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SMART Values

MegaCli and SMART

MegaCli -PDList -a0

Grab all physical disks for the first controller
Find the # value for the "Device Id: #" line

If we want to check smart values for "Device Id: 0"

smartctl -d sat+megaraid,0 -a /dev/sda

-a - all info
/dev/sda - on the first physical disk
-d - the type of sata connected to a megaraid controller "sat+megaraid"
,0 - the device id of 0 on the megaraid controller

If you're not behind a controller the type of -d auto or no -d will sometimes work.

If you do it behind a raid controller it will give you details about the RAID controller

smartctl -a /dev/sda
smartctl 5.42 2011-10-20 r3458 [x86_64-linux-2.6.32-279.el6.x86_64] (local build)
Copyright (C) 2002-11 by Bruce Allen,

Vendor:               DELL
Product:              PERC H710P
Revision:             3.13
User Capacity:        399,431,958,528 bytes [399 GB]
Logical block size:   512 bytes
Logical Unit id:      0x6848f690e5b5700019099da30af179f8
Serial number:        00f879f10aa39d09190070b5e590f648
Device type:          disk
Local Time is:        Wed May  1 11:31:04 2013 EDT
Device does not support SMART

Error Counter logging not supported
Device does not support Self Test logging

Some vendors give a list of known smart errors:
Intel DC S3700 gives a good idea of what their values mean:

Running S.M.A.R.T Tests

Running a short test on a device id 2
smartctl -d megaraid,2 -t short /dev/sda

Show the results of the smart test.
smartctl -d megaraid,2 -l selftest /dev/sda

Display Errors
[root@TPC-F2-22 ~]# smartctl -d megaraid,2 -l error /dev/sda                                
smartctl 5.39.1 2010-01-28 r3054 [x86_64-redhat-linux-gnu] (local build)                    
Copyright (C) 2002-10 by Bruce Allen,                  
Error counter log:                                                                          
           Errors Corrected by           Total   Correction     Gigabytes    Total          
               ECC          rereads/    errors   algorithm      processed    uncorrected    
           fast | delayed   rewrites  corrected  invocations   [10^9 bytes]  errors         
read:       5501       19         0      5520         19        915.209           0         
write:        35        0         0        35          0       2263.117           0         
verify:      411        0         0       411          0        124.426           0         
Non-medium error count:      771                                                            

SMART Health Assesment
[root@TPC-F2-22 ~]# smartctl -d megaraid,2 -Hc /dev/sda                        
smartctl 5.39.1 2010-01-28 r3054 [x86_64-redhat-linux-gnu] (local build)       
Copyright (C) 2002-10 by Bruce Allen,     
SMART Health Status: OK                                                        

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