Anal/dis/rep/read

[Ian Miller.]

when the bad debug.exe was deleted then any bad blocks would have been transparently revectored so when the disk was filled with the temp file and all blocks read then no bad blocks where found.

[faris_3]

Or put in badblk.sys depending on the controller type :

See
[OpenVMS] How are Bad Block Handled on SCSI Disk Devices?

http://h18000.www1.hp.com/support/asktima/operating_systems/009370EE-0A09ACC0-1C009F.html

[Wim Van den Wyngaert]

Rather strange findings.

VMS 7.3 on AStation 500.

Do type of file : parity error.
Defragmenter : aborts when it tries to defragment the file.
Dia reports "MEDIUM ERROR".

ana/dis/read : reports nothing !!!

If I do delete/erase of the file another file created after the delete gets corrupted.

So : bad blocks are not always handled correctly.

I renamed the last corrupted file to .badblocks and marked it with set file/nomov. Defragmenter is now happy. This seems the only working solution.

Wim

[Uwe Zessin]

You could also set it to /NOBACKUP so that its contents are not read during backups.

[Vladimir K. Vershinin]

And BACKUP and RESTORE disk contents.

Vladimir Vershinin

[Uwe Zessin]

Well, if the disks have become that unreliable, then I would try to replace them between the BACKUP and the RESTORE ;-)

But I guess that's not an option. Wim's managers have to get paid first, it does not matter how much time he wastes with unreliable hardware :-(

[Wim Van den Wyngaert]

I have about 70 Stations of 1997 that are not under contract. Bad blocks do happen on non-shadowed disks and after repairing them they can be used for years (or days if you have bad luck).

Another station had lost its bootblock and also its home blocks. But the init went fine.
Should I try to reuse it or throw the station away ?

Wim

[Uwe Zessin]

That was a rethorical question, right?

Sorry, I thought you have a highly mission-critical environment. Sounds like the stations not part of it - never mind.

[Wim Van den Wyngaert]

uwe,

Yes it is mission critical. But management doesn't want to pay the maintenance as long as we have 2 times more stations than users (and I understand because HP is asking a lot for these oldies).

Wim

[Uwe Zessin]

Ah, you're doing self-maintenance with enough spare parts - haven't noticed that until now. Yes, that can make sense, thanks.