devices that detach themselves

[derek b smith_1]

OS is HPUX 11.23 and we have STK 9940 tape drives fiber attached. The backup software is Veritas Netbackup 6.0 MP3. From time to time we loose connectivity to the tape drivers b/c the devices file keep detaching themselves from the drives at the OS layer. From an ioscan -fnC tape the first 4 drives have no assosiated device files. So it look like this:

tape 17 0/3/1/0.2.12.255.0.0.0 stape CLAIMED DEVICE STK T9940B
tape 18 0/3/1/0.2.17.255.0.0.0 stape CLAIMED DEVICE STK T9940B

They actually exist under /dev but are not attached from ioscan -fnC tape.

The fix is to run an insf -e, but want to find out why it keeps occurring and the permenant solution.

thank you
derek

[Mridul Shrivastava · Accepted solution]

There have been lots of issue with STK tape drives, this problem may be because of old driver. Could you please check for the latest stape drivers ( patches will be available) and check with STK do they have a driver for hpux....

Like for IBm drives they have atdd drivers and for getting best results its advised to use drivers supplied by vendor, as this is not a HP product.