[7053] in linux-scsi channel archive
scsi driver transfer size and sync mode
daemon@ATHENA.MIT.EDU (Tony Chung)
Wed Aug 25 18:41:20 1999
Date: Wed, 25 Aug 1999 15:36:33 -0700
From: Tony Chung <chungto@ampex.com>
To: linux-scsi@vger.rutgers.edu
Hi scsi linux experts,
I am evaluating the possibility of whether Linux can support our Ampex
tape drive
and have some questions:
1. Can Linux support single scsi transfer of at least 1040384 bytes?
This is necessary in order to stream our tape drive at 15MBytes per
second.
We are using Adaptec 2944UW card and recently have Sun fix the
Solaris 7 x86 adp driver to support that. So there should be no
hardware limitation.
Basically, the scatter-gather list is increased to 254 from 16.
Will Linux has memory problem to support that?
I already read http://www.torque.net/sg/ but not really sure.
2. After a scsi reset, can the scsi card/driver re-negotiate sync and
wide transfer?
The document "Writing a SCSI Device Driver" by Richard E. Faith
indicate slave_attach() is not implemented!
Any comment on this?
--
=============================
Tony Chung
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