asked on

know my storage devices, (df -h)

hi,
i need to know the available space that i have on my linux machine, so i used df -h command
and it gave me the following:
/dev/sdb2 21G 5.8G 15G ..... /
udev 2.0G 152K 2.0G ...... /dev
/dev/sdb3 444G 2.2G 442G ..... /home

i need to know if those are the storage devices that i have on the machine?

another thing is: executing iostat -k generated the following:
sda 0.00 0.00 ....
sdb 4.95 0.12

the question:
so what are sda and sdb and what are sdb2, sdb3 and udev ?
which of those are my storage devices?
thanks in advance

ASKER CERTIFIED SOLUTION

ravenpl

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mte01

ASKER

so, if i want to calculate my storage size, and the used size, do i simply run the command: df -h
and then calculate the total values?
what about the dvd or cd rooms will they be displayed?
thanks a lot for the fast reply.

ravenpl

> what about the dvd or cd rooms will they be displayed?
Only if they are used (loaded and [auto]mounted).

Basically df shows currently known(in-use) storage. In the provided output there's no partition from /dev/sda mounted. Since it's unused, it's not shown along df output.
Also check /proc/partitions file, it contains all known block devices/partitions along with total sizes.

SOLUTION

gb-sdc

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ravenpl

> fdisk /dev/sda
> p
even safer: fdisk -l /dev/sd[a-z]

SOLUTION

Duncan Roe

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