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Message-ID: <alpine.DEB.1.10.0811221741500.14817@p34.internal.lan>
Date: Sat, 22 Nov 2008 17:43:45 -0500 (EST)
From: Justin Piszcz <jpiszcz@...idpixels.com>
To: "Moore, Eric" <Eric.Moore@....com>
cc: "Dr. David Alan Gilbert" <linux@...blig.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
Alan Piszcz <ap@...arrain.com>
Subject: RE: Question regarding SAS controllers.
On Sat, 22 Nov 2008, Justin Piszcz wrote:
>
>
> On Sat, 22 Nov 2008, Moore, Eric wrote:
>
>>> Firmware and BIOS for both Integrated RAID and Initiator-Target. Must
>>> boot to DOS to run utility. Batch file simplifies installation.
>>>
>>> Welcome to LSI Logic Integrated SAS Flash Utility
>>> This Utility will upgrade your LSI SAS3442E HBA
>>>
>>
>> Justin - We have linux tools for flashing firmware and bios.
>>
>
> Eric, one final question:
> http://www.lsi.jp/storage_home/products_home/host_bus_adapters/sas_hbas/lsisas3041er/index.html
> This obviously has 4 SAS/SATA ports (regular cables) and looks like it would
> be great in Linux/SW raid for SAS/SATA disks.
>
> This (8 port version):
> http://www.lsi.com/storage_home/products_home/host_bus_adapters/sas_hbas/lsisas3081er/index.html
> Has two SFF-8087 mini-SAS connectors.
>
> It states "two (4) x1 SATA cables"
>
> Does this mean:
>
> 8087 ------------> 8087 (with 4 lanes)
>
> Thus it would require the purchase of an additional breakout cable or
> attachment to a special SATA/SAS enclosure.
>
> or:
>
> 8087 ------------> regular sas/sata/1
> regular sas/sata/2
> regular sas/sata/3
> regular sas/sata/4
>
> Justin.
>
Newegg has the answer:
http://www.newegg.com/Product/Product.aspx?Item=N82E16816118092
http://c1.neweggimages.com/NeweggImage/productimage/16-118-092-07.jpg
Follow-up:
http://www.newegg.com/Product/Product.aspx?Item=N82E16816118058
http://www.newegg.com/Product/Product.aspx?Item=N82E16816118092
How come the reviews are so bad for these cards? (They mostly used the HW
raid function, which I am not interested in).
Eric,
If one runs:
dd if=/dev/disk1 of=/dev/null bs=1M &
For eight disk drives on the 8-port SAS controller in an x8 or x16 slot,
will they be able to achieve the maximum bandwidth of each drive, for
example, velociraptor = 800MiB/s so it should 800MiB/s in aggregate reads
(using direct-bare mode), NOT on-board raid?
Justin.
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