
             
                 
               Model of I/O Module 
               Learn from blade with 
               SW 
             
             
                 
                 
               I/O module 
             
             
                 
                 
             
           
        
       
     
   
   Type 9: IB-PT Module 
   
     
       
             
             
             
           
             
             
             
             
           
         
             
                 
                 
             
             
                 
               Learning 
               Type 
             
             
                 
                 
             
           
           
             
                 
             
           
        
         
             
                 
               Candidate I/O Type 
               Learn from blade with 
               IB-PT 
             
             
                 
                 
               I/O module 
             
             
                 
               I/O Fabric Type 
               Learn from blade with 
               IB 
             
             
                 
                 
               I/O module 
             
             
                 
               Model of I/O Module 
               Learn from blade with 
               PT 
             
             
                 
                 
               I/O module 
             
             
                 
                 
             
           
        
       
     
   
   Mis-configuration operations correspond to I/O module mis-configuration, DC mis-configuration, or chassis mis-configuration. I/O module mis-configuration operations comprise unallowable activation for the I/O modules, blinking pilot lamp (LED) for the I/O modules, blinking pilot lamp (LED) for chassis of the blade servers, and generation of MMB logs. DC mis-configuration operations comprise unallowable activation for the blade servers, blinking pilot lamp (LED) for the blade servers, generation of MMB logs, and blinking. KVM pilot lamp (LED) du ring activation for the blade servers and generation of error messages. Chassis mis-configuration operations comprise blinking pilot tamp (LED) for chassis of the blade servers and implementation of DC mis-configuration operations for all blade servers comprising a DC. 
   A mis-configuration detection method for blade systems is implemented according to definitions and mis-configuration types. 
     FIGS. 3A and 3B  are flowcharts of an embodiment of a mis-configuration detection method for blade systems. 
   Referring to  FIG. 3A , when a blade system is powered on, a MMB executes initial processes, waiting for 30 seconds to confirm that all I/O modules and blade servers are initialized (step S 11 ). Information is obtained during the initial processes, comprising I/O module type information obtained by FRU, power consumption information obtained from the Intelligent Platform Management Bus (IPMB), and DC information for all blade servers obtained from IPMB. Additionally, when the MMB (master) is re-activated (i.e. the blade system re-activated) or changes to the slave state (i.e. the master MMB failing due to damages or other causes), step S 11  is executed. 
   Next, it is determined whether blade servers comprising DCs are activated (step S 12 ), and; if so, the process goes to step S 13 , and, if not, to step S 22  (as shown in  FIG. 3B ). When all blade servers comprising DCs are activated, information of the DC type thereof (such as Gbe, FC, or TB) is obtained and the DC type is designated as a candidate I/O type. Next, it is sequentially determined, from the first position, whether the types of DCs installed on all blade servers are the same (step S 13 ). When a different type of DC is installed, DC mis-configuration is detected (step S 14 ), and DC mis-configuration operations are implemented. When all DCs are the same type, all blade servers are activated (step S 15 ). 
   Next, it is determined whether the type of an I/O module inserted in a specified slot (slot  3 , for example) is identical to the DC type (step S 16 ). If not, I/O module mis-configuration is detected (step S 17 ), and I/O module mis-configuration operations are implemented. If so, information of the I/O module type (such as GbE-SW, FC-PT, or IB-PT) is obtained and designated a candidate. I/O type, and the I/O module inserted in slot  3  is activated (step S 18 ). Next, it is determined whether the type of the I/O module inserted in slot  3  is identical to that inserted in slot  4  (step S 19 ). If not, I/O module mis-configuration is detected (step S 20 ), and I/O module mis-configuration operations are implemented. If so, the I/O module inserted in slot  4  is activated (step S 21 ). 
   Referring to  FIG. 3B , when blade servers comprising DCs are not activated, it is determined whether the types of DCs installed on blade servers are the same (step S 22 ). When a different type of DC is detected, chassis mis-configuration is detected (step S 23 ), and chassis mis-configuration operations are implemented. When all DCs are the same type, information of DC type thereof (such as Gbe, FC, or IB) is obtained and the DC type is designated as a candidate I/O type, and the blade servers are activated (step S 24 ). Next, it is determined whether the type of an I/O module inserted in a specified slot (slot  3 , for example) is identical to the DC type (step S 25 ). If not, I/O module mis-configuration is detected (step S 26 ), and I/O module mis-configuration operations are implemented. If so, information of the I/O module type (such as GbE-SW, FC-PT, or IB-PT) is obtained and designated a candidate I/O type, and the I/O module inserted in slot  3  is activated (step S 27 ). Next, it is determined whether the type of the I/O module inserted in slot  3  is identical to that inserted in slot  4  (step S 28 ). If not, I/O module mis-configuration is detected (step S 29 ), and I/O module mis-configuration operations are implemented. If so, the I/O module inserted in slot  4  is activated (step S 30 ). 
