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From: | Hervé Poussineau |
Subject: | Re: [Qemu-devel] [PATCH v3 1/9] fdc: take side count into account |
Date: | Fri, 27 Jan 2012 21:11:07 +0100 |
User-agent: | Thunderbird 2.0.0.23 (Windows/20090812) |
Markus Armbruster a écrit :
Hervé Poussineau <address@hidden> writes:Floppies can be simple or double-sided. However, current code was only taking the common case into account (ie 2 sides).Impact?
This repairs single-sided floppies
Are single sided floppies broken before the patch? How?
Yes. For head > 0, wrong sector number is calculated, so data is read/written at wrong place on underlying block device.
Fortunately, mostly nobody is still using single-sided floppies (only some 360 kB floppies are single-sided), so bug has been neglected since a long time.
Hervé
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