Nightmare to find a SSD with functional TRIM on LSI SAS2008 !

Important Drivers General: Storage Drivers (AHCI/RAID, NVMe and USB)
1

Hello,
I have a Dell PERC H200 card (LSI 92118i) flashed with the latest BIOS/Firmware (from LSI).
TRIM work with my OCZ Vertex 3 (trimcheck OK / Optimization available) but not with a Samsung 850 EVO, Samsung 850 Pro and Kingston V300 !

After research I found info :
http://askubuntu.com/questions/416886/do…er-support-trim
http://comments.gmane.org/gmane.linux.scsi/88189
Apparently we need the SSD supports “deterministic read after trim / read zero after trim” …

But how to know before buying !! ??

2

Well finally I sent (refund) my 850 Pro 256GB and I bought a 840 Pro 256GB …
and TRIM is OK !

LSI SAS2008 controller but apparently also SAS2308 have an odd behavior with the write cache :
http://www.servethehome.com/lsi-sas-2308…che/#reply-form

Nobody has heard of “deterministic read after trim / read zero after trim” ?

3

Thanks for the info and the link.

Not me.

4

Full test of my 840 Pro :

Windows Write Cache Off :

as-ssd-bench_840Pro_WCoff.png

crystaldisk_WCoff.png

HDTune_File_Benchmark__840Pro_WCoff.png

Anvils_840Pro_WCoff.png

Anvils_840Pro_WCoff-WriteTrough.png



Windows Write Cache On :

as-ssd-bench_840Pro_WCon.png

crystaldisk_WCon.png

HDTune_File_Benchmark__840Pro_WCon.png

Anvils_840Pro_WCon.png

Anvils_840Pro_WCon-WriteTrough.png



Windows Write Cache On & "Turn off Windows write-cache buffer flushing on the device" checked :

as-ssd-bench_840Pro_WCon-CFlushOff-04.png

crystaldisk_WCon-CFlushOff.png

HDTune_File_Benchmark__840Pro_WCon-CFlushOff.png

Anvils_840Pro_WCon-CFlushOff-03.png

Anvils_840Pro_WCon-CFlushOff-WriteTrough-01.png




Incomplete test of my Vertex3 :

Windows Write Cache Off :

as-ssd-bench-OCZ-VERTEX3-nocach.png

HDTune_File_Benchmark_ATA_____OCZ-VERTEX3nocash.png



Windows Write Cache On :

as-ssd-bench-OCZ-VERTEX3.png

HDTune_File_Benchmark_ATA_____OCZ-VERTEX3.png



Windows Write Cache On & "Turn off Windows write-cache buffer flushing on the device" checked :

as-ssd-bench-OCZ-VERTEX3vidage.png




And very incomplete test of my 850 EVO :

Windows Write Cache On & "Turn off Windows write-cache buffer flushing on the device" checked :

as-ssd-bench ATA Samsung SSD-desact-vid.png

crystal-850evo-desact-vid.png

HDTune_File_Benchmark_ATA_____Samsung_SSD_850desact-vid.png




Given the results, I suspect CrystalDisk used Write Through.

5

I just bought a NOS Samsung 840 Pro 512GB from Amazon with TB Written 0.0 for $139.99, the prices are coming down. Looked at OWC Accelsior S PCIe card, but only utilizes 1-lane of x4 card because I have PCIe v1.0 x4 slot. Now looking at ‘LSI 9211-4i HBA IT Mode 4-Ports SATA SAS 6Gb/s PCIe’ at ebay for $45.98. Found this thread searching if supports TRIM. If LSI 92118i does, LSI 9211-4i will. Microsoft drivers burned my ass downgrading my non-AHCI compliant SATA II to an IDE SATA I, and I’m hell-bent to find a solution. Does anyone know if LSI 9211-4i flashed in IT Mode can configure two lanes into one SATA thoughput? If not, I hope to get four SATA III ports @ 190+ mb/s down their own dedicated lanes.

6

LSI_9211_840_PRO_512.jpg

   vanden, I need your help! I've got an LSI SAS 9211-4i with Samsung 840 Pro 512 up and running on a Asus A8N-SLI Premium in PCIe v1.1 4x slot. <br />                                                                           Need help configuring and testing TRIM! Looks like 9211 is drawing from 2 lanes?