SHOW DEVICE/FULL Free Blocks > Total Blocks ?

[Scot Newton]

Have not seen this before, but a customer of ours states that when they issue "SHOW DEV/FULL DSA1", the Free blocks count (71777457) is greater than the Total Blocks count (71132000). Anyone familiar with this condition?

[Richard W Hunt · Accepted solution]

First thing I would do is, ASAP, run an Analyze/Disk/Repair on the volume.

Second, there are some SAN disks where the disk presented to the system can change dynamically. I can (barely) imagine that something dynamic happened. See if the problem goes away by dismounting and remounting the disk. (You would have had to do that to do a proper ANALYZE/DISK operation anyway.)

[Hoff]

Sometimes this can be benign, and sometimes not.

The free block count is stored in a lock value block, and it can become skewed. (Older releases had more opportunities for skewed values; newer releases are better here.)

I'd get the disk offline and analyze it, as was previously recommended.

Patch to current for whatever OpenVMS release is here, too.

[Scot Newton]

Thanks.
This is an Alpha running 7.3-1, so the assessment that it is more liable to occur on older versions may apply here. Will request customer to analyze/repair their disk.

[GuentherF]

Happens whenever a node "disappears" in the cluster without having its disks dismounted locally. And on to the system rebooted with mounting the disk /NOREBUILD.

/Guenther

[Scot Newton]

Thanks to all involved. Issue was resolved by:
$ SET VOLUME/REBUILD=FORCE DSA1:

[Scot Newton]

Thanks to all involved, issue was resolved by:
$ SET VOLUME/REBUILD=FORCE DSA1: