From: system@surf.eng.yale.edu
Subject: Disk Problems...
Organization: Yale University, Dept. of EE
Date: 12 Apr 92 14:52:05 EST

Help!
    Recently upon doing a analyze /rep/dis on my system drive (a RZ24 on a
VaxStation 3100, M38), I received the following error:

$  analyze /dis/rep dka300:
%ANALDISK-W-READBOOT, error reading boot block, RVN 1
-SYSTEM-F-PARITY, parity error

Does this mean that the RZ24 is bad, or might this go away if the device is
re-initialized?  Also, do I trust a standalone backup of a device acting like
this, or is it best to drop back 3 months in backup tape time?  Can whatever
file that sits at the boot block be copied there somehow from another 5.5
system if it has been corupted?
					-J. Sleight
					(sleight@venus.ycc.yale.edu)

(Error log entry follows that occurred at the time of the analyze)

 ******************************* ENTRY    1052. *******************************
 ERROR SEQUENCE 1014.                            LOGGED ON:        SID 0A000005
 DATE/TIME 12-APR-1992 14:03:55.86                            SYS_TYPE 04010002
 SYSTEM UPTIME: 4 DAYS 17:14:26
 SCS NODE:                                                     VAX/VMS A5.5

 DEVICE ERROR  KA420  CPU FW REV# 6.

 RZ24 SUB-SYSTEM, UNIT _DKA300:

       HW REVISION     38314431
                                       HW REVISION = 1D18
       ERROR TYPE            05
                                       EXTENDED SENSE DATA RECEIVED
       SCSI ID               03
                                       SCSI ID = 3.
       SCSI LUN              00
                                       SCSI LUN = 0.
       SCSI SUBLUN           00
                                       SCSI SUBLUN = 0.
       PORT STATUS     00000001
                                       %SYSTEM-S-NORMAL, NORMAL SUCCESSFUL
                                        COMPLETION
       SCSI CMD        00000008
                           0001
                                       READ
       SCSI STATUS           02
                                       CHECK CONDITION

 EXTENDED SENSE DATA

       EXTENDED SENSE  000300F0
                       0C000000
                       00000000
                       00E00011
                           0000
                                       MEDIUM ERROR
                                       UNRECOVERED READ ERR IN DATA
       UCB$B_ERTCNT          04
                                       4. RETRIES REMAINING
       UCB$B_ERTMAX          00
                                       0. RETRIES ALLOWABLE
       ORB$L_OWNER     00010001
                                       OWNER UIC [001,001]
       UCB$L_CHAR      1C4D4008
                                       DIRECTORY STRUCTURED
                                       FILE ORIENTED
                                       SHARABLE
                                       AVAILABLE
                                       MOUNTED
                                       ERROR LOGGING
                                       CAPABLE OF INPUT
                                       CAPABLE OF OUTPUT
                                       RANDOM ACCESS
       UCB$W_STS           0000
       UCB$L_OPCNT     00029534
                                       169268. QIO'S THIS UNIT
       UCB$W_ERRCNT        0001
                                       1. ERRORS THIS UNIT
       IRP$W_BCNT          0200
                                       TRANSFER SIZE 512. BYTE(S)
       IRP$W_BOFF          009C
                                       156. BYTE PAGE OFFSET
       IRP$L_PID       000A003A
                                       REQUESTOR "PID"
       IRP$Q_IOSB      00000001
                       00B30000        IOSB, 0. BYTE(S) TRANSFERRED