From: VOELS@usmv01.usm.uni-muenchen.de (Stephen A. Voels)
Subject: Help Decoding an Error Log Message
Organization: University Observatory Munich, FRG 
Date: Wed, 2 Sep 1992 13:11:54 GMT
X-News-Reader: VMS NEWS 1.20


     One of our disks has suddenly started generating a lot of errors of
the form given below.  This is not the normal (occasional) bad block error
I am useded to seeing in which the the block is replaced or declared good.
Instead, sometimes the same error is given over and over for the same
block.  In some cases, the error repeats so often, that the disk goes into
mount verfication, but is not able to verify the disk.

     Can someone tell me more from the error message below.  In particular
what the INVALID HEADER error means.

Thanks,

Stephen A. Voels

--------------------------------------------------------------------------------

 V A X / V M S               SYSTEM ERROR REPORT     COMPILED  2-SEP-1992 14:56
                                                                      PAGE   1.

 ******************************* ENTRY    9012. *******************************
 ERROR SEQUENCE 54.                              LOGGED ON:        SID 0A000004
 DATE/TIME  2-SEP-1992 14:40:03.65                            SYS_TYPE 01120102
 SCS NODE: USMV02                                              VAX/VMS V5.3

 TIME STAMP  KA650  CPU REV# 5.  FW REV# 1.2
 ************************************************************************

	2. INTERVENING RECORD(S) WILL BE PRINTED AT INPUT FILE "<EOF>"
 ******************************* ENTRY    9015. *******************************
 ERROR SEQUENCE 57.                              LOGGED ON:        SID 0A000004
 DATE/TIME  2-SEP-1992 14:50:03.65                            SYS_TYPE 01120102
 SCS NODE: USMV02                                              VAX/VMS V5.3

 TIME STAMP  KA650  CPU REV# 5.  FW REV# 1.2


	B E G I N I N G   O F   I N T E R V E N I N G   E N T R I E S
 V A X / V M S               SYSTEM ERROR REPORT     COMPILED  2-SEP-1992 14:56
                                                                      PAGE   2.

 ******************************* ENTRY    9014. *******************************
 ERROR SEQUENCE 56.                              LOGGED ON:        SID 0A000004
 DATE/TIME  2-SEP-1992 14:43:24.88                            SYS_TYPE 01120102
 SCS NODE: USMV02                                              VAX/VMS V5.3

 ERL$LOGMESSAGE ENTRY  KA650  CPU REV# 5.  FW REV# 1.2

 I/O SUB-SYSTEM, UNIT _USMV02$DUB0:
 
       MESSAGE TYPE        0001
                                       DISK MSCP MESSAGE
       MSLG$L_CMD_REF  483F0007
       MSLG$W_UNIT         0000
                                       UNIT #0.
       MSLG$W_SEQ_NUM      0000
                                       SEQUENCE #0.
       MSLG$B_FORMAT         02
                                       DISK TRANSFER ERROR
       MSLG$B_FLAGS          41
                                       SEQUENCE NUMBER RESET
                                       OPERATION CONTINUING
       MSLG$W_EVENT        0048
                                       DATA ERROR
                                       INVALID HEADER
       MSLG$Q_CNT_ID   10000800
                       01060000
                                       UNIQUE IDENTIFIER, 000010000800(X)
                                       MASS STORAGE CONTROLLER
                                       UDA50A
       MSLG$B_CNT_SVR        D5
                                       CONTROLLER SOFTWARE VERSION #213.
       MSLG$B_CNT_HVR        04
                                       CONTROLLER HARDWARE REVISION #4.
       MSLG$W_MULT_UNT     0000
       MSLG$Q_UNIT_ID  01000800
                       02050000
                                       UNIQUE IDENTIFIER, 000001000800(X)
                                       DISK CLASS DEVICE (166)
                                       RA81
       MSLG$B_UNIT_SVR       00
                                       UNIT SOFTWARE VERSION #0.
       MSLG$B_UNIT_HVR       00
                                       UNIT HARDWARE REVISION #0.
       MSLG$B_LEVEL          00
       MSLG$B_RETRY          01
       MSLG$L_VOL_SER  00000001
                                       VOLUME SERIAL #1.
       MSLG$L_HDR_CODE 000CA710
                                       LOGICAL BLOCK #829200.
                                       GOOD LOGICAL SECTOR
 ****** ENTRY 9013., ERROR SEQUENCE 55. LOGGED ON SID 0A000004

 ERL$LOGSTATUS ENTRY  KA650  CPU REV# 5.  FW REV# 1.2

 I/O SUB-SYSTEM, UNIT _USMV02$DUB0:
 
       MSLG$L_CMD_REF  483F0007

 V A X / V M S               SYSTEM ERROR REPORT     COMPILED  2-SEP-1992 14:56
                                                                      PAGE   3.

       ORB$L_OWNER     00010004
                                       OWNER UIC [001,004]
       UCB$L_CHAR      1C4D4108
                                       DIRECTORY STRUCTURED
                                       FILE ORIENTED
                                       SHARABLE
                                       AVAILABLE
                                       MOUNTED
                                       ERROR LOGGING
                                       CAPABLE OF INPUT
                                       CAPABLE OF OUTPUT
                                       RANDOM ACCESS
       UCB$L_OPCNT     000000AB
                                       171. QIO'S THIS UNIT
       UCB$W_ERRCNT        0001
                                       1. ERRORS THIS UNIT
       UCB$W_STS           1810
                                       ONLINE
                                       SOFTWARE VALID
                                       UNLOAD AT DISMOUNT
 
       CDRP$L_MEDIA    000CA6E5
                                       STARTING LBN #829157       CDRP$W_FUNC         000C
                                       READ PHYSICAL BLOCK
       CDRP$L_BCNT     00008000
                                       TRANSFER SIZE 32768. BYTE(S)
       CDRP$W_BOFF         0074
                                       116. BYTE PAGE OFFSET
       CDRP$L_PID      00010020
                                       REQUESTOR "PID"
       CDRP$Q_IOSB     00000000
                       010E001F        IOSB, 0. BYTE(S) TRANSFERRED
ANAL/ERROR/SINCE=2-SEP-1992 14:40:00.00/OUTPUT=TMP.TMP

--------------------------------------------------------------------------------


Stephen A. Voels
Uni.-Sternwarte Muenchen     Internet:  voels@usm.uni-muenchen.de
Scheinerstr. 1               Voice:     +49-89-92209437
8000 Muenchen 80  FRG        FAX:       +49-89-92209427
Newsgroups: comp.os.vms,comp.compression