How to check HDD info

catiewong · 09-19-2018, 09:37 PM

I would like to know how many disk (and each of its size ) in my system , and which raid level ( eg. raid 5 ,6 etc ) is running , how to do it .

I use the command lsblk , the result as below , how do I know what HDD size it it ?

Code:

sda                                                                                            8:0    0 557.8G  0 disk
├─sda1                                                                                         8:1    0   500M  0 part /boot
└─sda2                                                                                         8:2    0 557.3G  0 part

jsbjsb001 · 09-19-2018, 09:57 PM

Quote:

Originally Posted by catiewong

I would like to know how many disk (and each of its size ) in my system , and which raid level ( eg. raid 5 ,6 etc ) is running , how to do it .

I use the command lsblk , the result as below , how do I know what HDD size it it ?

Code:

sda                                                                                            8:0    0 557.8G  0 disk
├─sda1                                                                                         8:1    0   500M  0 part /boot
└─sda2                                                                                         8:2    0 557.3G  0 part

Is this homework?

If so, you should really do some research. I can think of at least couple of different commands that would tell you that info.

Please look at the following commands;

Code:

man parted
man fdisk

berndbausch · 09-20-2018, 12:19 AM

Quote:

Originally Posted by catiewong

I would like to know how many disk (and each of its size ) in my system , and which raid level ( eg. raid 5 ,6 etc ) is running , how to do it .

I use the command lsblk , the result as below , how do I know what HDD size it it ?

Code:

sda                                                                                            8:0    0 557.8G  0 disk
├─sda1                                                                                         8:1    0   500M  0 part /boot
└─sda2                                                                                         8:2    0 557.3G  0 part

When I run lsblk, it shows the size. This is Ubuntu on an Odroid:

Code:

$ lsblk
NAME        MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sda           8:0    0  2.7T  0 disk
└─sda1        8:1    0  2.7T  0 part /mnt/backup
mmcblk0     179:0    0 29.7G  0 disk
├─mmcblk0p1 179:1    0  128M  0 part /media/boot
└─mmcblk0p2 179:2    0 29.6G  0 part /

Perhaps you have to specify the size explicitly. In this case, try

Code:

$ lsblk -o NAME,SIZE
NAME         SIZE
sda          2.7T
└─sda1       2.7T
mmcblk0     29.7G
├─mmcblk0p1  128M
└─mmcblk0p2 29.6G

For the RAID level, it depends. If you use LVM, the lvdisplay command should show you the RAID level of logical volumes. If you use MD RAID (the standard Linux software RAID solution), use a command like mdadm -D. If you have a real RAID device, it should have its own tool to see the RAID level.

catiewong · 09-20-2018, 03:13 AM

thanks,

If I want to know what raid level is using , is it possible ?

berndbausch · 09-20-2018, 04:48 AM

Quote:

Originally Posted by catiewong

thanks,

If I want to know what raid level is using , is it possible ?

Read the last paragraph of my answer:

Quote:

For the RAID level, it depends. If you use LVM, the lvdisplay command should show you the RAID level of logical volumes. If you use MD RAID (the standard Linux software RAID solution), use a command like mdadm -D. If you have a real RAID device, it should have its own tool to see the RAID level.

Let me give you an example for a real RAID device: If your server is an HPE Proliant, you probably have a so-called Smartarray inside, HPE's hardware RAID. The tool to manage, configure and check Smartarrays is called SSA, and the command line utility hpssacli.

JJJCR · 09-20-2018, 05:04 AM

Quote:

Originally Posted by catiewong

thanks,

If I want to know what raid level is using , is it possible ?

lspci -vv | grep -i raid