On Tue, 21 Oct 2003 02:54:25 -0400, Bob Payne <bob_payne AT FWUK.FWC DOT COM>
wrote:

>We also suffer slow tape positioning on recoveries....but not always! We've
>had a call open with Legato for a year now. Our environment...Solaris 8
>(kernel patch 108528-15....OK ,we're a little behind, st patch 108725-13),
>Networker 6.1.2, HP LTO 1 drives in a STK L700e.
>When it takes a while to position, I've noticed that the moving forward of
>files is quick enough, but moving forward records takes the time and it
>reports it in this way....moving forward 1917 records, moving forward 1440
>records, moving forward 1071 records... and so on, the numbers gradually
>getting smaller.
>Snip from st.conf....
>LTO_Ultrium = 1,0x3b,0,0x1d639,4,0x00,0x00,0x00,0x00,3;
>Anybody any thoughts?
>Bob

Your not using some of the more recent additions to the st driver possibly
the one that might make the best improvment is ST_READ_IGNORE_ILI  0x40000
which would change 0x1d639 to 0x5d639. Also at that level of patch their
are inbuil;t drivers (in st) for HP LTO so you could try with the st.conf
definitions commented out.
If this still doesn't help then man st and play with the settings.

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