Am Montag, 4. Juli 2011 schrieb Leonidas Spyropoulos: > On Mon, Jul 4, 2011 at 5:20 PM, Martin Steigerwald <mar...@lichtvoll.de> wrote: > > Am Samstag, 2. Juli 2011 schrieben Sie: > >> On Sat, 2011-07-02 at 19:08 +0100, Leonidas Spyropoulos wrote: > >> > Hello, > >> > > >> > I just installed an archlinux with btrfs root partition and would > >> > like to set the correct mount properties > >> > Following this: > >> > https://wiki.archlinux.org/index.php/Solid_State_Drives > >> > it says there that I should use the discard mount parameter to > >> > enable TRIM. > >> > > >> > I would like to ask by using ssd mount parameter would TRIM be > >> > enabled? The SSD is Intel 320 Series 120Gb > >> > >> No, the "ssd" mount parameter has nothing to do with TRIM. > > > > [...] > > > >> The discard option is not currently automatically enabled; I think > >> there may have been some performance issues in certain cases with > >> drives that have slow trim implementations. But feel free to give it > >> a try. > > > > As alternative use fstrim command from time to time or regularily > > during a cron job. From what I understood it does batched discard of > > all free blocks in a filesystem. > > > > merkaba:~> time fstrim -v / > > /: 5044342784 bytes was trimmed > > fstrim -v / 0,00s user 0,36s system 10% cpu 3,486 total > > > > merkaba:~> time fstrim -v /home > > /home: 27062587392 bytes was trimmed > > fstrim -v /home 0,00s user 0,92s system 20% cpu 4,512 total > > > > First one is BTRFS, second one is Ext4 - and will be, until I am > > convinced that BTRFS has a fully featured and working fsck and until > > its experimental flag is removed. > > > > fstrim is in util-linux(-ng) when its new enough. > > Do I need to run fstrim command while the partition is offline or can > it be done while mounted?
It is run on a mount point, so I think the filesystem needs to be mounted. They are here. -- Martin 'Helios' Steigerwald - http://www.Lichtvoll.de GPG: 03B0 0D6C 0040 0710 4AFA B82F 991B EAAC A599 84C7 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
