Event ID: 15
The device, \Device\Harddisk2\DR2, is not ready for access yet.
Which machine are you seeing this on?
I've checked the ESXi host and the data store, partition and the VMFS seem to be ok (two other servers on the same data store back up perfectly fine), and this has lead me to believe that there is something wrong with the virtual hard drives.
What kind of storage/RAID type is that VMDK on?
Now the questions:
- Can I defrag the virtual hdd without taking exchange offline?
If you have a bad disk, one of the last things you ever want to do with it is defrag it. You risk causing further damage.
- If I take the Exchange database offline, is it likely that the database won't mount after I run ESEUTIL against it? I have attempted to restore into a Recovery database but it's in a "Dirty Shutdown" state and I can't fix it, so I'm concerned.
Not sure. "It depends." If you're keeping it on the same disk, you're repairing a database on a bad disk. If you drop the database, move it to a new disk, then try to bring it up, if you do need to repair it, you'd be repairing it on a new disk.
I can't move hosts at this point in time as I have not yet configured the new host (awaiting an extra CPU and RAM).
Can you set up a new disk with a new database and move the mailboxes over to it? That might be your safest bet, though it is possible the IS would crash when you hit the corrupted part of the disk.
As a side note, check for any residual snapshots and that the Veeam proxy doesn't have any extra mounted disks. It shouldn't have anything to do with the issue, but it doesn't hurt to check.