| From: | "Chad R(dot) Larson" <clarson(at)eldocomp(dot)com> |
|---|---|
| To: | Douglas Trainor <trainor(at)transborder(dot)org>, Tony Reina <reina(at)nsi(dot)edu> |
| Cc: | pgsql-admin(at)postgresql(dot)org |
| Subject: | Re: Tape/DVD Backup Suggestions? |
| Date: | 2002-07-19 17:38:06 |
| Message-ID: | 4.2.2.20020719103539.00a975a0@ecint.ecinet.com |
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| Thread: | |
| Lists: | pgsql-admin |
At 01:54 PM 7/18/02 , Douglas Trainor wrote:
>Because in reality tape drive heads can drift over time, so you might have
>drifted away from a non-proprietary setup, and then the effect is the same.
DLTs have a special "calibration" section at the head of the tape. Upon a
mount for read, the drive will re-read that section and scootch the head up
or down until it gets a good read. Another of the reasons the DLT
consortium claims a 30 year archival life.
-crl
--
Chad R. Larson (CRL22) chad(at)eldocomp(dot)com
Eldorado Computing, Inc. 602-604-3100
5353 North 16th Street, Suite 400
Phoenix, Arizona 85016-3228
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