VSS Failed to make shadow copy with Event ID 12310 "Timed out" on SBS server 2003

Server specs:
Intel SSR212MC2R Storage server
Using onboard SATA RAID for OS, 2 x 120GB 2.5" Seagate HDs RAID1
8 x 1TB Seagate drives in RAID5 for storage on an SRCSAS144E Intel RAID Controller

Windows disk configuration
Disk0: OS Drive
Disk1: Storage array, dynamic volume of 6.5TB total space.

I would like to enable shadow copies for the data on Disk1, however, every time a shadow copy is attempted, I get this event in the Application log:

Event Type:      Error
Event Source:      VSS
Event Category:      None
Event ID:      12310
Date:            2/12/2008
Time:            10:52:48 AM
User:            N/A
Computer:      WBOC-DATA
Description:
Volume Shadow Copy Service error: The shadow copy could not be committed - operation timed out. Error context: DeviceIoControl(\\?\Volume{3a5fc759-74df-4857-b60e-43aaad4f5834} - 00000178,0x0053c010,000377A8,0,000387B0,4096,[0]).

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
Data:
0000: 2d 20 43 6f 64 65 3a 20   - Code:
0008: 49 4e 43 49 43 48 4c 48   INCICHLH
0010: 30 30 30 30 30 34 35 39   00000459
0018: 2d 20 43 61 6c 6c 3a 20   - Call:
0020: 53 50 52 51 53 4e 50 43   SPRQSNPC
0028: 30 30 30 30 30 32 33 35   00000235
0030: 2d 20 50 49 44 3a 20 20   - PID:  
0038: 30 30 30 30 33 37 31 36   00003716
0040: 2d 20 54 49 44 3a 20 20   - TID:  
0048: 30 30 30 30 35 35 31 36   00005516
0050: 2d 20 43 4d 44 3a 20 20   - CMD:  
0058: 43 3a 5c 57 49 4e 44 4f   C:\WINDO
0060: 57 53 5c 53 79 73 74 65   WS\Syste
0068: 6d 33 32 5c 73 76 63 68   m32\svch
0070: 6f 73 74 2e 65 78 65 20   ost.exe
0078: 2d 6b 20 73 77 70 72 76   -k swprv
0080: 2d 20 55 73 65 72 3a 20   - User:
0088: 4e 54 20 41 55 54 48 4f   NT AUTHO
0090: 52 49 54 59 5c 53 59 53   RITY\SYS
0098: 54 45 4d 20 20 20 20 20   TEM    
00a0: 2d 20 53 69 64 3a 20 20   - Sid:  
00a8: 53 2d 31 2d 35 2d 31 38   S-1-5-18

Followed by:
Event Type:      Error
Event Source:      VSS
Event Category:      None
Event ID:      7001
Date:            2/12/2008
Time:            10:52:48 AM
User:            N/A
Computer:      WBOC-DATA
Description:
VssAdmin: Unable to create a shadow copy: The shadow copy provider had an error. Please see the system and application event logs for more information.
Command-line: 'C:\WINDOWS\system32\vssadmin.exe Create Shadow /AutoRetry=5 /For=\\?\Volume{3a5fc759-74df-4857-b60e-43aaad4f5834}\'.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
Data:
0000: 2d 20 43 6f 64 65 3a 20   - Code:
0008: 41 44 4d 56 41 44 4d 43   ADMVADMC
0010: 30 30 30 30 30 38 32 38   00000828
0018: 2d 20 43 61 6c 6c 3a 20   - Call:
0020: 41 44 4d 56 41 44 4d 43   ADMVADMC
0028: 30 30 30 30 30 37 36 38   00000768
0030: 2d 20 50 49 44 3a 20 20   - PID:  
0038: 30 30 30 30 35 37 39 32   00005792
0040: 2d 20 54 49 44 3a 20 20   - TID:  
0048: 30 30 30 30 35 33 30 30   00005300
0050: 2d 20 43 4d 44 3a 20 20   - CMD:  
0058: 43 3a 5c 57 49 4e 44 4f   C:\WINDO
0060: 57 53 5c 73 79 73 74 65   WS\syste
0068: 6d 33 32 5c 76 73 73 61   m32\vssa
0070: 64 6d 69 6e 2e 65 78 65   dmin.exe
0078: 20 43 72 65 61 74 65 20    Create
0080: 53 68 61 64 6f 77 20 2f   Shadow /
0088: 41 75 74 6f 52 65 74 72   AutoRetr
0090: 79 3d 35 20 2f 46 6f 72   y=5 /For
0098: 3d 5c 5c 3f 5c 56 6f 6c   =\\?\Vol
00a0: 75 6d 65 7b 33 61 35 66   ume{3a5f
00a8: 63 37 35 39 2d 37 34 64   c759-74d
00b0: 66 2d 34 38 35 37 2d 62   f-4857-b
00b8: 36 30 65 2d 34 33 61 61   60e-43aa
00c0: 61 64 34 66 35 38 33 34   ad4f5834
00c8: 7d 5c 20 20 20 20 20 20   }\      
00d0: 2d 20 55 73 65 72 3a 20   - User:
00d8: 4e 54 20 41 55 54 48 4f   NT AUTHO
00e0: 52 49 54 59 5c 53 59 53   RITY\SYS
00e8: 54 45 4d 20 20 20 20 20   TEM    
00f0: 2d 20 53 69 64 3a 20 20   - Sid:  
00f8: 53 2d 31 2d 35 2d 31 38   S-1-5-18

I've only ever made one successful shadow copy almost a month ago, but have not been able since then, with this error.