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?
> > -- > 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 > -- Caution: breathing may be hazardous to your health. -- 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
