Abstract:
The invention is directed to a storage device utilizing laptop storage drives and rackmount server adapted to use the same. The storage device includes a body and drive software. The drive and internal portions of the body are adapted to form contact fits. The software of the storage device provides an electronic interface that permits operations of advantageous RAID configurations.

Description:
FIELD OF THE INVENTION 
     The present invention relates to the field of variable electronic storage systems and more specifically to the field of Redundant Arrays of Independent Disks systems. 
     BACKGROUND 
     It is known how to store data in an array of disks managed by an array controller to control the storage and retrieval of data from the array is known. One example of such a system is a Redundant Array of Independent Disks (RAID) comprising a collection of multiple disks organized into a disk array managed by a common array controller. The array controller presents the array to the user as one or more virtual disks. Disk arrays are the framework to which RAID functionality is added in functional levels to produce cost-effective, high-performance disk systems having varying degrees of reliability based on the type of RAID architecture implemented. RAID architecture can be conceptualized in two dimensions as individual disks arranged in adjacent columns. Typically, each disk is partitioned with several identically sized data partitions known as stripes, or minor stripes. Distributed across the array of disks in rows, the identically sized partitioned strips form a data stripe across the entire array of disks. Therefore, the array contains stripes of data distributed as rows in the array, wherein each disk is partitioned into stripes of identically partitioned data and only one strip of data is associated with each stripe in the array. 
     As is known, RAID architectures have been standardized into several categories. RAID level 0 is a performance-oriented striped data mapping technique incorporating uniformly sized blocks of storage assigned in a regular sequence to all of the disks in the array. RAID level 1, also called mirroring, provides simplicity and a high level of data availability, but at a relatively high cost due to the redundancy of the disks. RAID level 3 adds redundant information in the form of parity data to a parallel accessed striped array, permitting regeneration and rebuilding of lost data in the event of a single-disk failure. RAID level 4 uses parity concentrated on a single disk to allow error correction in the event of a single disk failure, but the member disks in a RAID 4 array are independently accessible. In a RAID 5 implementation, parity data is distributed across some or all of the member disks in the array. The RAID 5 architecture achieves performance by striping data blocks among N disks, and achieves fault-tolerance by using 1/N of its storage for parity blocks, calculated by taking the exclusive-or (XOR) of all data blocks in the parity disks row. A RAID 6 architecture is similar to RAID 5, but RAID 6 can overcome the failure of any two disks by using an additional parity block for each row (for a storage loss of 2/N). In one example of a RAID 6 architecture, the first parity block (P) is calculated with XOR of the data blocks. The second parity block (Q) employs Reed-Solomon codes. One drawback of the known RAID 6 implementation is that it requires a complex and computationally time-consuming array controller to implement the Reed-Solomon codes necessary to recover from a two-disk failure. The complexity of Reed-Solomon codes may preclude the use of such codes in software, or may necessitate the use of expensive special purpose hardware. Thus, implementation of Reed-Solomon codes in a disk array increases the cost, complexity, and processing time of the array. 
     SUMMARY 
     The invention is directed to a storage device having a body, drive software, and an interface. The body includes at least two interior drive slots with an internal support member. Multiple laptop storage drives having a girth of less than 2.5 includes fit within each slot. The drives include an external drive fit member adapted to form a contact fit relationship with the internal support member. The body includes a drive door for each drive adapted to fit within the body. The software provides an electronic interface that permits operations of RAID 0, RAID 1, non-RAID, and combinations thereof. The body includes a physical interface that includes, and preferably consists of, a power indicator. 
     Another embodiment of the storage device includes a body with a single interior slot with at least four of the laptop storage drives of girth less than 2.5 inches in a storage drive array The drives include an external drive fit member adapted to form a contact fit relationship with the internal support member. The body includes a drive door for each drive adapted to fit within the body. The software provides an electronic interface that permits operations of RAID 0, RAID 1, RAID 5, and combinations thereof. The body includes a physical interface that includes, and preferably consists of, a power indicator. 
     The present invention further includes rackmount servers adapted to accept the storage devices, and a system that includes a computer in electronics communication with the storage devices directly or via a rackmount server. 
     These aspects of the invention are not meant to be exclusive. Furthermore, some features may apply to certain versions of the invention, but not others. Other features, aspects, and advantages of the present invention will be readily apparent to those of ordinary skill in the art when read in conjunction with the following description, and accompanying drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view of the device of the present invention. 
         FIG. 2  is a perspective view of the device of the present invention. 
         FIG. 3  is a perspective view of the server of the present invention. 
         FIG. 4  is a plan view of the device of the present invention. 
         FIG. 5  is a perspective view of the device of the present invention. 
         FIG. 6  is a perspective view of the device of the present invention. 
         FIG. 7  is a perspective view of the server of the present invention. 
         FIG. 8  is a view of the process of the present invention. 
         FIG. 9  is a view of the system of the present invention. 
         FIGS. 10A-10D  are cutaway, partial views of the device of the present invention. 
     
