linux-kernel - Re: 12 Veliciraptors again w/x4 card (~1gbyte/sec aggregate read)!

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Date:	Fri, 1 Aug 2008 04:12:45 -0400 (EDT)
From:	Justin Piszcz <jpiszcz@...idpixels.com>
To:	Matt Garman <matthew.garman@...il.com>
cc:	David Greaves <david@...eaves.com>, linux-kernel@...r.kernel.org,
	linux-raid@...r.kernel.org, xfs@....sgi.com
Subject: Re: 12 Veliciraptors again w/x4 card (~1gbyte/sec aggregate read)!



On Thu, 31 Jul 2008, Matt Garman wrote:

> On Tue, Jul 08, 2008 at 04:39:34AM -0400, Justin Piszcz wrote:
>> On Tue, 8 Jul 2008, Justin Piszcz wrote:
>>> On Tue, 8 Jul 2008, David Greaves wrote:
>>>> Justin Piszcz wrote:
>>>>> Each PCI-e x1 card has 1 veliciraptor on it now.
>>>>> Got an x4 card wit 4 sata ports:
>>>> Useful - which card?
>>>
>>> StarTech 4 Port PCI Express x4 SATA II Card Model PEXSATA24E
>>>
>>>
>> Chipset: Marvell 88SX7042
>> SATA Connectivity: Use four internal ports at the same time or two internal
>> and two external ports
>>
>> Which is fully supported in the latest kernels (didn't try an old kernel):
>>
>> linux-2.6.25.10/drivers/ata/sata_mv.c
>>
>>   /* Marvell 7042 support */
>>   { PCI_VDEVICE(MARVELL, 0x7042), chip_7042 },
>
> How have that card and the array attached to it been doing since you
> originally posted this?
No problems to report yet, working well, I wish I had multiple x4 or x16 
slots and use those instead of x1 cards (the mobo would need to support 
the I/O as well)..

>
> Doesn't that HighPoint 23xx card also use the Marvell 88SX7042 chip?
I read remeber 'locked' 64kb read problem but not any corruption issue.

> I remember seeing the threads about the HighPoint card silently
> corrupting data by silently writing over parts of the disk(s) with
Also I MD5SUM -c (verify) 100-150GiB of data daily or so to make sure it 
is OK, so far, no problems.

> its own info.  I'm guessing that's not a "feature" of the Marvell
> chip, but still... admittedly irrational fear here :)
Have not seen it yet.

>
> It would be nice if that Supermicro 8-port SATA card (AOC-SAT2-MV8)
> was available in PCIe... I wonder if it's possible to just graft
> multiple SiI 3132 controllers (2 SATA each) on a single PCIe card?
Yes, I asked Supermicro about it and they never mailed me back about a 
PCIe version..

That's a good question, I suppose if it was easy it would have already 
been done?

Justin.
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