Difference between revisions of "Strijker node type details"

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The strijker nodes are 2u Dell R515 servers with 12 front-loading disks each.
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The strijker nodes are [http://downloads.dell.com/Manuals/all-products/esuprt_ser_stor_net/esuprt_poweredge/poweredge-r515_Owner%27s%20Manual_en-us.pdf 2u Dell R515] servers with 12 front-loading disks each.
  
 
They have a [http://www.dell.com/downloads/global/products/pvaul/en/perc-technical-guidebook.pdf PERC H700 Integrated] RAID controller, which can be managed by the MegaRAID Storage Manager software:
 
They have a [http://www.dell.com/downloads/global/products/pvaul/en/perc-technical-guidebook.pdf PERC H700 Integrated] RAID controller, which can be managed by the MegaRAID Storage Manager software:

Revision as of 14:04, 4 November 2015

The strijker nodes are 2u Dell R515 servers with 12 front-loading disks each.

They have a PERC H700 Integrated RAID controller, which can be managed by the MegaRAID Storage Manager software:

/usr/local/MegaRAID\ Storage\ Manager/StorCLI/storcli64 /c0 show all

The Nagios sensor in /usr/local/lib/nagios/plugins/check_lsi_raid checks the state of the controller with a somewhat poorly documented command:

/opt/MegaRAID/storcli/storcli64 adpallinfo a0

Where 'a0' stands for controller 0.

The output of this command contains a summary of the controller status, of which one block is particularly interesting:

                Device Present
                ================
Virtual Drives    : 2 
  Degraded        : 0 
  Offline         : 0 
Physical Devices  : 16 
  Disks           : 14 
  Critical Disks  : 1 
  Failed Disks    : 0 

The 'Critical Disks' here shows there is a disk failing or about to fail. Although individual disk info can be retrieved e.g. with

storcli64 /c0/e32/sall show all

This doesn't directly say that a disk is critical; one has to infer this from the error counts, e.g.

Drive /c0/e32/s5 State :
======================
Shield Counter = 0
Media Error Count = 46
Other Error Count = 137
Drive Temperature =  36C (96.80 F)
Predictive Failure Count = 34
S.M.A.R.T alert flagged by drive = Yes

Visual inspection of the machine will show a blinking led on the failing disk. The numbering of the disks is top to bottom, then left to right with the top left position 0.