From: Jens Axboe <axboe@suse.de>
To: Pat LaVarre <p.lavarre@ieee.org>
Cc: linux-scsi@vger.kernel.org
Subject: Re: 2 KiB/block loopback found where
Date: Mon, 29 Sep 2003 18:46:54 +0200 [thread overview]
Message-ID: <20030929164654.GS15415@suse.de> (raw)
In-Reply-To: <1064850600.25057.7.camel@patehci2>
On Mon, Sep 29 2003, Pat LaVarre wrote:
>
> I want a 2 KiB/block loopback device to help debug udf.ko.
>
> I get 0.5 KiB/block. Did I fail to find an option or an appropriate
> kernel patch, I do I have to write my own patch? I'm guessing I'll find
> 2 KiB/block easy to fake, since 0.5 KiB divides evenly into 2 KiB.
>
> Specifically, I want to see 2048 where now I see 512 in response to my
> query `blockdev --getss`. A more complete example console log follows:
>
> Pat LaVarre
>
> $
> $ dd of=dd.bin bs=1M count=1 if=/dev/zero
> 1+0 records in
> 1+0 records out
> $
> $ ls -l dd.bin
> -rw-rw-r-- 1 pat pat 1048576 Sep 29 09:43 dd.bin
> $
> $ sudo /sbin/losetup /dev/loop0 dd.bin
> $
> $ sudo blockdev --getss /dev/loop0
> 512
> $
Add a quick hack to loop to set 2kb block size, grep for set_blocksize.
--
Jens Axboe
next prev parent reply other threads:[~2003-09-29 16:46 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-09-22 22:55 [linux-usb-devel] Re: USB storage problems on OHCI Pat LaVarre
2003-09-29 14:54 ` Pat LaVarre
2003-09-29 15:50 ` 2 KiB/block loopback found where Pat LaVarre
2003-09-29 16:46 ` Jens Axboe [this message]
2003-09-29 17:12 ` Pat LaVarre
2003-09-29 20:02 ` Pat LaVarre
2003-10-06 17:12 ` max GiB written per boot Pat LaVarre
2003-10-06 18:12 ` writable mmc profiles actually are writable Pat LaVarre
2003-10-06 18:22 ` Jens Axboe
2003-10-06 18:25 ` Jens Axboe
2003-10-06 19:50 ` Pat LaVarre
2003-10-06 20:38 ` Jens Axboe
2003-10-06 20:58 ` Pat LaVarre
2003-10-06 22:14 ` Pat LaVarre
2003-10-06 23:56 ` Pat LaVarre
2003-10-07 5:38 ` Jens Axboe
2003-10-07 6:45 ` Matthew Dharm
2003-10-07 6:48 ` Jens Axboe
2003-10-07 7:00 ` Matthew Dharm
2003-10-07 7:04 ` Jens Axboe
2003-10-10 20:36 ` Pat LaVarre
2003-10-10 21:04 ` Pat LaVarre
2003-10-10 21:25 ` Pat LaVarre
2003-10-10 22:43 ` Pat LaVarre
2003-10-10 23:16 ` Pat LaVarre
2003-10-11 0:43 ` Pat LaVarre
2003-10-07 20:46 ` Pat LaVarre
2003-10-07 21:00 ` Jens Axboe
2003-10-09 23:01 ` Pat LaVarre
2003-10-07 7:00 ` Jens Axboe
2003-10-06 20:10 ` Pat LaVarre
2003-10-06 20:28 ` Jens Axboe
2003-10-06 20:21 ` Pat LaVarre
2003-10-06 20:33 ` Jens Axboe
2003-10-06 21:00 ` max GiB written per boot Pat LaVarre
2003-10-06 23:47 ` Pat LaVarre
2003-10-07 5:57 ` Jens Axboe
2003-10-07 22:12 ` Randy.Dunlap
2003-10-07 22:57 ` Willem Riede
2003-10-08 1:27 ` Randy.Dunlap
2003-10-08 4:34 ` Randy.Dunlap
2003-10-08 6:44 ` Jens Axboe
2003-10-09 21:59 ` Pat LaVarre
2003-10-10 20:54 ` Pat LaVarre
2003-10-07 0:51 ` 2 KiB/block loopback found where Pat LaVarre
2003-09-29 17:55 ` aligned /dev/scd$n reads less rare how Pat LaVarre
2003-09-29 19:39 ` zip of GiB cross-platform Pat LaVarre
2003-09-29 19:50 ` Matthew Wilcox
2003-09-29 19:56 ` Pat LaVarre
2003-10-24 14:41 ` aligned /dev/scd$n reads less rare how Pat LaVarre
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