MD1000 connected with two SAS cables in unified mode

Jeff Ewing jewing at
Thu Sep 11 15:53:11 CDT 2008

> This configuration is a problem and results in many times in seeing all
> luns 2 times.

That is what is confusing me. I expected to see two paths in /proc/scsi/scsi
and two sets of devices in OpenManage but I dont.  I was wondering if this 
provided some kind of fail over facility. If not, I will get the second cable
removed by our Dell service technician when we add more PERC cards and arrays
next week.

On Thu, Sep 11, 2008 at 01:06:31PM +0100, Patrick_Fischer at wrote:
> Two cables are only supported in split mode in all other cases only one.
> It has its cause that it is not in the manual because it doesn't make
> sence anyway.
> -----Original Message-----
> From: linux-poweredge-bounces at
> Sent: Thursday, September 11, 2008 1:57 PM
> To: linux-poweredge-Lists
> Subject: MD1000 connected with two SAS cables in unified mode
> The MD1000 array on my Redhat server was connected with two SAS cables
> from the dual port PERC 5 card to each EMM on the MD1000 array.
> It operates in unified mode.
> This configuration is not described in the
> MD1000 Hardware owners manual.
> Could this configuration cause problems?
> Does this configuration provide any benefit?
> Jeff

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