AD Repair Possible? Event ID 474's

Event Type: Error
Event Source: NTDS ISAM
Event Category: Database Page Cache
Event ID: 474
Date: 7/16/2008
Time: 6:51:41 AM
User: N/A
Computer: SERVER1
Description:
NTDS (636) NTDSA: The database page read from the file
"C:\WINDOWS\NTDS\ntds.dit" at offset 19144704 (0x0000000001242000) for 8192
(0x00002000) bytes failed verification due to a page checksum mismatch. The
expected checksum was 3869564695 (0xe6a4df17) and the actual checksum was
3321945879 (0xc600df17). The read operation will fail with error -1018
(0xfffffc06). If this condition persists then please restore the database
from a previous backup. This problem is likely due to faulty hardware.
Please contact your hardware vendor for further assistance diagnosing the
problem.

For more information, see Help and Support Center at
http://go.microsoft.com/fwlink/events.asp.

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Currently, with the exception of all of these errors, everything seems fine.
I believe this was caused by a power outage where the UPS shutdown the
system and (maybe) the delay wasn't long enough to let SBS 2003 R2 shutdown
gracefully.

I can open AD Users & Computers and everything seems to be there (we only
have 6 users and 7 computers including the server). I can also open AD
sites, AD trusts. Exchange Manager also seems fine.

Our most recent backup of system state was 6/27/08, but it apparently did
not complete successfully. Previous successful system state backup is months
old.

Via Google I have seen reference to NTDSUtil and ESENTUTL, but wanted to ask
here before trying anything like that. If I'm not mistaken I have to reboot
to do those and I always hesitate to reboot a working system when things are
working.

Thanks in advance.


.

Relevant Pages

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    ... Nothing is working since the Backup will not complete without serious errors. ... option to use shadow copy and to verify? ... If I check System State and All files on C and D drives, ... Registration Database. ...
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