QUANTUM DLT VS160 support

[David Nixon]

I've been testing a QUANTUM VS160 tape drive
under HP-UX 11.11, at PHKL_29899 SCSI Tape
cumulative patch level.
Vxdump to this drive wrote 77GB to one tape
and status - as listed by an 'mt' of the c0t3d0BEST device - showed compression was not
in operation.
Does anyone know if the HP-UX 'stape' driver can or, will in future, allow compression with
a QUANTUM VS160.

[RAC_1]

what does lssf /dev/rmt/c0t3d0BEST says??

[David Nixon]

Oh it just says ..LUN 0 at&t best density available at address 0/0/1/0.3.0 /dev/rmt/c0t3d0BEST

This device (and one named c0t3d0C) never reports compression on.

This is in contrast to our BENCHMARK DLT-1 drives that always compress when
used with /dev/rmt/c#t#d0BEST.

[David Nixon]

On the VS160 hardware compression is enabled by default and cannot be disabled.
Density and length parameters can be
specified for Vxdump and density codes in can be used for further
tests with tape devices.

Enhancement request to HP: please add
support for the VS160 to the "stape" driver
so it can be properly recognised by backup applications and the useful LTT&L drive test utility.