I/O errors on DLT 7000 drives

[David Ruska]

> On both of them the polling interval has already been set to 0.

> Should the process show up or not ?

Yes, dm_stape will still be running. What it WON'T do is send commands to the devices on a regular basis (aka polling) to see if they are OK. This behavior can cause conflicts with the fibre bridges -- especially if a long operation (such as rewind) is in process. The polling commands can timeout on the bridge, and this can cause the HBA to reset the bus, and abort a backup.

With POLLING_INTERVAL set to zero, the monitor will only be involved when tape alerts or abnormal SCSI status is logged by the driver. It will still publish EMS notifications for these errors. If you wish to disable the EMS messages, then you could follow the additional steps in Duncan's procedure.

[Stijn V]

I do want to disable EMS for my SAN tape drive as well .... on HP-UX 11.23 but I do not have the following file:
/var/stm/config/tools/monitor/dm_stape.cfg (0 to stop the monitor from polling).

I disabled the EMS monitoring my SAN tape drives like this:

/var/stm/data/tools/monitor/disabled_instances

added:
/storage/events/tapes/SCSI_tape/*
/storage/events/tapes/default/0_1_2_0.2.14.255.0.0.0
/storage/events/tapes/default/0_1_2_0.2.14.255.0.0.1
/storage/events/tapes/default/0_6_1_0.1.14.255.0.0.1
/storage/events/tapes/default/0_6_1_0.1.14.255.0.0.2

But this doesn't help! If I disconnect a the tape drive, I still receive EMS messages about the tape device....

[Stijn V]

Altough I do have a file dm_stape.cfg under: /var/stm/data/Archive

Should I copy this file towards the location: /var/stm/data/tools/monitor ?