asked on

Automatically take the output of my non-partitioned disks.

Hello Experts,

How can I automatically take the output of my non partitioned disks? (it will be part of a script).

Let's say that my system is currently with four installed disks: /sda /sdb /sdc /sdd, where only /sda is used. How can I take a command that identifies that b, c, and d are not partitioned, and give me an output as /sdb /sdb /sdc so that I can pipe it to another command.

David Favor

This may be useful, to show partitions...

net10 # sudo lsblk -o NAME,FSTYPE,SIZE,MOUNTPOINT,LABEL | egrep -v ^loop
NAME    FSTYPE               SIZE MOUNTPOINT      LABEL
sda                          1.8T                 
├─sda1                    1004.5K                 
├─sda2  linux_raid_member    999M                 
│ └─md2 ext4                 999M /boot           /boot
├─sda3  swap                29.3G [SWAP]          swap-sda3
└─sda4  linux_raid_member    1.8T                 
  └─md4 ext4                 1.8T /               /
sdb                          1.8T                 
├─sdb1                    1004.5K                 
├─sdb2  linux_raid_member    999M                 
│ └─md2 ext4                 999M /boot           /boot
├─sdb3  swap                29.3G [SWAP]          swap-sdb3
└─sdb4  linux_raid_member    1.8T                 
  └─md4 ext4                 1.8T /               /

Open in new window

Also this, to show any RAID configuration...

net10 # cat /proc/mdstat 
Personalities : [raid1] [raid0] [raid6] [raid5] [raid4] [linear] [multipath] [raid10] 
md4 : active raid1 sdb4[1] sda4[0]
      1921766336 blocks [2/2] [UU]
      [========>............]  check = 43.3% (833905280/1921766336) finish=17564.6min speed=1031K/sec
      bitmap: 13/15 pages [52KB], 65536KB chunk

md2 : active raid1 sda2[0] sdb2[1]
      1022912 blocks [2/2] [UU]
      
unused devices: <none>

Open in new window

ASKER CERTIFIED SOLUTION

Duncan Roe

membership

This solution is only available to members.

To access this solution, you must be a member of Experts Exchange.

Start Free Trial

Ogandos

ASKER

Hey thanks,

I know these options, but none of them can be easily put in a script for detecting which ones are my unpartitioned disks.

Duncan Roe

I think I could cruft up a script that started cat /proc/partitions. But to be sure you would find it useful, could you please post the output from cat /proc/partitions on your system?
And indicate what exactly you would like the script to output (device per line, CSV, ...)