How to find Hardware RAID Information in linux

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Identify your server has physical raid controller or not, if not they may be using software raid. Lets check for physical raid controller.

[root@selva ~]# lspci -vv | grep -i raid
01:00.0 RAID bus controller: LSI Logic / Symbios Logic MegaRAID SAS 2208 [Thunderbolt] (rev 01)
        Kernel driver in use: megaraid_sas
        Kernel modules: megaraid_sas

The above Example output shows exact raid controller specifications. but we are not sure whether the raid has been configured or not.

Open the file /proc/scsi/scsi

[root@selva ~]#  cat /proc/scsi/scsi
Attached devices:
Host: scsi2 Channel: 00 Id: 00 Lun: 00
Vendor: MegaRAID Model: LD 0 RAID5 699G Rev: 513O
Type: Direct-Access ANSI SCSI revision: 02

If your server configured with any raid, here you can find the details. In the above example it shows as RAID 5.

Nowadays all raid controller manufacturers provide you cmd based utility and web-based utility. This will make you to easily identify much more information.

For HP systems, this helps narrow down to a particular model or part number.

HP setups are fairly easy. You can cat /proc/driver/cciss/cciss* and receive an output like:

cciss1: HP Smart Array P800 Controller
Board ID: 0x3223103c
Firmware Version: 4.12
IRQ: 122
Logical drives: 2
Current Q depth: 0
Current # commands on controller: 0
Max Q depth since init: 217
Max # commands on controller since init: 386
Max SG entries since init: 31
Sequential access devices: 0

cciss/c1d0:      587.12GB       RAID 1(1+0)
cciss/c1d1:     1000.17GB       RAID 1(1+0)

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May 29, 2015

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