Linux / UNIX: Smartctl Check Hard Disk Behind 3Ware RAID Card

I've CentOS Linux and FreeBSD based server running using 3Ware (9650SE-2LP) RAID card. I know how to check hard disk behind Adaptec raid controllers, but how do I look at ATA / SATA disks behind 3ware SCSI RAID controllers using smartctl command?

You need to use the following device names:
a) IDE / ATA - /dev/hd[a-t]
b) SCSI / SATA - /dev/sd[a-z] OR /dev/twe[0-9] OR /dev/twa[0-9]

HowTo: Look at ATA / SATA Disks Behind 3ware SCSI RAID Controllers

Use the following syntax:

 
smartctl -a -d 3ware,N /dev/tweY
smartctl -a -d 3ware,N /dev/twaY
 

The argument 3ware,N, the integer N is the disk number (3ware "port") within the 3ware ATA RAID controller. The allowed values of N are from 0 to 31 inclusive. You can use the following tw_clin command to find out 3ware port and check RAID card health:
# tw_cli info
Sample outputs:

Ctl   Model        (V)Ports  Drives   Units   NotOpt  RRate   VRate  BBU
------------------------------------------------------------------------
c0    9650SE-2LP   2         2        1       0       1       1      -

To get port info for c0 controller, enter:
# tw_cli info c0
Sample outputs:

Unit  UnitType  Status         %RCmpl  %V/I/M  Stripe  Size(GB)  Cache  AVrfy
------------------------------------------------------------------------------
u0    RAID-1    OK             -       -       -       232.82    W      ON
VPort Status         Unit Size      Type  Phy Encl-Slot    Model
------------------------------------------------------------------------------
p0    OK             u0   233.81 GB SATA  0   -            WDC WD2503ABYX-01WE
p1    OK             u0   233.81 GB SATA  1   -            WDC WD2503ABYX-01WE

Type the following command to view smart information about the hard disk behind 3Ware RAID card, enter:
# smartctl -a -d 3ware,0 /dev/twa0
# smartctl -a -d 3ware,1 /dev/twa0
Sample outputs:

smartctl version 5.38 [i686-redhat-linux-gnu] Copyright (C) 2002-8 Bruce Allen
Home page is http://smartmontools.sourceforge.net/
=== START OF INFORMATION SECTION ===
Device Model:     WDC WD2503ABYX-01WERA0
Serial Number:    WD-WMAYP1327617
Firmware Version: 01.01S01
User Capacity:    251,059,544,064 bytes
Device is:        Not in smartctl database [for details use: -P showall]
ATA Version is:   8
ATA Standard is:  Exact ATA specification draft version not indicated
Local Time is:    Sat Jun 25 13:41:26 2011 UTC
SMART support is: Available - device has SMART capability.
SMART support is: Enabled
=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED
General SMART Values:
Offline data collection status:  (0x84) Offline data collection activity
     was suspended by an interrupting command from host.
     Auto Offline Data Collection: Enabled.
Self-test execution status:      (   0) The previous self-test routine completed
     without error or no self-test has ever
     been run.
Total time to complete Offline
data collection:    (4080) seconds.
Offline data collection
capabilities:     (0x7b) SMART execute Offline immediate.
     Auto Offline data collection on/off support.
     Suspend Offline collection upon new
     command.
     Offline surface scan supported.
     Self-test supported.
     Conveyance Self-test supported.
     Selective Self-test supported.
SMART capabilities:            (0x0003) Saves SMART data before entering
     power-saving mode.
     Supports SMART auto save timer.
Error logging capability:        (0x01) Error logging supported.
     General Purpose Logging supported.
Short self-test routine
recommended polling time:   (   2) minutes.
Extended self-test routine
recommended polling time:   (  46) minutes.
Conveyance self-test routine
recommended polling time:   (   5) minutes.
SCT capabilities:         (0x303f) SCT Status supported.
     SCT Feature Control supported.
     SCT Data Table supported.
SMART Attributes Data Structure revision number: 16
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
  1 Raw_Read_Error_Rate     0x002f   200   200   051    Pre-fail  Always       -       1
  3 Spin_Up_Time            0x0027   100   253   021    Pre-fail  Always       -       0
  4 Start_Stop_Count        0x0032   100   100   000    Old_age   Always       -       7
  5 Reallocated_Sector_Ct   0x0033   200   200   140    Pre-fail  Always       -       0
  7 Seek_Error_Rate         0x002e   200   200   000    Old_age   Always       -       0
  9 Power_On_Hours          0x0032   100   100   000    Old_age   Always       -       37
 10 Spin_Retry_Count        0x0032   100   253   000    Old_age   Always       -       0
 11 Calibration_Retry_Count 0x0032   100   253   000    Old_age   Always       -       0
 12 Power_Cycle_Count       0x0032   100   100   000    Old_age   Always       -       6
192 Power-Off_Retract_Count 0x0032   200   200   000    Old_age   Always       -       5
193 Load_Cycle_Count        0x0032   200   200   000    Old_age   Always       -       1
194 Temperature_Celsius     0x0022   118   110   000    Old_age   Always       -       25
196 Reallocated_Event_Count 0x0032   200   200   000    Old_age   Always       -       0
197 Current_Pending_Sector  0x0032   200   200   000    Old_age   Always       -       0
198 Offline_Uncorrectable   0x0030   100   253   000    Old_age   Offline      -       0
199 UDMA_CRC_Error_Count    0x0032   200   200   000    Old_age   Always       -       0
200 Multi_Zone_Error_Rate   0x0008   100   253   000    Old_age   Offline      -       0
SMART Error Log Version: 1
No Errors Logged
SMART Self-test log structure revision number 1
Num  Test_Description    Status                  Remaining  LifeTime(hours)  LBA_of_first_error
# 1  Short offline       Completed without error       00%        12         -
SMART Selective self-test log data structure revision number 1
 SPAN  MIN_LBA  MAX_LBA  CURRENT_TEST_STATUS
    1        0        0  Not_testing
    2        0        0  Not_testing
    3        0        0  Not_testing
    4        0        0  Not_testing
    5        0        0  Not_testing
Selective self-test flags (0x0):
  After scanning selected spans, do NOT read-scan remainder of disk.
If Selective self-test is pending on power-up, resume after 0 minute delay.

Please note that if the special character device nodes /dev/twa? and /dev/twe? do not exist, or exist with the incorrect major or minor numbers, smartctl will recreate them on the fly. Typically /dev/twa0 refers to the first 9000-series controller, /dev/twa1 refers to the second 9000 series controller, and so on. Likewise /dev/twe0 refers to the first 6/7/8000-series controller, /dev/twa1 refers to the second 6/7/8000 series controller, and so on.