   Additionally, if no I/O module is inserted in slot  3  and an I/O module is inserted in slot  4 , the I/O module cannot be activated regardless of the I/O module type. If the type of the I/O module inserted in slot  4  is not identical to the DC type, I/O module mis-configuration is detected, and I/O module mis-configuration operations are implemented. 
   Additionally, in the blade system, if all blade servers comprising DCs are activated and no I/O module is inserted in slots  3  and  4 , processes are implemented as follows. If the types of all DCs installed on blade servers are the same, information of the DC type thereof is obtained and the DC type is designated as a candidate I/O type, and steps S 11 ˜S 30  are then implemented. If no blade servers comprise any DCs, information of the DC type cannot be obtained, and the candidate I/O type is defined as “unknown”. If different types of DCs are installed, chassis mis-configuration is detected, and chassis mis-configuration operations are implemented, as shown in  FIG. 3A . 
     FIG. 4  is a schematic view of another embodiment of a mis-configuration detection method for blade systems. 
   Initial states for a blade system are described. The blade system does not comprise blade servers comprising DCs and no I/O module is inserted in slot  1  or  3  (step S 31 ). When an I/O module: is inserted in slot  1  or  3  (step S 32 ), information of I/O module type (such as GbE-SW, FC-PT, or IB-PT) is obtained and the I/O module type is designated as a candidate I/O type, and the I/O module inserted in slot  1  or  3  is activated (step S 33 ). When an I/O module is inserted in slot  2  or  4  (step S 34 ), and no I/O module is inserted in slot  1  or  3 , I/O module mis-configuration is detected (step S 35 ), and I/O module mis-configuration operations are implemented. If a blade server comprising a DC is installed (step S 36 ), information of the DC type (such as Gbe, FC, or IB) is obtained, the DC type is designated as a candidate I/O type, and the blade server is activated (step S 37 ). 
     FIG. 5  is a schematic view of a further embodiment of a mis-configuration detection method for blade systems. 
   Initial states for a blade system are described. The blade system comprises blade servers comprising different types of DCs, chassis mis-configuration is detected and the candidate I/O type is “unknown”, and no I/O module is inserted in each slot (step S 41 ). When an I/O module is inserted in slot  3  (step S 42 ), information of the I/O module type (such as GbE-SW, FC-PT, or IB-PT) is obtained and the I/O module is activated (step S 43 ). Next, it is determined whether the type of the I/O module inserted in slot  3  is identical to the type of an installed DC (step S 44 ). If not, chassis mis-configuration is detected (step S 45 ). If so, blade servers comprising DCs with the same type to the I/O module type are activated (step S 46 ), and others occur DC mis-configuration. 
   Based on the flowcharts shown in  FIGS. 4 and 5 , corresponding operations are described according to limited conditions. 
   In default setting  1 , no DC is installed on each blade server and no I/O module is inserted in slot  1  or  3 , the candidate I/O type is “unknown” and no mis-configuration is detected. 
   If no I/O module is inserted in slot  2  or  4 , I/O module mis-configuration is detected when an I/O module is inserted in slot  2  or  4 , and I/O module mis-configuration operations are implemented. 
   If an I/O module is inserted in slot  1  or  3 , the I/O module type is designated as a candidate I/O type. 
   If a blade server comprising a DC is inserted in the blade system, the DC type is designated as a candidate I/O type. 
   In default setting  2 , blade servers comprising different types of DCs are inserted in the blade system and no I/O module is inserted in slot  1  or  3 , the candidate I/O type is “unknown” and chassis mis-configuration is detected. 
   If a blade server comprising a DC is removed, others comprising the same DC type, the DC type is designated as a candidate I/O type, no chassis mis-configuration is detected, and the existing blade servers are activated. 
   If a blade server comprising a DC is removed, when a blade server comprising a different DC type, chassis mis-configuration is detected. 
   If an I/O module is inserted in slot  1  or  3 , the I/O module type is designated as a candidate I/O type and the I/O module is activated. Blade servers comprising the DC type identical to the candidate I/O type are activated and others remain chassis mis-configuration. 
   In default setting  3 , the blade system comprises blade servers comprising the same DC type which is designated as a candidate I/O type, and no I/O module is installed on slots  1 ˜ 4 . 
   If an I/O module with the same type to the candidate I/O type is inserted in slot  1  or  3 , the I/O module type is designated as a candidate I/O type. 
