[7112] in linux-scsi channel archive
Re: scsi driver transfer size and sync mode
daemon@ATHENA.MIT.EDU (Robin Miller uhs)
Thu Sep 2 08:57:59 1999
Date: Thu, 2 Sep 1999 08:56:24 -0400 (EDT)
From: Robin Miller uhs <rmiller@zk3.dec.com>
To: chungto@ampex.com, dledford@redhat.com
Cc: linux-scsi@vger.rutgers.edu
Hi All,
I think Tony has already expressed a good reason for larger transfers.
If only for compatability with other operating systems so you can read their
tapes, this in itself is a good enough reason. But even it this tape drive
requires large transfers for "best" performance, then Tony should be able to
tune things to his liking.
On Tru64 Clusters, we use Legato Networker for backups. It normally
uses multiple I/O's each of 256KB for best performance. Tru64 Unix also allows
maximum transfers to whatever the tape drive supports which can be upwards of
16MB-1. The max transfer size, and many other attributes, are all tuneable
via a device detabase.
I personally don't think Tony's request is out of line.
My 2 cents worth,
Robin
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