Adding new Hard Disk

[osamalinux]

Hi every body;

I have SUSE Linux Enterprise Server 10 (SLES 10) installed and it is working just fine. I have only one "Hot-Swap" HD and Linux sees it as sda and it is partitioned to sda1 and sda2.

Now, I added 3 more "Hot-Swap" Hard Drives, SLES cannot see any of them. I looked at /dev and I did not find devices such as sdb, sdc, ...

So my questions are:
1- Why SLES cannot see my 3 newly added Hard Disks?

2- Why sdb,sdc,...etc are not there in /dev ? Do I need to get them from somewhere?

3- What is the way to install my 3 newly added Hard Disks, and how can I have each one of them in a separate partition? In other words, the end result I want is:
- sda1 (Which I already have)
- sda2 (Which I already have)
- sdb
- sdc
- sdd

I'm really in a hurry and your help is mostly appreciated,

Thanks,

Osama.

[MikeTbob]

YOu probably need to use fdisk to partition them, then format the partition with whatever filesystem type you want, and then you should see them under /dev/

[osamalinux]

If I need to use fdisk, then I should use something like:

fdisk /dev/sdb

when I do that I get "Unable to open /dev/sdb"

As I said, there is no /dev/sdb, /dev/sdc, ... in my system

The only thing I have is sda

Any idea about what I should do?

Thanks,

Osama.

[gogalthorp]

Easiest to do it from Yast

[osamalinux]

That does not help man,

Yast also sees sda, but does not see any other drives.

I do not know what to do!!!!

Osama.

[Jonathan183]

How many drives do you have connected to the system at a time and how are they connected? What does fdisk -l return?

[osamalinux]

- I'm having IBM x3500 server
- I see 8 "Hot-Swap" slots in the server, 4 of them are occupied by 4 drives. drive1 in slot 0, drive2 in slot 1, drive3 in slot 2, drive4 in slot3.
- Each of the drives is SATA 750GB
-This is what fdisk -l returns:

Disk /dev/sda: 750.0 GB, 750035927040 bytes
255 heads, 63 sectors/track, 91186 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/sda1 1 194 1558273+ 82 Linux swap / Solaris
/dev/sda2 * 195 91186 730893240 83 Linux

I hope that helps,

Thanks,

Osama.

[whych]

You need to look at the server setup. You will probably find 2 disks are used the other 2 are used for raid. This means if a disk goes, your data is mirrored on the other disk. Unless you start again anddon't use raid, you will only see 2 drives.

[gogalthorp]

He is only seeing one drive. Maybe it is set up raid 5??

[osamalinux]

I 'm using RAID, but honestly, I have so little information about it. When I used RAID, I kind of kept the same default settings which I do not really remember.

* What is the effect of RAID on the fact that I see or do not see some drives?
* In order to fix my problems, do I have to reinstall the server again?

Thanks,

Osama.