Re: Status of SSDs under Fedora ?

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On Fri, Jun 11, 2010 at 10:28:18AM +0100, John Austin wrote:
> So the installer does not set "discard"
> 
> A manual 
> mount -t auto -o discard /dev/sdb2 /mnt/zip
> gives
> /dev/sdb2 on /mnt/zip type ext4 (rw,discard)
> 
> I assume that setting "discard" in /etc/fstab would work

Yes it should.

> It would be highly desirable to have definitive answers to
> 
> 1. Is "discard" set by default in F13?

No.
 
> 2. How can you find what/where the default mount options are set

tune2fs -l /dev/sdb2

though I note that tune2fs in F13 doesn't recognize setting -o discard
yet. :-(
 
> 3. Does setting the "discard" option do everything that is required to enable
> TRIM to do its job with no further action?
> 
> 4. Is it safe to use the "discard" option yet?
> 
> 5. How do you automatically set the "discard" option when hot-plugging an SSD disk?
>    (What controls the mount? hal, udev, XFCE, Gnome, kde, ...)
>    I am using kdm, XFCE and probably bits of gnome

These I don't know.
-Matt

-- 
Matt Domsch
Technology Strategist
Dell | Office of the CTO
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