30 Sep
2004
30 Sep
'04
9:40 a.m.
----- Original Message -----
From: "Antonio Carlini" <a.carlini(a)ntlworld.com>
To: "'General Discussion: On-Topic and Off-Topic Posts'"
<cctalk(a)classiccmp.org>
Sent: Thursday, September 30, 2004 3:54 PM
Subject: RE: Need to know DDS drive used to write backup tapes
DDS3 is 125M, 120M is DDS2 correct?
DDS1 tapes are 90M
If the cartridges (note correct USian
spelling) have a tape length
Is there a non Usian spelling?
printed on them that will tell you whether
they're 1GB, 2GB,
etc. Most
DDS drives will read, if not write, older formats. IOW a DDS3 drive
should rad a DDS1 tape.
Indeed. The thing not to do is put a DDS3 (or DDS2) DAT tape in
a DDS1 drive. At least not if the drive is a TLZ04 since you
will "significantly" degrade the head's lifetime. I never
found out how significant "significant" is. The problem is
that tapes longer than 60m were designed to be used on drives
that wrapped them around the heads at a different angle, so
the tapes are different. The difference is enough to wear
the TLZ04 head much more than is acceptable. I do not know
whether dropping a 120m tape (DDS3) into a TLZ06 (DDS2 drive)
will have similar effects.
So be careful out there!
Antonio
--
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Antonio Carlini arcarlini(a)iee.org