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Article #4976

Tape problem fixed!

#4976
From: Phil Hunt
Date: Thu, 21 Sep 1989 18:53
39 lines
1992 bytes
Hi,

Well, I finally solved my tape backup prblem.  To give a short description of
the problem:

I have a TEAC N50 (Macproduct 150 meg tape backup unit).  I couldn't get it to
work with Fastback II (Errors 110,120,150).  With retrospect, it eith hung after
60 or so meg or would give random I/O errors (Error -36), sometimes, it would
die with the error (Hardware error=203 tape speed too slow). 

Well, I returned the drive (It was brand new), got a new one back and it still
did it.

It turns out to be SCSI TERMINATION!!

My setup was as follows:

Mac---Internal Disk----External Disk---------Teac
      (Term built in)  (Term built in)       (NOT TERMINATED!)

So I had a device AFTER the last terminated device on the bus...Solution?
Move the Teac before the External HD......Works great now.

Drive is super fast,  Fastback II is 2.4 meg/minute (With compression),
Retrospect is 4-5meg/min (Without compression)...Oddly enough though,
FB II is only marginally faster with compression turned off (either off or
set to save time).

I still find it hard to believe 150+meg fits on a tape that looks exactly like a
phillips cassette!!!!

BTW,  Retrospect actually wrote 166 meg on a 150 meg tape.....
==================================================================
Phil Hunt                      "Wherever you go, there you are!!!"
Digital Equipment Corporation                 Phone: (508)486-2164 
ENET:        VAXPHW::PHIL
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From: phil@vaxphw.enet.dec.com (Phil Hunt)
Newsgroups: comp.sys.mac
Subject: Tape problem fixed!
Message-ID: <4877@shlump.nac.dec.com>
Date: 21 Sep 89 18:53:57 GMT
Sender: news@shlump.nac.dec.com
Organization: Digital Equipment Corporation
Lines: 39