Symantec NETBACKUP 7 - Manual (Page 96)

Backup jobs fail
If backup jobs fail with an
Error 800: Disk Volume is Down
message, examine
the disk error logs to determine why the volume was marked DOWN.
If the storage server is busy with jobs, it may not respond to master server disk
polling requests in a timely manner. A busy load balancing server also may cause
this error. Consequently, the query times out and the master server marks the
volume DOWN.
If the error occurs for an optimized duplication job: verify that source storage
server is configured as a load balancing server for the target storage server. Also
verify that the target storage server is configured as a load balancing server for
the source storage server.
See “Viewing disk errors and events” on page 97.
Volume state changes to DOWN when volume is unmounted
If a volume becomes unmounted, NetBackup changes the volume state to DOWN.
NetBackup jobs that require that volume fail.
To determine the volume state
◆ Invoke the following command on the master server or the media server that
functions as the deduplication storage server:
The following example output shows that the
DiskPoolVolume
is UP:
Disk Pool Name : PD_Disk_Pool
Disk Type : PureDisk
Disk Volume Name : PureDiskVolume
Disk Media ID : @aaaab
Total Capacity (GB) : 49.98
Free Space (GB) : 43.66
Use% : 12
Status : UP
Flag : ReadOnWrite
Flag : AdminUp
Flag : InternalUp
Num Read Mounts : 0
Num Write Mounts : 1
Cur Read Streams : 0
Cur Write Streams : 0
Troubleshooting
Troubleshooting operational issues 96