Redhat Linux

[PVR]

How to find out how many Hard disks are there in one Redhat Linux system ??
Thanks in advance !!

[Alexander Chuzhoy]

If the RedHat is installed on server with raid that comes with managemenet software- you can use that software to see how many disks are there.

You can also try the hwbrowser utility-under hard drives -it shows all the drives it founds.

[HGN]

Hi

If the RAID you are using is a hardware raid then you can find with the fdisk command. If there are multiple array you need to run fdisk on the other device to find free space. to find the device do a df -k and use the device name to find free space on the first array where the OS resides(fdisk /dev/dsk/c0t0d*) and do a p for print.
This will display the partion details. You can have only upto 15 partions on a single array.

Rgds

HGN

[Steven E. Protter]

Physical hard disks?

num=$(ll /dev/dsk | grep hd| wc -l)

That should give the number of disks but might include the cd-rom

SEP

[xyko_1]

Hi PVR,

try dmesg | grep disk

The output will show you all disks that your system can see.

The disks may be a "real" disk or a virtual disk, i.e., a disk that is configured in a raid controller with two or more real disks.

Disk may also be a lun on a external storage like EMC Clarion.

Hope it helps.
Xyko

[Ross Minkov]

cat /proc/partitions
fdisk -l

[Marco Di Ianni]

You can use also
#cfdisk

This is a semi-grafic tool for manage disks and partition.

If you use IDE disks you can type:

# dmesg | grep hd

or, for SCSI disks:

# dmesg | grep sd


By!

[PVR]

Steven

ll /dev/dsk is not working. I can't see dsk folder is /dev

OS is redhat Enterprise Linux AS 3.

[Dinesh_15]

Hi

fdisk -l works

Rgds
Dinu

[Johannes Krackowizer_1]

hi,

have a look at directory /proc/ide there are all ide-controllers and ide-drives that your kernel found. for example if there is a link called hda then you know there is a primary master ide-drive. look at /proc/ide/hda/driver to see if it is a disk, cdrom, ...

have a look at /proc/scsi/scsi to see all attached scsi devices that are found by the kernel.

best regards

johannes

[Marco_113]

Try the lshw tool:http://ezix.sourceforge.net/software/lshw.html

[Sean Crosby_1]

Great post.
This help me out too!

sdc/