linux-ext4 - Re: convert from ext3 versus fresh format

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Message-ID: <AANLkTi=mHZf=pofsOFsP9Y6dnvS+vHy_9De=1fz7uCiA@mail.gmail.com>
Date:	Mon, 29 Nov 2010 12:29:58 -0500
From:	Greg Freemyer <greg.freemyer@...il.com>
To:	linux_ext4@...inbox.com
Cc:	linux-ext4@...r.kernel.org
Subject: Re: convert from ext3 versus fresh format

On Sun, Nov 28, 2010 at 4:16 PM,  <linux_ext4@...inbox.com> wrote:
> Hi list,
>
> I have a production system installed on an SSD, whose installer formats
> the target drive as ext3 automatically. I've since learned that ext4 is
> more suited for use on SSDs and am considering an upgrade to ext4.

If your only driver is SSD discard capability, then use the ext4
driver to work with your ext3 partition.  (It's backward compatible.)

Then I would recommend you use the userspace tool wiper.sh / hdparm to
do a once a week or so discard of freespace.

I maintain a page about discard for opensuse that you might find worth reading:
http://en.opensuse.org/SDB:SSD_discard_%28trim%29_support

Greg
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