On Mon, 2009-11-09 at 09:59 -0700, Chris Worley wrote: > On Mon, Nov 9, 2009 at 9:42 AM, Majed B. <majedb@xxxxxxxxx> wrote: > > Well, SATA uses SCSI emulation so I guess that's no problem, right? > > The only problem is SSD's put Solid State Storage (SSS) behind > SATA/SAS controllers... while compatible w/ old disk technology, it > severely limits performance (i.e. none of these SSD drives do even > 300MB/s... while SSS drives do 800MB/s). While the initial 2.6.27 No, around 280MB/s... and obviously they dont do more, because of the simple limitation of the sata controllers.. this also means they dont need to do as many channels as other devices.. > drivers and ext4 "discard" worked very well with forward-thinking SSS > not encumbered by old controller technology... but, SSD's were not > able to handle it well: > > http://lwn.net/Articles/347511/ > > So it looks like "design by committee" Linux is well behind Windows 7, And how exactly does windows 7 handle this so much better? > while Linux contemplates slowing new technology down to optimize for > ill-designed SSD's. It does? > > Be glad "thumb drives" didn't try to be floppy-drive-compatible!!! > > Chris > > > > On Mon, Nov 9, 2009 at 7:37 PM, Chris Worley <worleys@xxxxxxxxx> wrote: > >> On Sun, Nov 8, 2009 at 6:13 PM, Majed B. <majedb@xxxxxxxxx> wrote: > >>> The firmware which introduced the TRIM command was deemed buggy and > >>> has been pulled out. > >>> > >>> Are there any filesystems that are TRIM-aware? > >> > >> Ext4 (at that level in the kernel, it's referred to as "discard", it's > >> not TRIM until it's issued as a SCSI command). > >> > >> Chris > >>> > >>> On Sun, Nov 8, 2009 at 8:57 PM, Bill Davidsen <davidsen@xxxxxxx> wrote: > >>>> For those of us playing with use of SSD for journals on ext[34], this does > >>>> have implications for RAID performance. > >>>> > >>>> http://hardware.slashdot.org/story/09/10/27/1427209/Intel-Updates-SSDs-Supports-TRIM-Faster-Writes > >>>> > >>>> -- > >>>> Bill Davidsen <davidsen@xxxxxxx> > >>>> Unintended results are the well-earned reward for incompetence. > >>>> > >>>> > >>>> -- > >>>> To unsubscribe from this list: send the line "unsubscribe linux-raid" in > >>>> the body of a message to majordomo@xxxxxxxxxxxxxxx > >>>> More majordomo info at http://vger.kernel.org/majordomo-info.html > >>>> > >>> > >>> > >>> > >>> -- > >>> Majed B. > >>> -- > >>> To unsubscribe from this list: send the line "unsubscribe linux-raid" in > >>> the body of a message to majordomo@xxxxxxxxxxxxxxx > >>> More majordomo info at http://vger.kernel.org/majordomo-info.html > >>> > >> > > > > > > > > -- > > Majed B. > > > -- > To unsubscribe from this list: send the line "unsubscribe linux-raid" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
