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TECHNOTES
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BULLETIN #: 210
Date: 21 March 1991
Summary: Problem with bad block remapping on ST506 and
ESDI hard disk controllers
Server: ISA (AT) version of VINES/386 and VINES/486
Software Version: 4.00 (0), 4.00 (1), 4.00 (2)
Category: VINES
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PROBLEM:
A site-specific patch called 4.00 patch 2YXXX is available from
Banyan that fixes a problem with the file system in VINES 4.00.
This patch can be applied to VINES Revisions 4.00 (0), 4.00 (1),
and 4.00 (2). It is available from your Support Center.
Note that the fix for this problem will be included in a subsequent
maintenance patch and in all future revisions of VINES.
The problem occurs when all of the following conditions are met:
■ Your server is running VINES/386 or VINES/486 (ISA). Other
platforms (such as VINES/286, PS/2 servers, and Banyan/CNS
servers) do not exhibit this problem.
NOTE: VINES/SMP servers could also exhibit this problem.
However, since very few COMPAQ SYSTEMPRO servers run with
ESDI or ST506 hard disks, patch 2YXXX was not cut VINES SMP.
If you are running an ST506 or ESDI controller in a VINES SMP
server, turn bad block remapping off and call your Support
Center immediately.
■ The server is running VINES 4.00 (0), 4.00 (1), or 4.00 (2).
■ The server's hard disk is running from an ST506 or an ESDI
controller. (This problem does not occur on hard disks that are
running from SCSI controllers or the COMPAQ IDA controller.)
■ Bad block remapping is enabled on your server.
■ A multiple-sector disk write is being performed over a part of
the hard disk that includes a bad block.
If all of these conditions exist, information before the bad block
will be written to the disk, but information after the bad block will
not be written. Symptoms vary according to which file in the system
is damaged.
SOLUTION:
If you are running a version of VINES that could exhibit this file
system problem, turn bad block remapping off immediately. To do this,
follow these steps:
1. From the System Maintenance menu, select Configure/Diagnose
Server.
2. From the VINES Server Configuration menu, select Configure
File System.
3. The next screen displays the status of the bad block remapping
feature for your system. If bad block remapping is ON, select
the option "TURN bad block remapping on/off". This turns off
bad block remapping. The feature should not be turned on again
until patch 2YXXX (or a future VINES maintenance patch or
revision) is applied to your server.
4. Reboot the server.
End of TechNote #210
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