Partition information lost on reboot.

[Jegadeesh <kovaiteam@gmail.com>]

Hi,

I have a scsi disk on Adaptec ASC-29320 U320. I have created a linux
partition and ext3 filesystem over it.
Now the problem is, whenever the machine is rebooted, the partition
information to the OS is lost and I get an error saying it as a not valid
block device.
But fdisk tool shows the partitions, but "cat /proc/partitions" doesnt have
this. I need to do a "partprobe" and then have to mount it explicitly.

What could be causing this problem. Given below are some of the command
outputs.

# uname -a
Linux pr.vionline.net 2.6.18-1.2798.fc6 #1 SMP Mon Oct 16 14:37:32 EDT 2006
i686 i686 i386 GNU/Linux

# mount /dev/sda1 /disk1
mount: /dev/sda1 is not a valid block device

# fdisk -l /dev/sda

Disk /dev/sda: 73.4 GB, 73407900160 bytes
255 heads, 63 sectors/track, 8924 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/sda1 1 7417 59577021 83 Linux
/dev/sda2 7418 8924 12104977+ 83 Linux

# cat /proc/partitions
major minor #blocks name

3 0 60051600 hda
3 1 409626 hda1
3 2 10482412 hda2
3 3 10482412 hda3
3 4 1 hda4
3 5 10482381 hda5
3 6 2096451 hda6
3 7 2096451 hda7
3 8 2096451 hda8
8 0 71687402 sda

Thanks
-Jag