linux box HDD size question

[Mikkel L. Ellertson]

M E Fieu wrote:
> Hi.. May I know how to check a size of the HDD (s) in a linux box. If I issued the following
> command, does it mean the total HDD size is 30G ??  Could it be some of the HDD space is not used
> ??  If yes, how to check the real disk space??  Besides, how do we check what is the RAID type and
> how many HDD is beside the box via linux command or other mean ?
> 
> [root at linux root]# df -h
> Filesystem            Size  Used Avail Use% Mounted on
> /dev/sda3             4.0G  289M  3.5G   8% /
> /dev/sda9             6.6G  1.9G  4.5G  30% /apps
> /dev/sda1             250M   45M  193M  19% /boot
> /dev/sda6             5.0G  1.7G  3.1G  36% /home
> none                  1.3G     0  1.3G   0% /dev/shm
> /dev/sda8             2.0G   83M  1.8G   5% /tmp
> /dev/sda7             4.0G  3.1G  712M  82% /usr
> /dev/sda5             6.9G  157M  6.4G   3% /var
> 
Two ways to find the hard drive size would be to look in
/var/log/dmesg or run hdparm. Something like
"hdparm -I /dev/sda".

Mikkel
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