Re: [gentoo-user] SSDs with TRIM issues

[Bruce Hill <daddy@happypenguincomputers.com>]

On Wed, Jun 17, 2015 at 12:24:55PM +1000, Adam Carter wrote:
> /* devices that don't properly handle queued TRIM commands */
> Micron_M500*
> Crucial_CT*M500*
> Micron_M5[15]0*
> Crucial_CT*M550*
> Crucial_CT*MX100*
> Samsung SSD 8*
> 
> from drivers/ata/libata-core.c

Then read further:

         * Whitelist drives that are known to reliably return zeroes
         * after TRIM.

         * The intel 510 drive has buggy DRAT/RZAT. Explicitly exclude
         * that model before whitelisting all other intel SSDs.
         */
        { "INTEL*SSDSC2MH*",            NULL,   0, },

        { "Micron*",                    NULL,   ATA_HORKAGE_ZERO_AFTER_TRIM, },
        { "Crucial*",                   NULL,   ATA_HORKAGE_ZERO_AFTER_TRIM, },
        { "INTEL*SSD*",                 NULL,   ATA_HORKAGE_ZERO_AFTER_TRIM, },
        { "SSD*INTEL*",                 NULL,   ATA_HORKAGE_ZERO_AFTER_TRIM, },
        { "Samsung*SSD*",               NULL,   ATA_HORKAGE_ZERO_AFTER_TRIM, },
        { "SAMSUNG*SSD*",               NULL,   ATA_HORKAGE_ZERO_AFTER_TRIM, },
        { "ST[1248][0248]0[FH]*",       NULL,   ATA_HORKAGE_ZERO_AFTER_TRIM, }

> More info:
> http://linux.slashdot.org/story/15/06/16/201217/trim-and-linux-tread-cautiously-and-keep-backups-handy
> 
> Also, my samsung 840 is slow (multisect is off and cant be enabled with
> hdparm). Tried update the bios but the boot cd crashed on my machine (AMD
> chipset related) so i will have to put it in another machine and try
> again...
> 
> Samsung EVOs also have a firmware bug that causes them to slow down.

I chose long ago not to use queued TRIM (when OCZs were the rage).

From a cursory read this sounds like *only* ext4 fs. I have XFS on all my
SSDs. Two are Samsung 840 Pro Series, and 850 Pro Series. The 840 I've had
over a year and it is golden. The 850 I've had only a couple of months, and
due to work requirements it is running Windows atm. Still, there is nothing
like what I read in this article happening with either.

I also have a Micron C400 RealSSD mSATA 32GB -- no problems with it, either.
It's running Funtoo atm with VFAT /boot for UEFI, swap, all other XFS.