Unfortunately this is not a kernel or complete memory dump, so the IRP structure that would show the driver path is missing. However, most mountmgr crashes are either (as crahak pointed out) a faulty hard disk, or, more commonly in this case, a faulty chipset or disk driver. I would update whatever chipset drivers you have installed, or any RAID controller drivers (if that's what's in use).
Also, in some occasions, I have seen Symantec Antivirus' symtdi.sys driver cause this bugcheck as well (again, if I had the IRP stack, I would be able to gather more info than just a minidump), so if you have Symantec Antivirus or Norton Antivirus installed, removal as a test would also be a good thing to try.
kd> !thread
GetPointerFromAddress: unable to read from 8055f534
THREAD 82bc58b8 Cid 0004.0018 Teb: 00000000 Win32Thread: 00000000 RUNNING on processor 0
IRP List:
Unable to read nt!_IRP @ 823453b8
Not impersonating
GetUlongFromAddress: unable to read from 8055f544
Owning Process 82bc87c0 Image: System
Attached Process N/A Image: N/A
ffdf0000: Unable to get shared data
Wait Start TickCount 22479709
Context Switch Count 338060
ReadMemory error: Cannot get nt!KeMaximumIncrement value.
UserTime 00:00:00.000
KernelTime 00:00:00.000
Start Address nt!ExpWorkerThread (0x804e4729)
Stack Init f7c09000 Current f7c08990 Base f7c09000 Limit f7c06000 Call 0
Priority 13 BasePriority 13 PriorityDecrement 0 DecrementCount 16
ChildEBP RetAddr Args to Child
f7c08860 80522325 0000007a c03de008 c000000e nt!KeBugCheckEx+0x1b (FPO: [Non-Fpo])
f7c08888 804fae18 8149f010 c03de008 f7802000 nt!MiWaitForInPageComplete+0x1c5 (FPO: [Non-Fpo])
f7c08900 804ec48a 2dd56860 f7802000 c03de008 nt!MiDispatchFault+0x2a3 (FPO: [Non-Fpo])
f7c08950 804e1ff1 00000000 f7802000 00000000 nt!MmAccessFault+0x5bc (FPO: [Non-Fpo])
f7c08950 f7801fff 00000000 f7802000 00000000 nt!KiTrap0E+0xcc (FPO: [0,0] TrapFrame @ f7c08968)
f7c089dc f7805de7 82b52f40 823453b8 00000103 MountMgr!MountMgrQueryDosVolumePath+0x3 (FPO: [Non-Fpo])
f7c089fc 804e3d77 82345428 82b52f5c 00000200 MountMgr!MountMgrDeviceControl+0xb7 (FPO: [Non-Fpo])
f7c08a0c 8052e753 000000c8 81ee7430 e2cd05e8 nt!IopfCallDriver+0x31 (FPO: [0,0,0])
f7c08c5c 805e7940 82b77e30 e2cd05e8 6e446f49 nt!IoVolumeDeviceToDosName+0x155 (FPO: [Non-Fpo])
f7c08cc0 80615429 81ee7430 00000001 00000001 nt!IopQueryNameInternal+0x92 (FPO: [Non-Fpo])
f7c08cf0 80519af7 81ee7430 f7c08d28 80556d10 nt!IoQueryFileDosDeviceName+0x2e (FPO: [Non-Fpo])
f7c08d2c 804e54ad 82bc81f0 80561b40 82bc58b8 nt!CcWriteBehind+0x12e (FPO: [Non-Fpo])
f7c08d74 804e47fe 82bc81f0 00000000 82bc58b8 nt!CcWorkerThread+0x126 (FPO: [Non-Fpo])
f7c08dac 8057dfed 82bc81f0 00000000 00000000 nt!ExpWorkerThread+0x100 (FPO: [Non-Fpo])
f7c08ddc 804fa477 804e4729 00000000 00000000 nt!PspSystemThreadStartup+0x34 (FPO: [Non-Fpo])
00000000 00000000 00000000 00000000 00000000 nt!KiThreadStartup+0x16