Messages in this thread | | | Date | Mon, 3 Oct 2011 16:16:52 -0400 (EDT) | From | Justin Piszcz <> | Subject | Re: HighPoint RocketRaid 620 vs. RocketRaid 640 -- supported? |
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On Mon, 3 Oct 2011, Pasi Kärkkäinen wrote:
> On Wed, Sep 21, 2011 at 07:28:26AM -0400, Justin Piszcz wrote: >> Hi, >> >> Incase anyone is wondering the same thing, I contacted Highpoint and they >> said (confirmed) the 620 support (which I am using now) is built-in to >> the kernel and the 640 is not, so unless you like compiling kernel >> modules/out of tree drivers for a _boot_ volume and want a regular SATA >> 6.0gbps controller that supports TRIM, I'd go for the 620 even though it >> maxes out around 390-420MiB/s read where a real SAS controller supports >> 490-500MiB/s for an Intel 510 SSD, but remember, SAS controllers (at >> least the one I tested with does not support TRIM and there is no Intel >> SSD optimizer for Linux. >> > > Hmm.. does SAS "SCSI UNMAP" automatically get translated to > ATA TRIM if you hook up SATA disk to SAS HBA ? When attached to a SAS HBA, it simply says:
Jul 14 16:12:03 p34 kernel: [ 22.258855] EXT4-fs warning (device sda2): release_blocks_on_commit:2679: discard not supported, disabling
> > Is the ATA<->SCSI translation being done by the HBA firmware, > or is it handled in the driver? I'm not sure, it would appear the driver handles it, when its on the Sata 6gbps card (not SAS), it works fine: Sep 20 13:53:34 p34 kernel: [ 6.786898] EXT4-fs (sdb2): re-mounted. Opts: discard
> > -- Pasi (who is too lazy to grep in the driver right now ;)
Justin.
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