How to check RAID Information in Linux

Have you ever tried to check how the hardware RAID Array configured on server from your Linux Shell? Have you ever wanted to change or modify your Hardware RAID configurations without rebooting the server and without leaving your Linux shell?

hpacucli utility is there to help you, If your server is HP Hardware. hpacucli  (HP Array Configuration Utility CLI) is a command line based disk configuration program for Smart Array Controllers and RAID Array Controllers. You can download and  install hpacucli tool from HP website.

Quick Abbreviations:

chassisname = ch
controller = ctrl
logicaldrive = ld
physicaldrive = pd
drivewritecache = dwc

As root, just type "hpacucli" and you will be into hpacucli command line interface. Let me give you a quick example of what you can do with this hpacucli.

To get the quick details about the RAID controller and its Health:

Using Syntax : ctrl all show testnode:root:/ # hpacucli ctrl all show Smart Array P400 in Slot 9                (sn: PAFGL0P9SWY39U) Using Syntax: ctrl all show status testnode:root:/ # hpacucli ctrl all show status Smart Array P400 in Slot 9    Controller Status: OK    Cache Status: OK    Battery/Capacitor Status: OK

To get a quick idea of how the disks are grouped and which raid level used:

testnode:root:/ # hpacucli ctrl all show Smart Array P400 in Slot 9                (sn: PAFGL0P9SWY39U)

Using Syntax: ctrl all show config testnode:root:/ # hpacucli ctrl all show config Smart Array P400 in Slot 9                (sn: PAFGL0P9SWY39U)    array A (SAS, Unused Space: 0  MB)       logicaldrive 1 (136.7 GB, RAID 1, OK)       physicaldrive 1I:1:1 (port 1I:box 1:bay 1, SAS, 146 GB, OK)       physicaldrive 1I:1:2 (port 1I:box 1:bay 2, SAS, 146 GB, OK)    array B (SAS, Unused Space: 0  MB)       logicaldrive 2 (136.7 GB, RAID 1, OK)       physicaldrive 1I:1:3 (port 1I:box 1:bay 3, SAS, 146 GB, OK)       physicaldrive 1I:1:4 (port 1I:box 1:bay 4, SAS, 146 GB, OK)

To get complete details about how the raid configured in the server:

