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Path: utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!rutgers!bellcore!tness7!texbell!sugar!ficc!uunet!mcvax!ukc!stc!idec!prlhp1!ockenden
From: ockenden@prlhp1.prl.philips.co.uk (Paul T Ockenden)
Newsgroups: comp.os.vms,comp.sys.dec
Subject: Error count on TK50s
Keywords: TK50
Message-ID: <654@prlhp1.prl.philips.co.uk>
Date: 12 Oct 88 19:06:15 GMT
Organization: There is no organization here
Lines: 33

We've just a very interesting conversation with DEC (here in the UK)
after one of our TK50 drives went wrong (for about the 6th time in
2 years).

We noticed that we were getting a fairly high error count, even on the
new drive the engineer just installed, so we 'phoned round various DEC
departments to find out what the acceptable error rate for TK50s was...

DEC say that it's normally 50-72 (don't ask me how they got 72!!) for a
TK50, and 'anything over 100' for TK70s...

Now whilst I realise that these are soft errors, and nearly always they
turn out to be recoverable, the added processing (plus tape positioning)
involved in servicing 70 errors must increase the backup time considerably.
(or am I wrong ???)

What have DEC told other users for an acceptable error rate for TK drives ??


Incidentally....... While the DEC engineer was in fixing the TK50, he let
slip that he pays more visits to clients fixing the 'supposedly' more
reliable TK70 drives than he does TK50s.... As TK70s are fairly new to
the UK, and as we've got one on order, can anyone comment for me on just
how reliable they are ???

	Thanks...
.

-- 
Paul Ockenden                          uucp : ....uunet!prlb2!prlhp1!ockenden
Software type person                            ....mcvax!ukc!prlhp1!ockenden
Somewhere in England.                       janet : ockenden%prlhp1@uk.ac.ukc
"Blah blah blah......... (Pizza Killers!)"        bix : paulock   cix : PaulO