[CentOS] SAS storage arrays, C6, and SES lights

[Pasi Kärkkäinen]

On Mon, Aug 15, 2011 at 11:19:22AM -0700, John R Pierce wrote:
> So I'm curious how SAS JBOD arrays and linux MDraid as implemented in 
> CentOS6, and SES (SCSI/SAS Enclosure Services) backplane controllers 
> 'get along' and how much configuration is needed to get the warning 
> lights to work properly.
> 
> scenario:   whitebox server with a SAS backplane or two, daisy chained 
> on a SAS HBA (like an LSI Logic 2008), and disks organized as several 
> raid5/6 using linux mdraid.   Does this system have to be configured to 
> ensure that the activity and failure lights match the drive bays, or 
> does the SAS/SES spec all sort that out 'plug and play' ?
> 
> does mdraid properly set those warning lights automatically on a failed 
> raid element?
> 

Afaik the LEDs won't work out-of-the-box.

There's no daemon currently in Linux responsible for monitoring disk status
and lighting up SES LEDs accordingly..

Feel free to write such a daemon! :) (or even better, prove me wrong)

-- Pasi