Good SAS adapters for 6 Gb/s SATA SSD's (with TRIM)?

Prof. Dr. Klaus Kusche
2011-08-11T15:41:12Z

I'm looking for ways to hook up fast 6 Gb/s SATA SSD's (non-RAID!)
to (server or i-X58) mainboards which do not have native 6 Gb/s SATA.

From the reviews I've read so far, two things became obvious:
* The SSD's I'm looking at really want a working SATA TRIM command.
* All the onboard Marvell 88SE9128 (or ASmedia) solutions
seriuosly lack performance, as do PCIe cards based on those chips.

So basically, there seem to be two choices:
1.) LSI 2008
2.) Marvell 9485

1.) seems to be fast, reliable and well-supported,
but as far as I can tell, it doesn't support TRIM at all:
It neither maps SCSI unmap to SATA TRIM,
nor accepts TRIM as a SATA passthrough command.

Is that true?

I didn't find much about 2.)
* The only cards based on this chip are the HighPoint 27xx,
or did I miss something?
* Running a 27xx with the mvsas driver was reported to have stability
problems or random errors. Are these problems solved?
* Is the 27xx fast (with SATA SSD's & mvsas driver),
i.e. significantly faster than onboard SATA 3 Gb/s ports?
* Does the 27xx+mvsas support TRIM when connected to SATA drives?

Are there any other solutions?

--
Prof. Dr. Klaus Kusche
Private address: Rainstraße 9/1, 88316 Isny, Germany
+49 7562 6211377 Klaus.Kusche@computerix.info http://www.computerix.info
Office address: NTA Isny gGmbH, Seidenstraße 12-35, 88316 Isny, Germany
+49 7562 9707 36 kusche@nta-isny.de http://www.nta-isny.de

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