Ambrose_Earle@shamrockfoods.com wrote:
Does anyone else experience frequent backup failures?
We have an F840 cluster and we use NetVault to perform ndmpd backups to an overland tape library. Many times we receive messages like
Mon Nov 25 02:43:55 MST [filer: ispfc_main:error]: Tape (switch:0.1L3) hard media error: Sense_Key (3) ASC (c) ASCQ (0)
and the backup fails.
Our same system is also used by a UNIX server and it never fails, so is DataONTAP more sensitive to these types of issues?
Technically, what triggers this?
Any help would be much appreciated,
By this time, we encounter strange problems impliying F85, Overland LXL librairy, and the SCSI card QLogic inside the F85 we use to get some resetting device messages - here it was a firmware problem on the Overland trying to deal with a slightly defectuous Qlogic card (with Adaptec cards, there is no problem) Also on another site, we got some inpredictable failure using an F810 filer, a NeoSerie Overland librairy and the Netvault software, - here was a dumb cable problems, you have to understand that SCSI cables are week and could be damaged rather quiclky; always keep some SCSI cables appart and carfully put them on machines in order the cable wont be to much twisted - also, if the backup work well for at least a while, try to shake the cable and see if the error appear at this time. If yes it definitely demonstrate a cable failure.
hth ( = hope this helps)