linux-kernel - Overriding reported sector size

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Message-ID: <20110929102318.GA32535@albatross.gern.madduck.net>
Date:	Thu, 29 Sep 2011 12:23:18 +0200
From:	martin f krafft <madduck@...ian.org>
To:	linux kernel mailing list <linux-kernel@...r.kernel.org>
Subject: Overriding reported sector size

Dear list,

recent disks >2Tb come with 4k sectors, but they report 512b sectors
to the OS for "backwards-compatibility" — presumably, other OSs
do not differentiate between physical and logical sector size, which
Linux can do and does.

All the block device layers nowadays can auto-align themselves, but
that obviously only works when they know the true sector size.

Rather than fixing each and every tool, and/or telling each and
every tool to ignore the reported sector size and to use 4k instead,
is there a way by which I can "fix" the sector size at the OS-level?

Thanks,

-- 
 .''`.   martin f. krafft <madduck@d.o>      Related projects:
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`. `'`   http://people.debian.org/~madduck    http://vcs-pkg.org
  `-  Debian - when you have better things to do than fixing systems

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