An error was detected on device \Device\Harddisk... during a paging operation

I have a problem with SBS 2003 server (the server has 2 x RAID1; OS is installed on the first RAID1 that is build using Dell SAS/5i controller; on the second RAID1 that is built using Adaptec SerialATA HostRaid Controller 1220SA are installed all the applications, i.e. Exchange and also the shares).

At some point this error is being logged:

Event Type:      Error
Event Source:      adp3132
Event Category:      None
Event ID:      9
Date:            25/11/2008
Time:            03:00:34
User:            N/A
Computer:      NBS-LON02-S01
Description:
The device, \Device\Scsi\adp31321, did not respond within the timeout period.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
Data:
0000: 00 00 10 00 01 00 68 00   ......h.
0008: 00 00 00 00 09 00 04 c0   .......À
0010: 01 01 00 50 00 00 00 00   ...P....
0018: 00 00 00 00 00 00 00 00   ........
0020: 00 00 00 00 00 00 00 00   ........
0028: 00 00 00 00 0b 00 00 00   ........
0030: 00 00 00 00 07 00 00 00   ........

Then there a lot of these errors:

Event Type:      Warning
Event Source:      Disk
Event Category:      None
Event ID:      51
Date:            25/11/2008
Time:            03:00:52
User:            N/A
Computer:      NBS-LON02-S01
Description:
An error was detected on device \Device\Harddisk1 during a paging operation.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
Data:
0000: 04 00 68 00 01 00 ba 00   ..h...º.
0008: 00 00 00 00 33 00 04 80   ....3..€
0010: 2d 01 00 00 0e 00 00 c0   -......À
0018: 00 00 00 00 00 00 00 00   ........
0020: 00 00 00 00 00 00 00 00   ........
0028: 68 8b 23 00 00 00 00 00   h‹#.....
0030: ff ff ff ff 01 00 00 00   ÿÿÿÿ....
0038: 40 00 00 08 20 00 0b 00   @... ...
0040: 4e 20 0a 12 82 03 20 40   N ..‚. @
0048: 00 00 00 00 78 00 00 00   ....x...
0050: 00 00 00 00 f0 6b d8 88   ....ðk؈
0058: 00 00 00 00 58 9a 35 8a   ....Xš5Š
0060: 50 f5 20 8b e7 cb ef 07   Põ ‹çËï.
0068: 2a 00 07 ef cb e7 00 00   *..ïËç..
0070: 03 00 00 00 00 00 00 00   ........
0078: 00 00 00 00 00 00 00 00   ........
0080: 00 00 00 00 00 00 00 00   ........
0088: 00 00 00 00 00 00 00 00   ........

Eventually the server needs to be rebooted as it stops responding.

Your advice is highly appreciated.

Kind regards,

Jay