linux-kernel - Re: locking sectors of raw disk (raw read-write test of mounted disk)

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Message-ID: <455B8979.6090101@cfl.rr.com>
Date:	Wed, 15 Nov 2006 16:41:13 -0500
From:	Phillip Susi <psusi@....rr.com>
To:	Yakov Lerner <iler.ml@...il.com>
CC:	Kernel <linux-kernel@...r.kernel.org>
Subject: Re: locking sectors of raw disk (raw read-write test of mounted disk)

No, you can not tamper with the underlying data while the kernel has it 
mounted.

Yakov Lerner wrote:
> I'd like to make read-write test of the raw disk, and disk has
> mounted partitions. Is it possible to lock  range of sectors
> of the raw device so that any kernel code that wants to write
> to this range will sleep ? (so that test
>    { lock range; read /dev/hda->buf; write buf->/dev/hda; unlock }
> won't corrupt the filesysyem ?)
> 
> Thanks
> Yakov

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