Date: Wed, 21 Oct 2015 11:48:38 +0100 From: krad <kraduk@gmail.com> To: "Brandon J. Wandersee" <brandon.wandersee@gmail.com> Cc: FreeBSD Questions <freebsd-questions@freebsd.org> Subject: Re: gjournal and TRIM: A safe combination? Message-ID: <CALfReyfg-71nCg4K0dKmUK-YmZ8yi0ppeGGv4WOD-2Mt8NP9HQ@mail.gmail.com> In-Reply-To: <867fmh12nq.fsf@WorkBox.Home> References: <867fmh12nq.fsf@WorkBox.Home>
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I thought SU+J was the preferred method these days, not gjournal. I quite out of touch with ufs these days though. On 21 October 2015 at 01:33, Brandon J. Wandersee < brandon.wandersee@gmail.com> wrote: > > I've recently created several new UFS partitions on an SSD. I activated > gjournal on the largest--about 200Gb in size--and afterward received a > warning during boot-up: > > WARNING: /usr/home: TRIM flag on fs but disk does not confirm that > it supports TRIM > > The disk does indeed support TRIM, and `camcontrol identify` can detect > as much, but it seems gjrounal interferes with this detection. But does > it actually interfere with TRIM in any way? More importantly, does it > endanger the data on the filesystem at all? The real issue, I suppose, > is that there are four possible formatting options: > > 1. UFS with TRIM, but without journaling. Disk performance is > maintained, but data is unprotected in the event of a crash. > > 2. UFS with journaling, but without TRIM. Data is likely protected should a > crash occur, but the filesystems need to be periodically recreated with > `newfs -E`to restore performance. > > 4. UFS with both journaling and TRIM. Ideal, so long as one doesn't > interfere with the other. > > 3. UFS with neither journaling or TRIM. Not an option. > > I guess I'm just curious which of the first three I should go for. Daily > backups are part of my routine in any case. Thanks in advance for any > advice or clarification. > -- > ================================================================== > :: Brandon Wandersee :: > :: brandon.wandersee@gmail.com :: > ================================================================== > 'A common mistake that people make when trying to design something > completely foolproof is to underestimate the ingenuity of complete > fools.' > - Douglas Adams > ================================================================== > _______________________________________________ > freebsd-questions@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to " > freebsd-questions-unsubscribe@freebsd.org" >
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