SATA SAS Hard drive is not detected

[kmlrao]

Hello,

I have purchased a new Hard disk of 500Gb( "WD5000BEVT" SATA-SAS drive). My Hard disk is not detected by CentOS 5.4
#uname -mr
2.6.32.10 i686

I tried to load the mtp2sas driver still it is not detecting the HDD

I also saw cat /proc/bus/pci/devices

My Hard disk is not even detected by PCI Bus.

Kudos please help me on this.

[atreyu]

Why do you not think it is detected? It may be detected, but just not be auto-mounting. Open up a terminal as root and:

Run this command to display disk info / partition table info of all attached hard drives:

fdisk -l

Run this command to show you the model names of attached disks:

grep -H . /sys/block/sd*/device/model

[/code]

[kmlrao]

fdisk -l output
-bash-3.1# fdisk -l

Disk /dev/sda: 4021 MB, 4021936128 bytes
16 heads, 63 sectors/track, 7793 cylinders
Units = cylinders of 1008 * 512 = 516096 bytes

Device Boot Start End Blocks Id System
/dev/sda1 * 1 1 472+ 83 Linux
/dev/sda2 2 3683 1855728 83 Linux
/dev/sda3 3684 7365 1855728 83 Linux


/sys/block/sd*
is not detecting my Hardd drive

[atreyu]

Have you confirmed that the drive is being detected by the computer at the BIOS level? If not, reboot and enter the BIOS (usually the Del or F1 or F2 key). In one of the main screens of the BIOS you should see detected hard drives.

If it is not there, then I would suggest powering off the PC and checking the SATA cables (both data and power) going from the drive to the motherboard.

It might also be prudent to check the motherboard documentation for information on the proper procedure for connecting additional hard drives.

[kmlrao]

Have you confirmed that the drive is being detected by the computer at the BIOS level? If not, reboot and enter the BIOS (usually the Del or F1 or F2 key). In one of the main screens of the BIOS you should see detected hard drives.

If it is not there, then I would suggest powering off the PC and checking the SATA cables (both data and power) going from the drive to the motherboard.

It might also be prudent to check the motherboard documentation for information on the proper procedure for connecting additional hard drives.

Yes BIOS detects the drive during boot up time.

[atreyu]

That is indeed mysterious.

Have you checked the output of dmesg for any hints?, e.g.:

dmesg|grep sd

Is it possible to download and boot the CentOS 6.0 LiveCD, to see if the updated kernel makes a difference?