NetBSD Problem Report #37417
From martin@duskware.de Wed Nov 21 10:59:50 2007
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Date: Wed, 21 Nov 2007 10:52:06 +0000 (UTC)
From: rillig@NetBSD.org
Reply-To: rillig@NetBSD.org
To: netbsd-bugs-owner@NetBSD.org
Subject: newfs_msdos is terribly slow when writing to an external disk
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>Number: 37417
>Category: bin
>Synopsis: newfs_msdos is terribly slow when writing to an external disk
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: bin-bug-people
>State: open
>Class: change-request
>Submitter-Id: net
>Arrival-Date: Wed Nov 21 11:00:00 +0000 2007
>Last-Modified: Wed Nov 21 12:30:01 +0000 2007
>Originator: Roland Illig
>Release: NetBSD 4.99.30
>Organization:
>Environment:
NetBSD bacc.roland-illig.de 4.99.30 NetBSD 4.99.30 (GENERIC) #2: Fri Aug 31 20:40:16 CEST 2007 build@bacc.roland-illig.de:/home/scratch/build/NetBSD/2007-08/work/sys/arch/i386/compile/GENERIC i386
>Description:
I am running "newfs_msdos /dev/sd0e" for a 250 GB partition on an external USB disk. Looking at the code, it seems to me as if each sector is written by itself, while it would probably be much faster to buffer them and write them in blocks of, say, 64 kB, instead of 512b.
>How-To-Repeat:
>Fix:
>Audit-Trail:
From: Martin Husemann <martin@duskware.de>
To: gnats-bugs@NetBSD.org
Cc:
Subject: Re: bin/37417: newfs_msdos is terribly slow when writing to an external disk
Date: Wed, 21 Nov 2007 12:01:48 +0100
On Wed, Nov 21, 2007 at 11:00:01AM +0000, rillig@NetBSD.org wrote:
> I am running "newfs_msdos /dev/sd0e"
Have you tried "newfs_msdos /dev/rsd0e"?
Martin
From: Roland Illig <rillig@NetBSD.org>
To: gnats-bugs@NetBSD.org
Cc:
Subject: Re: bin/37417: newfs_msdos is terribly slow when writing to an external
disk
Date: Wed, 21 Nov 2007 13:28:33 +0100
Martin Husemann wrote:
> The following reply was made to PR bin/37417; it has been noted by GNATS.
>
> From: Martin Husemann <martin@duskware.de>
> To: gnats-bugs@NetBSD.org
> Cc:
> Subject: Re: bin/37417: newfs_msdos is terribly slow when writing to an external disk
> Date: Wed, 21 Nov 2007 12:01:48 +0100
>
> On Wed, Nov 21, 2007 at 11:00:01AM +0000, rillig@NetBSD.org wrote:
> > I am running "newfs_msdos /dev/sd0e"
>
> Have you tried "newfs_msdos /dev/rsd0e"?
Yes, I'm actually doing that. It was a typo.
Roland
(Contact us)
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