Re: SES Enclosure Management.

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On 2/14/12 1:10 PM, Robert Woodworth wrote:
On 02/14/2012 02:06 PM, Jeff Johnson wrote:
On 2/14/12 12:58 PM, Joe Landman wrote:
<..snip...>
enclosure provides a device on the SCSI bus and you exclusively
communicate with that device regardless of the HBA. Most HW RAIDs (LSI
MegaRAID) will hide the SES device exactly like they hide the physical
disks.

A true managed enclosure has nothing to do with the HBA. A managed

Ok. Let me look to see if we can do this. If so, we should be able to help contribute some scripts.
I've been doing this for a while. In SES the various elements (slot, power supplies, fans, etc) are named. At least if your JBOD vendor has their **** together. There is no need to decipher arrays of hex values and modify bits to assert control. Once you know the names of your elements you can address them by name for status and control (fault LED, power on/off, temps, etc).

--Jeff

Correct! Now I just want to connect the RAID system to the SES system so that when a disk fails, the kernel module that failed the disk can light up the LED.

I work for one of those vendors, it's my job to have our **** together.

The trick is to map the disk element names to the block device names. Different SAS HBAs and drivers can enumerate the devices differently. Persistence settings can muck things up as well. Sometimes a failed block device at /dev/sdf can appear as /dev/sdr when replaced. You could use udev rules to create alternate block device names but so far, for important data, I've seen no substitute for a pair of knowledgeable human eyes analyzing a failure and confirming a failed drive by corelating WWNs, etc.

--Jeff

--
------------------------------
Jeff Johnson
Manager
Aeon Computing

jeff.johnson@xxxxxxxxxxxxxxxxx
www.aeoncomputing.com
t: 858-412-3810 x101   f: 858-412-3845
m: 619-204-9061

4905 Morena Boulevard, Suite 1313 - San Diego, CA 92117

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