    
    
     DETAILED DESCRIPTION 
     Referring first to  FIG. 1  and  FIG. 8 , a basic embodiment of the storage device  100  and variable storage process  200  are shown. The device  100  preferable includes two or more 2.5″ formatted SATA hard drives  102 . The drives  102  are removably positioned within drive slots  104  dimensioned to accept the drives  102  within the device body  106 . The drive slots  104  may occupy any position, but a preferred position places one drive on top of another as is shown by  FIG. 5 . Each slot,  104 , can only accept one hard drive. It is preferred that the two slots  104  are separated by a thin sheet of metal as depicted in  FIG. 10D . The preferred slot includes internal body fit members as support means. By body fit members, it is meant that rather than rely on quasi-permanent means of component attachment that requires actuating of distinct attachment accessories, e.g. bolts and screws, the present invention utilizes components that rely on contact to secure two components. 
     Turning now to  FIGS. 10A-10D , the preferred body fit members  190  within the drive slots  104  include siderails or some other internal support means  192  that position the drive slot in a position proximate to the drive so as to provide fit support. The drive slot may include a single continuous opening that utilizes the body fit members to form any desired physical partitions. The internal body fit member of the device may include a body shelf, siderails, a door shelf, snaps, grooves, etc. The external drive fit members  194  may include a drive  102  with a body having dimensions to releasably mate with the internal body fit members of the device. The fittings may form a rest fit relationship such that the drive merely rests upon a body fit member. The fittings may form a close fit relationship, such that a close sizing between a portion of the drive or component thereof and the body slot or a component thereof forms a near fit. By near fit, it is meant that a distance between two components is highly minimized to a substantial degree dictated by the natural size tolerances between two components. The fittings may form an interference fit, such that one component includes a size adapted to require pressure to fit within a second component and upon fitting requires substantial pressure for removal. The fit members serve as a means of support in addition to the natural support provided by any internal data couplings  196  within the device body, e.g. eSATA ports. Returning to  FIG. 1 , a user need only open the slot door  108  to access the disk  102  for removal. 
     Turning now to  FIG. 2 , there are preferably three connections, located on the rear of the body. The connections include two data connections, including a USB 2.0 port  110  and an eSATA 3.0 Gb/s port  112 . When the device is used via the USB Port, the drives will not be capable of removal during operation; when the device is used with the eSATA port, the drives will be capable of removal during operation. Additionally, the device  100  includes a direct current port  114 . The body  106  preferably includes venting  116  to permit the emission of heat. 
     With reference to  FIGS. 8 and 9 , the setup and configuration of the system  500 , which includes device(s)  100 , the supporting computer  300  in communication with the device(s)  100 , and potentially one or more rackmount servers bearing the devices  100  will by performed via software  600  loaded onto the computer  300  that connects to the device directly or through a rackmount server. The process  200  of the present invention includes recognition and configuration of the device. Upon insertion of a new hard drive in either the primary or ancillary slot, the device  100  will remain dormant  202 ,  204  and take no action. For the purposes of the present disclosure, the primary disk shall refer to the base drive positioned in the device, whereas the ancillary drive shall refer to any other number of drives described either by their relationship to either the primary drive or another ancillary drive. Each drive includes drive software  700  having a recognition token that includes two parameters: a recognition parameter identifies the drive as capable of use with the present invention, and an action parameter that includes an action request. The preferred action request includes instructions to remain dormant until instructions from the software are accepted. An alternative action request includes immediate configuration by the computer without user interaction. The recognition token is recognized by software within a computer adapted to seek the recognition token actively. The computer  300  informs the user of the existence of a new drive  206 ,  208  and requests an initiation action  210 ,  212  for the drive. Specifically, the computer provides a two-pronged decision to the user as to whether s/he would prefer operation of the device as a RAID 0 configuration  218 , a RAID 1 configuration  220 , or operate as a dual hard drive  216 . Other forms of the present invention my present other raid options, such as RAID 5. 
     Turning now to  FIGS. 3 and 4 , the present invention further includes a rackmount server  400  bearing multiple storage devices  100 . The server  400  includes a server body  402  with multiple device slots  410  dimensioned to accept the storage devices  100 . The embodiment of the storage device  100  adapted for use with the rackmount server  400  includes direct current contact points  124  rather than use of a direct current plug outlet. The preferred rackmount server  400  includes an optical drive  406  and multiple 2.5″ SATA hard drives for the operation of the server itself. Any drive  102  within the rackmount server  400  may be removed and still be capable of backing up any number of servers on a local area network. The software that that operates the device  100  is the same software that operates the server  400 , and preferably includes functions such that the only physical interface required upon the drive or rackmount server body is a power indicator  404 . The server  400  operates a server operating system and backup software. 
     Turning now to  FIGS. 5-7 , the present invention further includes a quad-drive embodiment of the device  100  and an embodiment of the rackmount server  400  adapted to internally support multiple quad-drive devices  100 . The quad-drive may include either direct current contacts for positioning within the rackmount server  400  or a direct current plug outlet. It is preferred that the server  400  include a rechargeable power source. The preferred operation utilizes the quad-drive embodiment of the device  100  and the server  400  adapted therefor to be software configurable only. Both the device  100  and server run in RAID 5 mode only. Furthermore, the server  400  must possess at least three drives  102  therein to be configured for operation. Any other drive  102  may be part of the RAID 5 or can be a “hot spare.” 
     Although the present invention has been described in considerable detail with reference to certain preferred versions thereof, other versions would be readily apparent to those of ordinary skill in the art. Therefore, the spirit and scope of the appended claims should not be limited to the description of the preferred versions contained herein.