Re: Intermittent read errors from SATA HD.

Tech-Archive recommends: Repair Windows Errors & Optimize Windows Performance

From: Colin Barnhorst (colinbarharst_at_msn.com)
Date: 10/18/04 

Date: Sun, 17 Oct 2004 18:33:09 -0600

You might try the microsoft.public.windowsxp.hardware newsgroup. 

-- 
What's another word for synonym?
"Cataleptic" <cat.the.mess@ihug.co.nz> wrote in message 
news:WTDcd.115$HD2.81050@news.xtra.co.nz...
> I'm getting intermittent read errors when reading large files from a 160G 
> SATA drive hooked up to my P4P800 motherboard. They don't happen at the 
> same location on any given file, and the happen relatively infrequently. 
> I've tried swapping cables and updating drives, and I've got to the point 
> where I'm almost certain that it's the drive itself.
>
> To verify this, I wrote a small program that reads in 2MB chunks from a 
> given file, and stores a checksum for that chunk. Then it re-reads those 
> chunks and compares the new checksum with the old one. Unforuntately, I 
> have 1GB of RAM, which means the OS seems to maintain a read-buffer a good 
> 200MB or more, so the target file has to be at least twice that to ensure 
> that the data being checked has not been cached. On a 1G test file, 
> checksums mismatch about once every 4 or 5 passes.
>
> Obviously, I need to be able to reliably recover the data on the faulty 
> drive before I return it. To do that, I need one (or more) of the 
> following:
>
> 1. An App or some API calls that allow me to bypass or clear the 
> read-cache.
>
> 2. An App or some API calls that let me set the size of the read-cache to 
> something nice and small, say 4MB or less. I've tried CacheManXP and 
> CacheSet
>
> 3. A data recovery app that can bypass the cache and 
> double/triple/quadruple check the data it reads before saving it.
>
> If anyone could help me, I'd be most grateful.
>
>
> -- 
> Remove the mess to reply.

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