From owner-freebsd-current  Sun Feb 18 13:55:22 1996
Return-Path: owner-current
Received: (from root@localhost)
          by freefall.freebsd.org (8.7.3/8.7.3) id NAA07139
          for current-outgoing; Sun, 18 Feb 1996 13:55:22 -0800 (PST)
Received: from luke.pmr.com (luke.pmr.com [206.224.65.132])
          by freefall.freebsd.org (8.7.3/8.7.3) with SMTP id NAA07133
          for <freebsd-current@freefall.FreeBSD.org>; Sun, 18 Feb 1996 13:55:20 -0800 (PST)
Received: (from bob@localhost) by luke.pmr.com (8.6.12/8.6.9) id PAA01590 for freebsd-current@freefall.cdrom.com; Sun, 18 Feb 1996 15:55:21 -0600
From: Bob Willcox <bob@luke.pmr.com>
Message-Id: <199602182155.PAA01590@luke.pmr.com>
Subject: Exabyte 8mm tape drive performance in -current?
To: freebsd-current@freefall.FreeBSD.org (freebsd-current)
Date: Sun, 18 Feb 1996 15:55:21 -0600 (CST)
X-Mailer: ELM [version 2.4 PL24]
Content-Type: text
Sender: owner-current@FreeBSD.ORG
Precedence: bulk

I have observed that the (read and write) performance of my 8mm
Exabyte tape drives on my -current system runs roughly half of what
it is on my 2.1-stable systems (100kb/sec vs. 200kb/sec).  This is
with both the NCR 810 and Adaptec 2940 adapters and using programs
such as dump, tar, dd, team.  The systems that I have compared have
roughly the same hardware (both are 100MHz Pentiums).  Performance
on my Wangtek QIC-525 tape drive is about the same.  Can anybody
offer up an explaination of why this is and what might be done to
fix it?

Thanks,
-- 
Bob Willcox
bob@luke.pmr.com
Austin, TX