On Mon, Nov 9, 2009 at 9:42 AM, Majed B. [off-list ref] 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 [off-list ref] wrote:

quoted

On Sun, Nov 8, 2009 at 6:13 PM, Majed B. [off-list ref] wrote:

quoted

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

quoted

On Sun, Nov 8, 2009 at 8:57 PM, Bill Davidsen [off-list ref] wrote:

quoted

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 [off-list ref]
 Unintended results are the well-earned reward for incompetence.


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