linux-ext4 - Re: [RFC] store RAID stride in superblock

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Message-ID: <46457BD5.8040301@clusterfs.com>
Date:	Sat, 12 May 2007 12:33:25 +0400
From:	Alex Tomas <alex@...sterfs.com>
To:	Eric <erpo41@...il.com>
CC:	linux-ext4 <linux-ext4@...r.kernel.org>
Subject: Re: [RFC] store RAID stride in superblock


Eric wrote:
> The concept is really tempting. RAID is good, and not asking the user
> for information that the system can find out for itself is good too.
> 
> In the unlikely event that the RAID stride were to change, I think the
> autodetect-each-time method would be superior to the store-in-superblock
> method. Doubly so if the code to detect MD and LVM stride is lean and
> clean.

true, but in some cases (hardware raid, SAN, etc) there is no easy way
to learn that other than asking user.

thanks, Alex


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