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Re: Very slow SCSI tape drive with cygwin/Win2kPro
- From: Corinna Vinschen <corinna-cygwin at cygwin dot com>
- To: cygwin at cygwin dot com
- Date: Fri, 27 Aug 2004 14:21:08 +0200
- Subject: Re: Very slow SCSI tape drive with cygwin/Win2kPro
- References: <200408270713.32596.whn@lopi.com>
- Reply-to: cygwin at cygwin dot com
On Aug 27 07:13, Bill Nugent wrote:
> 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
So you didn't look into the `mt status 3' output? I've marked it in my
original reply. It's the Windows driver value for the maximum block size.
That has nothing to do with Cygwin.
Corinna
--
Corinna Vinschen Please, send mails regarding Cygwin to
Cygwin Project Co-Leader mailto:cygwin@cygwin.com
Red Hat, Inc.
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