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 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, while Linux contemplates slowing new technology down to optimize for ill-designed SSD's. 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
