linux-kernel - Re: HighPoint RocketRaid 620 vs. RocketRaid 640 -- supported?

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Date:	Mon, 3 Oct 2011 23:13:16 +0300
From:	Pasi Kärkkäinen <pasik@....fi>
To:	Justin Piszcz <jpiszcz@...idpixels.com>
Cc:	linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org
Subject: Re: HighPoint RocketRaid 620 vs. RocketRaid 640 -- supported?

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 ?

Is the ATA<->SCSI translation being done by the HBA firmware, 
or is it handled in the driver? 

-- Pasi (who is too lazy to grep in the driver right now ;)


> Justin.
>
> On Mon, 19 Sep 2011, Justin Piszcz wrote:
>
>> Hi,
>>
>> I have a HighPoint RocketRaid 620 and it works fine with 3.0+.
>> The HighPoint RocketRaid 640 also has a Marvell 88SE9128, can anyne 
>> confirm whether this (x4) PCI-e 2.0 card works in Linux with the 
>> built-in kernel driver?
>>
>> Justin.
>>
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