   If an I/O module is inserted in slot  2  or  4  and no I/O module is inserted in slot  1  or  3 , I/O module mis-configuration is detected regardless of the I/O module type, and I/O module mis-configuration operations are implemented. 
   If a blade server comprising a DC is removed from the blade system with no blade server installed thereon, the candidate I/O type is classed as “unknown”. 
   If a blade server comprising a DC is removed from the blade system with others existing therein, the candidate I/O type is detected. 
   If a blade server comprising a DC (the type thereof designated a candidate I/O type) is removed from the blade system with another blade servers comprising the same types of DCs not identical to the candidate I/O type, the DC type is designated as a candidate I/O type. 
   If a blade server comprising a DC (the type thereof designated a candidate I/O type) is removed from the blade system with all other blade servers comprising different types of DCs, chassis mis-configuration, is detected and the candidate I/O type is classed as “unknown”. 
   If a blade server comprising a different type of DC not identical to the candidate I/O type, DC mis-configuration is detected and DC mis-configuration operations are implemented. 
   In default setting  4 , an I/O module is inserted in slot  3  and the I/O module is designated as a candidate I/O type. 
   If I/O modules are simultaneously inserted in slots  1  and  2  ( 3  and  4 ) and no chassis mis-configuration is detected, the candidate I/O type is detected when I/O modules are removed. 
   If I/O modules are simultaneously inserted in slots  1  and  2  ( 3  and  4 ) and chassis mis-configuration corresponding to one I/O module is detected, the other is removed. 
   Thus, if the blade system comprises blade servers comprising DCs and activated, the DC type is designated as a candidate I/O type. Further, if the type of an I/O module inserted in slot  3  is identical to the candidate I/O type, the I/O module type is designated as a candidate I/O type. Further, if the type of the I/O module inserted in slot  3  is different from the candidate I/O type, the candidate I/O type is detected. Further, if an I/O module is inserted in slot  4  with none inserted in slot  3 , I/O module mis-configuration is detected regardless of the I/O module type, and candidate I/O type is detected. 
   Based on the described conditions, if the blade system comprises blade servers comprising different types of DCs and inactivated, chassis mis-configuration is detected and the candidate I/O type is classed as “unknown”. 
   Based on the described conditions, if the blade system comprises blade servers comprising the same types of DCs with the DC type not identical to the candidate I/O type, the DC type is re-designated a new candidate I/O type. 
   Based on the described conditions, the blade system does not comprise any blade servers comprising DCs. Further, if an I/O module is inserted in slot  3 , the I/O module type is designated as a candidate I/O type. Further, if an I/O module is inserted in slot  4  with no I/O module inserted in slot  3 , I/O module mis-configuration is detected and the is classed as “unknown”. Further, if an I/O module is inserted in slot  1  or  2  ( 3  or  4 ) and no I/O&#39;module mis-configuration is detected, the inserted I/O module is removed. 
   Based on the described conditions, if an I/O module is inserted in slot  1  or  2  ( 3  or  4 ) and no I/O module mis-configuration is detected, the inserted I/O module is removed, and, if the blade system comprises blade servers comprising different types of DCs and inactivated, chassis mis-configuration is detected and the candidate I/O type is, detected. 
   Based on the described conditions, if an I/O module is inserted in slot  1  or  2  ( 3  or  4 ), the inserted I/O module is removed, and, if the blade system comprises blade servers comprising the same types of DCs with the DC type not identical to the candidate I/O type, the DC type is re-designated a candidate I/O type. 
   Based on the described conditions, if an I/O module is inserted in slot  1  or  2  ( 3  or  4 ), the inserted I/O module is removed, and, if no blade server comprising DCs is installed, the candidate I/O type is classed as “unknown”. 
   Based on the described conditions, if an I/O module is inserted in slot  1  or  2  ( 3  or  4 ), an I/O module with the I/O module type not identical to the candidate I/O type is inserted, such that I/O module mis-configuration is detected and I/O module mis-configuration operations are implemented. 
   Based on the described conditions, if a blade server comprising a DC with the DC type not identical to the candidate I/O type, DC mis-configuration is detected and DC mis-configuration operations are implemented. 
   A mis-configuration detection method for blade systems of the invention prevent installation of DCs with the DC type not identical to the I/O module type or installation of different types of DCs on blade servers. The method generates notification when erroneous DC or I/O modules are applied, and corresponding controls are implemented. 
   Although the present invention has been described in terms of preferred embodiment, it is not intended to limit the invention thereto. Those skilled in the technology can still make various alterations and modifications without departing from the scope and spirit of this invention. Therefore, the scope of the present invention shall be defined and protected by the following claims and their equivalents.