Why few drives of the Robotic Library always show down?
This is using Symantec Netbackup 7.7.3. There are 1 clustered master server, 4 media servers, and 4 DB servers. All are using SLES 11. There is a MS Windows-based server for administration console. 2 Robotic Library (IBM TS2500), each with 6 drives are supported.
Recently, a drive (drive 2) was found "no light" (sort of lost of fibre connectivity). When this happened, the given drive was found "down" and no backup job can be conduct. So, we got the vendor to replace the drive. On library console and web portal, this drive 2 is detected. Now, on Netbackup admin console > Media and Device Management > Device Monitor, 3 drives out of 6 were found DOWN. Attempt to up the drive/path were unsuccessful.
The next attempt is, we tried to run the Device Configuration wizard. We went through the process of Device hosts > Scanning Hosts > backup devices > drag & drop config > and finally, Updating device config. The wizard was completed successfully.
However, when back to the device monitor, we still see the same picture - 3 drives Down. Down means few of the media servers failed to connect and so on. What shall we troubleshoot to bring all drives up again? Shall restarting media servers a good try? or restarting few daemon?
Thanks in advance.
Netbackup---TLD-Down.PNG
Recently, a drive (drive 2) was found "no light" (sort of lost of fibre connectivity). When this happened, the given drive was found "down" and no backup job can be conduct. So, we got the vendor to replace the drive. On library console and web portal, this drive 2 is detected. Now, on Netbackup admin console > Media and Device Management > Device Monitor, 3 drives out of 6 were found DOWN. Attempt to up the drive/path were unsuccessful.
The next attempt is, we tried to run the Device Configuration wizard. We went through the process of Device hosts > Scanning Hosts > backup devices > drag & drop config > and finally, Updating device config. The wizard was completed successfully.
However, when back to the device monitor, we still see the same picture - 3 drives Down. Down means few of the media servers failed to connect and so on. What shall we troubleshoot to bring all drives up again? Shall restarting media servers a good try? or restarting few daemon?
Thanks in advance.
Netbackup---TLD-Down.PNG
ASKER
Hi Dr. Klahn,
Shall I do the manual drive addition instead?
Shall I do the manual drive addition instead?
ASKER
My co-worker did something on all the media servers. Most likely he rebooted the servers, and do the rescan again. Now, all drives are appear and operational.
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ASKER
Found the docs from suse > https://www.suse.com/documentation/sle_ha/book_sleha/data/book_sleha.html
This is not unusual. Since all the drives were probably installed brand new at the same time, when one fails it is probable that the others are also ready to fail. A cascade of failing drives is then encountered.
This is why is is imperative to have spares ready on the shelf, because if too many drives fails without immediate replacement and rebuild, the whole RAID set can fail unrecoverably.