[Info-vax] Transient anal/disk errors

[Stephen Hoffman]

On 2013-12-12 17:05:38 +0000, tadamsmar said:

> If I dismount from a shadowset and run anal/disk on the dismounted 
> disk, I sometimes get warnings form anal/disk.

If the applications are not quiesced or shut down when the shadowset 
member is removed from the shadowset, then some errors and 
inconsistencies can arise.

> I just recently started checking this as I have gotten a bit more 
> concerned after I had persistent warnings from anal/disk on one system 
> that required a good bit of cleanup.

I'd start by replacing the disks, then a combination of wholesale 
server replacement, and a software upgrade.  If you have the 
prerequisites available, probably with Itanium.  You're running on 
hardware that I wouldn't recommend to most hobbyists, and you're 
spending far too much time keeping it going based on the various 
postings with the same problems over and over again, which usually 
means that the technical and IT discussions involved here are secondary 
to some non-technical or managerial issues (usually funding, but there 
can be other triggers), and that's not a fun place to be when you're 
trying to keep fossil-grade servers available and operational.

> So perhaps even a dismount from a shadowset is a bit risky for backing 
> up.  Of course, it's a heck of a lot easier than the official way to 
> prep a disk for backup.

If your disks are dismounted when the applications are quiesced, and 
you are getting corruptions, then some combination of hardware and 
software are failing you.


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