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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: Tue, 24 Aug 2004 12:04:53 +0200
- Subject: Re: Very slow SCSI tape drive with cygwin/Win2kPro
- References: <200408231840.52007.whn@lopi.com>
- Reply-to: cygwin at cygwin dot com
On Aug 23 18:40, Bill Nugent wrote:
> mt -f /dev/nst0 setblk 8192
> tar -tf /dev/nst0 -b 32
tar --help, especially the -b option.
> Block size does not seem to be a factor. I've tried 8k, 16k and 32k
> (over 32k doesn't work for some reason).
Did you have a look into the `mt status 3' output below?
Other than that, you will notice that Cygwin is always slower than
native techniques since there's a whole layer of POSIX functionality
on top of the Win32 stuff.
> $ mt -f /dev/st0 status 3
> drive type : 01 (Unknown type of tape device)
> tape capacity : 102629376 KB remaining : 8861696 KB
> current file : 0 active partition : 0
> current block : 0 cur logical block: 0
> General status bits on (45030000):
> BOT WR_PROT ONLINE IM_REP_EN HW_COMP
> min block size : 2 max block size : 32768
^^^^^^^^^^^^^^^^^^^^^^^^^^^
Corinna
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Corinna Vinschen Please, send mails regarding Cygwin to
Cygwin Project Co-Leader mailto:cygwin@cygwin.com
Red Hat, Inc.
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