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From: bill@iccdev.indcomp.com (Bill Gaines)
Newsgroups: comp.sys.hp
Subject: Re: Rewritable optical disk performance
Message-ID: <550@iccdev.indcomp.com>
Date: 28 Jun 90 12:11:52 GMT
References: <19060@orstcs.CS.ORST.EDU> <7370161@hpfcso.HP.COM> <1990Jun27.071237.7621@abblund.se>
Organization: Industrial Computer Corp., Atlanta, GA
Lines: 24

nick@abblund.se writes:


>Has anyone bought a rewritable optical disk from HP? Are
>you happy with it?

>We bought one a few weeks ago and use it for backup, among other
>things. According to HP figures on backup rates, the backup rate
>to an optical disk is about 900 MBytes per hour. Our experience
>is that it takes roughly 4 hours to back up a 300 MByte disk,
>i.e. 75 MBytes per hour. We have asked HP about this several times,
>but nobody seemed to know anything. We use cpio to do backups, exactly
>as recommended in the manual. Are we doing anything wrong? Does
>anyone else have similar or different experiences?

We noticed the same thing about ours.  However, when we finally looked
in the back of the manual for the drive we found that it writes 4 times
slower than it reads.  We have noticed that reading information is very
acceptable on this drive, but writing is very slow.

-- 
Bill Gaines
Industrial Computer Corp.
bill@iccdev.indcomp.com (...!gatech!iccdev!bill)