On 2014.04.09 at 17:48 +0200, Ruediger Meier wrote: > On Wednesday 09 April 2014, Markus Trippelsdorf wrote: > > On 2014.04.09 at 13:02 +0200, Karel Zak wrote: > > > On Wed, Apr 09, 2014 at 12:07:56PM +0200, Ruediger Meier wrote: > > > > Actually I think daily "fstrim -a" IS not a good idea for most of > > > > my systems > > > > > > install service != enable (this is important detail, I'll never > > > agree with automatically enabled services). > > > > > > BTW, why IS not a good idea for your systems? > > > > The fixed interval is problematic. There are SSD devices out there > > that suffer (their flash cells die out faster) when they get trimmed > > too often. A good rule of thumb is to trim once you have written the > > same amount as you have free space on your device. Obviously, that > > interval varies for every user (e.g. it's one week in my case). > > Is "mount -o discard" instead of fstrim interval more or less bad > regarding lifetime? It really depends on the specific SSD model. But a cron job with fstrim should do a better job in general. > And BTW does fstrim makes sense on non SSDs at all? No. (There are huge storage solutions with thin provisioning, that offer trim support.) -- Markus -- To unsubscribe from this list: send the line "unsubscribe util-linux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
