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- Path: sparky!uunet!olivea!sgigate!odin!fido!zola!zuni!anchor!olson
- From: olson@anchor.esd.sgi.com (Dave Olson)
- Newsgroups: comp.sys.sgi
- Subject: Re: opticals and fx
- Message-ID: <njget7g@zuni.esd.sgi.com>
- Date: 22 Jul 92 01:43:21 GMT
- References: <31479@adm.brl.mil>
- Sender: news@zuni.esd.sgi.com (Net News)
- Organization: Silicon Graphics, Inc. Mountain View, CA
- Lines: 43
-
- In <31479@adm.brl.mil> steve@chaos.ocean.fsu.edu (Steve Van Gorder) writes:
-
- | More optical disk problems, this time with fx.
- |
- | Can anyone help me with some problems I'm having with my optical disk
- | and fx. Below is a session where I am exercising the disk in extended mode.
- | During the first exercise fx just hangs. I retry I again and even though
- | there are apparently some errors during the exercise, fx errlog reports none
- | and there are no new bad blocks found.
- |
- | ..... 290.......... 300.......... 310.......... 320.......... 330.......... 340
- | .......... 350.......... 360.dks0d5s10: Media error: No addr mark found in Data field,. Block #347122
- |
- | (fx locks up and in SYSLOG we find)
-
- It isn't locking up, it is trying to find the block that was bad, one
- block at a time, because some drives don't report the actual block in
- error. A (minor :) bug on my part made this take far longer than
- it should have, but it will eventually find it or give up. If you
- start fx with -r0, it won't retry before looking for the bad block,
- which will speed things up. 4.0.5 fx has the bug fixed.
-
- | Jul 20 17:49:59 chaos unix: dks0d5s10: Media error: No addr mark found in Data \field,. Block #347122
-
- Not surprising they match, it is a kernel message that is displayed
- on the console, and logged via syslogd.
-
- | .......... 910.......... 920.......... 930.........dks0d5s10: Media error: Unrecovered data block read error,. Block #902359
- | fx/exercise/complete: Error 0 -- Couldn't find bad block on track starting with block 901440 after 2 tries
-
- Tends to indicate a transient error, which for optical disks usually
- indicates that the drive is running too hot.
-
- | ----- error summary-----
- | (bn) rretries(rfail) wretries/wfail
- | TOTAL ERR BLOCKS r0(0 hard) w0(0 hard)
-
- Hmm; the soft error count for reads should have been non-zero here;
- I haven't seen that problem before.
- --
- Let no one tell me that silence gives consent, | Dave Olson
- because whoever is silent dissents. | Silicon Graphics, Inc.
- Maria Isabel Barreno | olson@sgi.com
-