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I am trying to determine this remote server's hard drive setup including RAID. A developer who was here before me had set it up and I'm trying to determine the procedure for getting things back online if there was a problem. The first step in that is knowing how things are setup.

df -hT output

Filesystem    Type    Size  Used Avail Use% Mounted on
/dev/mapper/ikeyprod-root
              ext3    128G   14G  108G  12% /
tmpfs        tmpfs    7.8G     0  7.8G   0% /lib/init/rw
varrun       tmpfs    7.8G  124K  7.8G   1% /var/run
varlock      tmpfs    7.8G     0  7.8G   0% /var/lock
udev         tmpfs    7.8G  148K  7.8G   1% /dev
tmpfs        tmpfs    7.8G     0  7.8G   0% /dev/shm
lrm          tmpfs    7.8G  2.4M  7.8G   1% /lib/modules/2.6.28-11-server/volatile
/dev/cciss/c0d0p5
              ext2    221M   14M  196M   7% /boot

cat /proc/partitions output

major minor  #blocks  name

 104        0  142253280 cciss/c0d0
 104        1  142006536 cciss/c0d0p1
 104        2          1 cciss/c0d0p2
 104        5     240943 cciss/c0d0p5
 252        0  136183808 dm-0
 252        1    5804032 dm-1
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3 Answers

up vote 1 down vote accepted

Here is a list of commands that provide disk, partition, and other related info (like LVM):

  • cat /etc/fstab
  • cat /etc/mtab
  • cat /proc/mdstat
  • cat /proc/partitions
  • cat /proc/scsi/scsi
  • df
  • fdisk -l
  • mdadm --examine --scan
  • dmraid -r
  • dmraid -b
  • pvs
  • vgs
  • lvs

I have made this a wiki, so please feel free to add more to the list. Also, some explanation for each of the commands might be nice.

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You can use the following commands:

$ df -hT
$ cat /proc/mdstat
$ sudo fdisk -l /dev/sdx

The first command shows the partitions and their size, fs type, and usage.

The second one shows the Raid status.

The third one lists the partitions of the device /dev/sdx (replace x with a letter such as a, b, etc.).

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Does this mean I have 2 partitions? 1 ext3 and 1 ext2? –  Webnet Nov 30 '10 at 16:40
    
@Webnet: Yes / fs is ext3 and /boot fs is ext2. You can also see the size, used, and available. –  Khaled Nov 30 '10 at 16:49
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You seem to be running a HP smart array. Might be a hardware raid. Check the hardware setup with cat /proc/driver/cciss/cciss0. http://cciss.sourceforge.net/

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