This paper looks to be 5 years old (based on newest references it cites
- it actually cites others that go back nearly 10 years).  It would be
interesting to see his take on current deduplication offerings to see if
the other checks they contain over simple hashing were enough to allay
his concerns.

One thing I've not seen in all this discussion is anyone saying they've
actually experienced data loss as a result of commercial deduplication
devices.  Can anyone here claim that?

-----Original Message-----
From: veritas-bu-bounces AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of Austin
Murphy
Sent: Monday, October 22, 2007 10:47 AM
To: veritas-bu AT mailman.eng.auburn DOT edu
Subject: Re: [Veritas-bu] Tapeless backup environments

Here is some required reading on the topic from Val Henson, a noted
academic/storage-guru.

An Analysis of Compare-by-hash
www.nmt.edu/~val/review/hash.pdf

Of particular interst is why hardware error rates can't be compared
with deterministic software errors.

Austin
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