Using Syntax: ctrl all show config detail testnode:root:/ # hpacucli ctrl all show config detail Smart Array P400 in Slot 9    Bus Interface: PCI    Slot: 9    Serial Number: PAFGL0P9SWY39U    Cache Serial Number: PA2270J9SWXBAV    RAID 6 (ADG) Status: Enabled    Controller Status: OK    Hardware Revision: E    Firmware Version: 7.24    Rebuild Priority: Medium    Expand Priority: Medium    Surface Scan Delay: 15 secs    Surface Scan Mode: Idle    Wait for Cache Room: Disabled    Surface Analysis Inconsistency Notification: Disabled    Post Prompt Timeout: 0 secs    Cache Board Present: True    Cache Status: OK    Cache Ratio: 25% Read / 75% Write    Drive Write Cache: Disabled    Total Cache Size: 512 MB    Total Cache Memory Available: 464 MB    No-Battery Write Cache: Disabled    Cache Backup Power Source: Batteries    Battery/Capacitor Count: 1    Battery/Capacitor Status: OK    SATA NCQ Supported: True    Array: A       Interface Type: SAS       Unused Space: 0  MB       Status: OK       Array Type: Data       Logical Drive: 1          Size: 136.7 GB          Fault Tolerance: 1          Heads: 255          Sectors Per Track: 32          Cylinders: 35132          Strip Size: 128 KB          Full Stripe Size: 128 KB          Status: OK          Caching:  Enabled          Unique Identifier: 600508B1001050395357593339550006          Disk Name: /dev/cciss/c0d0          Mount Points: /boot 196 MB          OS Status: LOCKED          Logical Drive Label: A09C2125PAFGL0P9SWY39U6F89          Mirror Group 0:             physicaldrive 1I:1:2 (port 1I:box 1:bay 2, SAS, 146 GB, OK)          Mirror Group 1:             physicaldrive 1I:1:1 (port 1I:box 1:bay 1, SAS, 146 GB, OK)          Drive Type: Data       physicaldrive 1I:1:1          Port: 1I          Box: 1          Bay: 1          Status: OK          Drive Type: Data Drive          Interface Type: SAS          Size: 146 GB          Rotational Speed: 10000          Firmware Revision: HPDC          Serial Number: 3NM8D3HA00009922LSYG          Model: HP      DG146BB976          Current Temperature (C): 28          Maximum Temperature (C): 42          PHY Count: 2          PHY Transfer Rate: Unknown, Unknown       physicaldrive 1I:1:2          Port: 1I          Box: 1          Bay: 2          Status: OK          Drive Type: Data Drive          Interface Type: SAS          Size: 146 GB          Rotational Speed: 10000          Firmware Revision: HPDC          Serial Number: 3NM8FY4M00009922R00K          Model: HP      DG146BB976          Current Temperature (C): 28          Maximum Temperature (C): 43          PHY Count: 2          PHY Transfer Rate: Unknown, Unknown    Array: B       Interface Type: SAS       Unused Space: 0  MB       Status: OK       Array Type: Data       Logical Drive: 2          Size: 136.7 GB          Fault Tolerance: 1          Heads: 255          Sectors Per Track: 32          Cylinders: 35132          Strip Size: 128 KB          Full Stripe Size: 128 KB          Status: OK          Caching:  Enabled          Unique Identifier: 600508B1001050395357593339550007          Disk Name: /dev/cciss/c0d1          Mount Points: None          OS Status: LOCKED          Logical Drive Label: A09E85F0PAFGL0P9SWY39U8E5C          Mirror Group 0:             physicaldrive 1I:1:4 (port 1I:box 1:bay 4, SAS, 146 GB, OK)          Mirror Group 1:             physicaldrive 1I:1:3 (port 1I:box 1:bay 3, SAS, 146 GB, OK)          Drive Type: Data       physicaldrive 1I:1:3          Port: 1I          Box: 1          Bay: 3          Status: OK          Drive Type: Data Drive          Interface Type: SAS          Size: 146 GB          Rotational Speed: 10000          Firmware Revision: HPDC          Serial Number: 3NM89MV900009922LUZX          Model: HP      DG146BB976          Current Temperature (C): 28          Maximum Temperature (C): 43          PHY Count: 2          PHY Transfer Rate: Unknown, 3.0Gbps       physicaldrive 1I:1:4          Port: 1I          Box: 1          Bay: 4          Status: OK          Drive Type: Data Drive          Interface Type: SAS          Size: 146 GB          Rotational Speed: 10000          Firmware Revision: HPDC          Serial Number: 3NM8DAC800009922QE1N          Model: HP      DG146BB976          Current Temperature (C): 26          Maximum Temperature (C): 41          PHY Count: 2          PHY Transfer Rate: 3.0Gbps, Unknown

Another Method to check the array hardware mirror status

testnode:root:/ # fdisk -l Disk /dev/cciss/c0d0: 146.7 GB, 146778685440 bytes 255 heads, 63 sectors/track, 17844 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes            Device Boot      Start         End      Blocks   Id  System /dev/cciss/c0d0p1   *           1          25      200781   83  Linux /dev/cciss/c0d0p2              26       17844   143131117+  8e  Linux LVM Disk /dev/cciss/c0d1: 146.7 GB, 146778685440 bytes 255 heads, 32 sectors/track, 35132 cylinders Units = cylinders of 8160 * 512 = 4177920 bytes            Device Boot      Start         End      Blocks   Id  System /dev/cciss/c0d1p2               1       35132   143338544   8e  Linux LVM

testnode:root:/ # hpacucli ctrl all show config detail | grep -i /dev/cciss/c0d0          Disk Name: /dev/cciss/c0d0

testnode:root:/ # cat /proc/driver/cciss/cciss0 cciss0: HP Smart Array P400 Controller Board ID: 0x3234103c Firmware Version: 7.24 IRQ: 74 Logical drives: 2 Sector size: 8192 Current Q depth: 0 Current # commands on controller: 0 Max Q depth since init: 161 Max # commands on controller since init: 343 Max SG entries since init: 128 Sequential access devices: 0 cciss/c0d0:      146.77GB       RAID 1(1+0) cciss/c0d1:      146.77GB       RAID 1(1+0)

Be sure to verify your version of hpacucli and refer the ReadMe always, before you trying to modify the configuration of RAID or Smart Array controllers. 

Thank you for reading.

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