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 ??
No, it only shows the filesystems which are mounted.
Could it be some of the HDD space is not used
??
Yes, there may be unused space on the disk (not allocated to any
partition/filesystem) and filesystems which are not mounted. They would not be
shown by df.
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 ?
See below.
[root@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
__________________________________________________
Do You Yahoo!?
Tired of spam? Yahoo! Mail has the best spam protection around
http://mail.yahoo.com
fdisk -l will list information on all the hard drives it finds. This includes
the size, and the partition information.
From the partition information you can tell if there are any RAID partitions,
they have type fd and are listed as "Linux raid autodetect".
e.g.
# fdisk -l
Disk /dev/sda: 73.5 GB, 73543163904 bytes
255 heads, 63 sectors/track, 8941 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 * 1 10 80293+ fd Linux raid autodetect
/dev/sda2 11 1035 8233312+ 82 Linux swap
/dev/sda3 1036 3646 20972857+ fd Linux raid autodetect
/dev/sda4 3647 8941 42532087+ 5 Extended
/dev/sda5 3647 4951 10482381 fd Linux raid autodetect
/dev/sda6 4952 5604 5245191 fd Linux raid autodetect
/dev/sda7 5605 8941 26804421 fd Linux raid autodetect
Disk /dev/sdb: 73.5 GB, 73543163904 bytes
255 heads, 63 sectors/track, 8941 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sdb1 * 1 10 80293+ fd Linux raid autodetect
/dev/sdb2 11 1035 8233312+ 82 Linux swap
/dev/sdb3 1036 3646 20972857+ fd Linux raid autodetect
/dev/sdb4 3647 8941 42532087+ 5 Extended
/dev/sdb5 3647 4951 10482381 fd Linux raid autodetect
/dev/sdb6 4952 5604 5245191 fd Linux raid autodetect
/dev/sdb7 5605 8941 26804421 fd Linux raid autodetect
Disk /dev/sdc: 1229.3 GB, 1229375668224 bytes
255 heads, 63 sectors/track, 149463 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sdc1 1 100000 803249968+ 83 Linux
/dev/sdc2 100001 149463 397311547+ 83 Linux
This shows some of the disks on our server. The first 2 are the mirrored system
disks, which contain the swap areas and RAID partitions. /dev/sdc is a 1.2TB
external RAID box which is divided into 2 partitions.
--
Nigel Wade, System Administrator, Space Plasma Physics Group,
University of Leicester, Leicester, LE1 7RH, UK
E-mail : nmw@xxxxxxxxxxxx
Phone : +44 (0)116 2523548, Fax : +44 (0)116 2523555
