Re: Software to check file integrity ?
- From: "J. Clarke" <jclarke.usenet@xxxxxxxxxxxxxxxx>
- Date: Mon, 29 Aug 2005 07:43:14 -0400
fj wrote:
>
> "Neill Massello" <neillmassello@xxxxxxxxxxxxx> wrote in message
> news:1h20np6.1638yi0qq5y44N%neillmassello@xxxxxxxxxxxxxxxx
>> zjustice <zeroREMOVEnews2@xxxxxxxxxxx> wrote:
>>
>>> Is there a utility if you have concern over a HD to run against it to
>>> check
>>> all the files present to see if they're ok and readable ?
>>
>> Readable? Yes. OK? Not really. A utility can only read what's there; it
>> can't know what's supposed to be there. The only way to discover defects
>> in the content of a file, as opposed to its structure, is to compare it
>> to another copy known to be correct. an
> Right!
>
> For the OP, if the file is readable, it's high probablility that the file
> contents have not changed or become corrupted. I.e, you imagine that
> someone could create a utility that would change files such that chkdsk
> would see them as OK, but the contents were either changed or were
> corrupted - but the chances of that happening normally would be quite
> small.
A bad bit in RAM can corrupt files during a copy. I've seen it happen.
I've also seen a defective address line cause corruption during a copy. In
both cases the system ran quite reliably. Unfortunately the only way to
detect such a problem is by a direct comparison with the original.
--
--John
to email, dial "usenet" and validate
(was jclarke at eye bee em dot net)
.
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