linux-ext4 - Re: [PATCH, RFC] mke2fs: get device topology values from blkid

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Date:	Sun, 20 Sep 2009 16:46:00 -0400
From:	"Martin K. Petersen" <martin.petersen@...cle.com>
To:	Andreas Dilger <adilger@....com>
Cc:	"Martin K. Petersen" <martin.petersen@...cle.com>,
	Eric Sandeen <sandeen@...hat.com>,
	ext4 development <linux-ext4@...r.kernel.org>
Subject: Re: [PATCH, RFC] mke2fs: get device topology values from blkid

>>>>> "Andreas" == Andreas Dilger <adilger@....com> writes:

Andreas> Yes, there is more chance that writing sector 7 (due to 4k
Andreas> sector r-m-w) will cause collateral damage, but the truth even
Andreas> today is that disks are not going to fail a single 512-byte
Andreas> sector at one time, but more likely 64kB (or whatever the
Andreas> remapping unit size is), so this isn't really introducing a new
Andreas> failure mode.

I keep hearing this disk drive "internal block size" of 32KB or 64KB
being mentioned.  And yet none of the drive firmware engineers I talk to
on a regular basis have ever heard of such a thing...

-- 
Martin K. Petersen	Oracle Linux Engineering
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