This is a copy of a post I made at another forum with a possible solution. 

Id already tried all the usual things that have been suggested here. Like most people 
my main suspicion was the early power off problem - so to eliminate this I hot wired 
the PSU to provide power all the time and ignore the power off signal from the motherboard 
- and I still got the same corruption on reboot. 

After searching and trying numerous vaguely related patches and fixes from MS I came 
across Q331958 - 137GB ATAPI driver limit in XP (in all versions of XP upto and including 
SP1). Id noticed this before but as it said it only applied to Hibernate and kernal 
dumps I hadn't bothered installing it. 

To quote from MS "The ATAPI driver for Windows XP Service Pack 1 (SP1) does not use 
48-bit Logical Block Addressing (LBA) when it writes memory dump files or hibernation 
files. Additionally, the flush cache command is not issued to a large hard disk that 
has 48-bit LBA enabled when Windows XP enters standby or hibernation" 

However I thought I might as well install it - and so far after 10 reboots I havent 
had one chkdsk or any other sign of corruption. 

Either thats a 1 in a million coincidence or MS are being economical with the truth 
and the bug applies to ALL disk accesses. I was also under the impression that as 
most IDE Raid devices used virtual SCSI devices that these ATAPI problems shouldn't 
apply. 

For anyone thats interested in trying this -
http://support.microsoft.com/default.aspx?scid=kb;[LN];331958 

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