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- Newsgroups: comp.sys.att
- Path: sparky!uunet!indetech!david
- From: david@indetech.com (David Kuder)
- Subject: Re: Dusty Machines
- Message-ID: <1992Jul30.221824.28973@indetech.com>
- Organization: Independence Technologies, Inc. Fremont, CA
- References: <COSC176T.92Jul15152442@menudo.uh.edu> <1992Jul16.024515.3308@spcvxb.spc.edu> <1992Jul23.203818.16799@cuuxb.att.com>
- Distribution: na
- Date: Thu, 30 Jul 1992 22:18:24 GMT
- Lines: 30
-
- In article <1992Jul23.203818.16799@cuuxb.att.com> of alt.folklore.computers
- fmcgee@cuuxb.UUCP (Frank W. McGee) writes:
- > The tape drive should be cleaned after every eight hours of use, and
- > after a new tape has been used (the new tape might deposit loose tape
- > debris on the tape heads).
-
- So the heads should be cleaned after every 4 or 5 uses for backup since
- a backup takes about 2 hours?
-
- > When Bell Labs tested tapes for the StarServer E here, they found the
- > following general tape life guidelines for complete full-length passes:
-
- >DC 6320 - 50 full-lenth passes
- >DC 6525 - 30 full-lenth passes (because of the thinner media)
- >DC 6150 - 40 full-lenth passes
- >DC 600A - 30 full-lenth passes
-
- So since filling a tape takes one full-length pass per track, we get
- about 4 or 5 uses per tape for backup before the tape should be
- decommisioned?
-
- Looks like the rule of thumb is:
- Use the tape for a week of backing up, then clean the drive
- and decommission the tape.
-
- So anybody thinking about using QIC for backup better not have a lot
- to backup because the media cost will kill them.
- --
- David A. Kuder Nothing pithy today
- 510 438-2003 {uunet,sun,sharkey,pacbell}!indetech!david david@indetech.com
-