Mailing-List:	contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Subscribe:	<mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive:	<http://sourceware.org/ml/cygwin/>
List-Post:	<mailto:cygwin AT cygwin DOT com>
List-Help:	<mailto:cygwin-help AT cygwin DOT com>, <http://sourceware.org/ml/#faqs>
Sender:	cygwin-owner AT cygwin DOT com
Mail-Followup-To:	cygwin AT cygwin DOT com
Delivered-To:	mailing list cygwin AT cygwin DOT com
From:	Bill Nugent <whn AT lopi DOT com>
To:	cygwin AT cygwin DOT com
Subject:	Re: Very slow SCSI tape drive with cygwin/Win2kPro
Date:	Fri, 27 Aug 2004 07:13:32 -0400
User-Agent:	KMail/1.7
MIME-Version:	1.0
Message-Id:	<200408270713.32596.whn@lopi.com>
X-IsSubscribed:	yes

Hi Corinna,

Setting tar's -b size up resulted in a radical increase.  Still not 
streaming but real close and workable.  Reading in a 100GB tape with 
500MB to 1,500MB files should take about three or four hours instead of 
three weeks!  I'm going to keep experimenting to see if I can get it to 
stream which should bring it down to 2 hours.  Thank you!

In experimenting I found '-b 20480' was "too large" and did not work.  I 
have not had a chance to determine at what size tar breaks.

Any idea why I can't set the block size greater than 32K using
"mt setblk"?  We have a number of tapes which have a 64K block size and 
I'd rather having to rewrite them.

 Thank you again,
 Bill

--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Problem reports:       http://cygwin.com/problems.html
Documentation:         http://cygwin.com/docs.html
FAQ:                   http://cygwin.com/faq/

- Raw text -