external ESATA drives in a R610

Nataraj incoming-dell-lists at rjl.com
Fri Aug 20 21:26:02 CDT 2010


On 08/19/2010 08:01 AM, Gavin W. Burris wrote:
> Not all silicone image chips work.  I have two here that do not show up
> at boot.  I contacted my rep, and he quoted me a LaCie eSATA controller
> that did the job perfectly in a PowerEdge 1950.  It was: "3 GB eSATA II
> PCI Express Card (A3054338)"
>
> Cheers.
>
> On 08/19/2010 03:39 AM, Bond Masuda wrote:
>   
>> In my experience, the controllers with Silicon Image chipsets provide the
>> best support for eSATA hotplugging. The driver is already in the kernel of
>> RHEL. Beware that trying to convert one of the internal SATA to eSATA may
>> not work; some of the SATA controllers by Intel don't implement the hotplug
>> capability and will lock up the system with a bus reset. I learned this the
>> hard way and after much research found that the Silicon Image controllers
>> were more capable. I think, going from memory from a couple of years ago, I
>> used the Sil3132 chip based controller.
>>
>> -Bond
>>
>>     
>>> -----Original Message-----
>>> From: linux-poweredge-bounces at dell.com [mailto:linux-poweredge-
>>> bounces at dell.com] On Behalf Of Nataraj
>>> Sent: Wednesday, August 18, 2010 3:45 PM
>>> To: linux-poweredge at lists.us.dell.com
>>> Subject: external ESATA drives in a R610
>>>
>>> I'm interested in adding hotplug ESATA capability with port multiplier
>>> for backup purposes to something like an R610.   Is this supported by
>>> any of the Dell external SAS controllers (don't need raid for this).
>>> The machine would already be running SAS disks for it's primary
>>> internal
>>> disks.
>>>
>>> Would these controllers use the AHCI or another of the better
>>> performing
>>> drivers included with Redhat?
>>>
>>> I've also considered various external ESATA cards, but I'm unsure which
>>> ones might work well with Redhat in a poweredge.  I would prefer to
>>> stay
>>> away from drivers provided by the card manufacturer.
>>>
>>> A 4 port x8 card would be nice.  I found a few of the following silicon
>>> image based cards which would be great if they worked with the
>>> sata_sil24 driver, but I have no way of knowing in advance which driver
>>> will load.   Any other suggestions are welcome.
>>>
>>> http://eshop.macsales.com/item/DAT%20Optic/ESATAPCIE8/
>>> This one seems to be a raid version of the one above, but I prefer
>>> non-hardware raid for data archival purposes.
>>> http://www.datoptic.com/four-esata-pci-express.html
>>>
>>> http://www.addonics.com/products/host_controller/adsa3gpx8-4em.asp
>>>
>>> Thank you,
>>> Nataraj
>>>
>>>
>>>
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>>>       
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>>
>>     
>   
Thank your for all the responses.  This was helpful.  The Lacie card
looks identical to the ones I listed as well.  Dell appears to no longer
have it.  I orded the one from macsales, cause they said I could return
it if it didn't work with the linux drivers.

 I sure hope these controllers are more reliable then USB.  Besides the
poor performance, I have a PE2950 that gets I/O errors and kernel panics
when I do heavy I/O to USB drives (centos 5).    The same drives run
fine over usb attached to my notebook.

I tried to look at a kernel crash dump, but I've yet to figure out how
to run crash on an image from a PAE kernel.  Maybe you need to be on a
64 bit system to examine a PAE kernel crash dump.

Nataraj



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