From: Steven Timm (timm@fnal.gov)
Date: Tue Jul 23 2002 - 11:15:45 EDT
I am observing the following errors on a system which is running
4.0g. The following appears in /var/adm/messages
Jul 22 01:01:22 fnsimu2 vmunix: AdvFS I/O error:
Jul 22 01:01:22 fnsimu2 vmunix: Domain#Fileset: root_domain#root
Jul 22 01:01:22 fnsimu2 vmunix: Mounted on: /
Jul 22 01:01:22 fnsimu2 vmunix: Volume: /dev/rz8a
Jul 22 01:01:22 fnsimu2 vmunix: Tag: 0x0000008e.8004
Jul 22 01:01:22 fnsimu2 vmunix: Page: 1155
Jul 22 01:01:22 fnsimu2 vmunix: Block: 135936
Jul 22 01:01:22 fnsimu2 vmunix: Block count: 256
Jul 22 01:01:22 fnsimu2 vmunix: Type of operation: Read
Jul 22 01:01:22 fnsimu2 vmunix: Error: 5
Jul 22 01:01:22 fnsimu2 vmunix: To obtain the name of the file on
which
Jul 22 01:01:22 fnsimu2 vmunix: the error occurred, type the command:
Jul 22 01:01:22 fnsimu2 vmunix: /sbin/advfs/tag2name //.tags/142
If I do the above command, it comes out that the file it is having
the trouble with is genvmunix. This message is happening nightly
at 01:01 as the defragcron utility runs. It has been going on for at
least a couple of weeks, maybe longer. But otherwise the system
appears to be fine and hasn't crashed at all.
Error message in defragcron.log:
defragment: Can't move file //genvmunix
defragment: Error = I/O error
defragment: Can't defragment domain 'root_domain'
defragcron: could not defragment domain 'root_domain'
My question--
Does this mean that we should just reconfigure the defragger
to not defragment the / domain? Am I trying to defrag
something that shouldn't be defragged?
Or is this a real hardware fault that needs to be serviced?
Steve Timm
------------------------------------------------------------------
Steven C. Timm (630) 840-8525 timm@fnal.gov http://home.fnal.gov/~timm/
Fermilab Computing Division/Operating Systems Support
Scientific Computing Support Group--Computing Farms Operations
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