I have been receiving the following for the last two days on our server.
NetWare 6.5sp5
BackupExec 9.1.1156

Deactivating pool "Vol1_SP"
Deactivating volume "Vol1_SV"

<Date> <Time> NSS<COMN>-3.24a-xxxx: comnpool.c[2672]
Pool Vol1_SP: System Data I/O error 20204 (zio.c[2260]).

<Date> <Time> NSS<ZLSS>-3.24a-1449: zfsvolumedata.c[212]
Error reading VolumeData Block XXXXXX, status=20206

The share point "vol1_sv" has been deactivated due to deactivate of volume
vol1_sv

<Date> <Time> NSS<ZLSS>-3.24a-1449: zfsvolumedata.c[212]
Error reading Volume Data Block XXXXXX, status=20206

<Date> <Time> NSS<ZLSS>-3.24a-1449: zfslogicalvolume.c[4948]
Error reading PoolData Block XXXXXX, status=20206

<Date> <Time> NSS<ZLSS>-3.24a-1449: zfsvolumedata.c[212]
Error reading Volume Data Block XXXXXX, status=20206

<Date> <Time> NSS<ZLSS>-3.24a-1449: zfslogicalvolume.c[4948]
Error reading PoolData Block XXXXXX, status=20206

Pool Vol1_SP set to deactive state
OFMCDM:<date><time> deleting snapshot pool "vol1_sp"
************************************************** ****************

I also get messages in OFMNW.LOG of:

02006 12 20 20:02:57 Agent requested synchronization.
02006 12 20 20:03:20 NSS Pools synchronized
02006 12 20 20:03:20 Backup Agent Activity Detected
02006 12 20 20:03:20 System Synchronizing
02006 12 20 20:03:20 System Synchronized
22006 12 20 20:05:35 Pool VOL1 cache space exhausted while still
expanding.
02006 12 20 20:05:35 Request to stop synchronization received.
02006 12 20 20:05:38 Backup Complete
02006 12 20 20:05:38 System Not Synchronized
02006 12 20 20:05:38 Agent requested stop synchronization.
02006 12 20 20:05:57 Agent requested synchronization.
02006 12 20 20:06:32 NSS Pools synchronized
02006 12 20 20:06:32 Backup Agent Activity Detected
02006 12 20 20:06:32 System Synchronizing
02006 12 20 20:06:32 System Synchronized



As a result, my backups have errored out. Any ideas?