linux-kernel - Re: ext2 + -osync: not as easy as it seems

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Message-ID: <20090113134503.41318144@lxorguk.ukuu.org.uk>
Date:	Tue, 13 Jan 2009 13:45:03 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Pavel Machek <pavel@...e.cz>
Cc:	kernel list <linux-kernel@...r.kernel.org>, jack@...e.cz,
	tytso@....edu
Subject: Re: ext2 + -osync: not as easy as it seems

> Plus it has a nasty behaviour where it reverts to -W1 if disk
> connection is momentarily lost. (If you unplug/replug SATA disk, linux
> will happily rediscover and use it, but -W0 was already forgotten at
> that point, right?)

If you momentarily lose power your disk state isn't defined anyway. If
you do that with the SATA code it should treat it the same as a scsi disk
swap so it'll get a new device and the old fs will go down.
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