BSOD on windows 2008 R2 server. Window shut down unexpectedly

in event log got windows shut down unexpectedly error. go minidump file server , below output got win debug. tried search hotfix found out there quiet few hot fix , not sure 1 applies our server. 

currently running windows 2008 r2 server service pack. idea or suggestion helpful. thank you. 

use '!findthebuild' command search target build information.
if build information available, run '!findthebuild -s ; .reload' set symbol path , load symbols.

module_name: rdbss

faulting_module: fffff8000404b000 nt

debug_flr_image_timestamp:  49e022b9

read_address: unable nt!mmspecialpoolstart
unable nt!mmspecialpoolend
unable nt!mmpoolcodestart
unable nt!mmpoolcodeend
 fffffa60028e221c 

current_irql:  0

faulting_ip: 
rdbss+4521c
fffffa60`028e221c ??              ???

customer_crash_count:  1

default_bucket_id:  driver_fault_server_minidump

bugcheck_str:  0xd1

last_control_transfer:  from fffff800040a286e fffff800040a2ad0

failed_instruction_address: 
rdbss+4521c
fffffa60`028e221c ??              ???


stack_command:  kb

followup_ip: 
rdbss+4521c
fffffa60`028e221c ??              ???

symbol_stack_index:  3

symbol_name:  rdbss+4521c

followup_name:  machineowner

image_name:  rdbss.sys

bucket_id:  wrong_symbols

followup: machineowner
---------

kd> lmvm rdbss
start             end                 module name
fffffa60`0289d000 fffffa60`028ea000   rdbss    t (no symbols)           
    loaded symbol image file: rdbss.sys
    image path: \systemroot\system32\drivers\rdbss.sys
    image name: rdbss.sys
    timestamp:        sat apr 11 00:55:21 2009 (49e022b9)
    checksum:         0004fc14
    imagesize:        0004d000
    translations:     0000.04b0 0000.04e4 0409.04b0 0409.04e4
kd> lmvm rdbss
start             end                 module name
fffffa60`0289d000 fffffa60`028ea000   rdbss    t (no symbols)           
    loaded symbol image file: rdbss.sys
    image path: \systemroot\system32\drivers\rdbss.sys
    image name: rdbss.sys
    timestamp:        sat apr 11 00:55:21 2009 (49e022b9)
    checksum:         0004fc14
    imagesize:        0004d000
    translations:     0000.04b0 0000.04e4 0409.04b0 0409.04e4
kd> lmvm nt
start             end                 module name
fffff800`0404b000 fffff800`04563000   nt       t (no symbols)           
    loaded symbol image file: ntoskrnl.exe
    image path: \systemroot\system32\ntoskrnl.exe
    image name: ntoskrnl.exe
    timestamp:        mon apr 02 09:48:22 2012 (4f79ae26)
    checksum:         0048031c
    imagesize:        00518000
    translations:     0000.04b0 0000.04e4 0409.04b0 0409.04e4
kd> lmvm nt
start             end                 module name
fffff800`0404b000 fffff800`04563000   nt       t (no symbols)           
    loaded symbol image file: ntoskrnl.exe
    image path: \systemroot\system32\ntoskrnl.exe
    image name: ntoskrnl.exe
    timestamp:        mon apr 02 09:48:22 2012 (4f79ae26)
    checksum:         0048031c
    imagesize:        00518000
    translations:     0000.04b0 0000.04e4 0409.04b0 0409.04e4

hello, 

>>>bugcheck_str:  0xd1

• for bug check has value of 0x000000d1 refer link once http://msdn.microsoft.com/en-us/library/windows/hardware/ff560244(v=vs.85).aspx
• as per above dump file analysis seems bsod occurs because of redirected drive buffering subsystem (rdbss.sys) driver.so here fix that, please refer:http://support.microsoft.com/kb/2584874

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regards, ravikumar p

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