M500p fails to boot after power outage

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  • Last Post 01 August 2016
Carlton Teel posted this 01 August 2016

We took a power outage and one of our M500p RAIDs is not working properly.  If we remove the disks from the RAID, the controller boots up.  If I install all 15 disks, there are numerous messages that scroll on the screen starting with WARNING: BEM.  I noticed that the first disk only had the power LED on.  I pulled it out and powered up the RAID.  I get the following:

Loading software modules.....

WARNING: BEM - BP:c9f922c0, RD:0, H: 0, Sns: 3, SLBA: 3a385126, HC: 5, CB: a2 CT: 0, CH: 3, CDB[0]:28

WARNING: BEM - BKM:Medium/Recovered Err

WARNING: BEM -

WARNING: BEM - BP:c9f922c0, RD:1, H: 4000000, Sns: 3, SLBA: 3a385126, HC: 5, CB: a2 CT: 0, CH: 3, CDB[0]:28

WARNING: BEM -

WARNING: BEM - Initi info for this RIO fr Chn:3

WARNING: BEM - BP:c9f922c0, RD:0, H: 0, Sns: 3, SLBA: 3a3851a6, HC: 5, CB: a2 CT: 0, CH: 3, CDB[0]:28

WARNING: BEM - BKM:Medium/Recovered Err

WARNING: BEM -

WARNING: BEM - BP:c9f922c0, RD:1, H: 4000000, Sns: 3, SLBA: 3a3851a6, HC: 5, CB: a2 CT: 0, CH: 3, CDB[0]:28

WARNING: BEM-

WARNING: BEM - Initi info for this RIO fr Chn:3

<1>Unalbe to handle kernel NULL pointer dereference at virtual address 00000024

<1>mm = c01afa88 pgd = c0004000

<1>*pgd = 00000000, *pmd = 00000000

Internal error: Oops: 0

Has anyone seen these types of errors and is there a solution to getting the unit back online?

Regards,

Carlton

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Carlton Teel posted this 01 August 2016

I'm speculating that there is information written to the disks about the RAID setup that is no longer valid.  If this is the case, is there someway to restore/recover/clear it?

Regards,

Carlton

Joe Engledow posted this 01 August 2016

BEM errors flooding the terminal prompt on the M-Class usually means there is a bad physical drive. Please remove the physical drive which is causing the problem. If you have any Dead or Stale drive remove those first.

Carlton Teel posted this 01 August 2016

Joe,

Thanks for the information.  The problem I have is trying to figure out which disk(s) is having problems.  All of the disks except for PD1 has both LEDs lite with green lights.  PD1 only has the Power LED on (green).  When I pull it and power up the unit, the Promise kernel crashes.  Is there some other way to determine if there which disk(s) are having issues given the above information?

Carlton

Joe Engledow posted this 01 August 2016

It's not immediately apparent.

What we would do when these calls came in on the support line was to shutdown the Vtrak and power it down, then while it was off, remove all hard drives from the unit. Then after it booted empty and allowed us to login, we would insert the drives one at a time, every 5 minutes, and watch the screen, to see which drive caused the BEM Errors to show.

Carlton Teel posted this 01 August 2016

Joe,

Thanks.  I'll begin that approach.

Carlton

Carlton Teel posted this 01 August 2016

Joe,

I was able to identify the bad disk and get the unit back online.  Thanks for the information!

Carlton

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