USB heartach

Hi All

Hope you can shed some light on this.

System is a AMD 4800+ XP Sp3

Drive C Samsund IDE 250Gb
Drive D Lasie 1Tb big disk (for bulk storage)
Drive E Seagate 75Gb freeagent USB only (for backups)

All driven through a powered via 6 USB 2.0 hub

Drive D has started to disappear from Disk Management this can be while down loading from the net or doing back up.
Its been working fine for over a year. (see event logs below)

Also and I'm not sure if it is connected. The Lacie 250Gb i removed now does not work. It just keeps spinning
and is recognised by by my desktop or our laptops. Lacie say it is power supply problem but I'm less than convinced.

Hope some one can help

All the best
-----------------------------------------------------------------------------------------------------------------------------------------------------
Event Type: Warning
Event Source: Disk
Event Category: None
Event ID: 51
Date: 13/10/2009
Time: 15:48:25
User: N/A
Computer: DERF
Description:
An error was detected on device \Device\Harddisk1\D during a paging operation.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
Data:
0000: 03 00 68 00 01 00 b6 00 ..h...¶.
0008: 00 00 00 00 33 00 04 80 ....3..€
0010: 2d 01 00 00 00 00 00 00 -.......
0018: 00 00 00 00 00 00 00 00 ........
0020: 00 00 00 00 00 00 00 00 ........
0028: 56 1e 02 00 00 00 00 00 V.......
0030: ff ff ff ff 03 00 00 00 ÿÿÿÿ....
0038: 40 00 00 49 00 00 00 00 @..I....
0040: 00 20 0a 12 48 02 20 40 . ..H. @
0048: 00 40 00 00 0a 00 00 00 .@......
0050: 00 00 00 00 90 0e 40 89 .....@‰
0058: 00 00 00 00 70 ed 84 88 ....p턈
0060: 00 00 00 00 9f 52 85 3c ....ŸR…<
0068: 28 00 3c 85 52 9f 00 00 (.<…RŸ..
0070: 20 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 ........
-----------------------------------------------------------------------------------------------------------------------------------------------------
ALSO

Event Type: Warning
Event Source: Ftdisk
Event Category: Disk
Event ID: 57
Date: 13/10/2009
Time: 13:49:57
User: N/A
Computer: DERF
Description:
The system failed to flush data to the transaction log. Corruption may occur.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
Data:
0000: 00 00 00 00 01 00 be 00 ......¾.
0008: 02 00 00 00 39 00 04 80 ....9..€
0010: 00 00 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 ........
-----------------------------------------------------------------------------------------------------------------------------------------------------
AND
Event Type: Warning
Event Source: Ntfs
Event Category: None
Event ID: 50
Date: 13/10/2009
Time: 13:49:53
User: N/A
Computer: DERF
Description:
{Delayed Write Failed} Windows was unable to save all the data for the file . The data has been lost. This error may be caused by a failure of your computer hardware or network connection. Please try to save this file elsewhere.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
Data:
0000: 04 00 04 00 02 00 52 00 ......R.
0008: 00 00 00 00 32 00 04 80 ....2..€
0010: 00 00 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: 0e 00 00 c0 ...À
Event Type: Warning
Event Source: Ntfs
Event Category: None
Event ID: 50
Date: 13/10/2009
Time: 13:49:53
User: N/A
Computer: DERF
Description:
{Delayed Write Failed} Windows was unable to save all the data for the file . The data has been lost. This error may be caused by a failure of your computer hardware or network connection. Please try to save this file elsewhere.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
Data:
0000: 04 00 04 00 02 00 52 00 ......R.
0008: 00 00 00 00 32 00 04 80 ....2..€
0010: 00 00 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: 0e 00 00 c0 ...À
-----------------------------------------------------------------------------------------------------------------------------------------------------

Good point.
I'm trying to get all the non physical movement options out of the way first and I am going to start moving stuff around next week If I cant fix it in the XP set up. It is so tangled and dusty down behind my PC, I leave it to my son.