Bad blocks on optical disks????

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4 total messages Started by Per Knudsgaard Tue, 17 Nov 1992 20:08

#1842

Author: Per Knudsgaard
Date: Tue, 17 Nov 1992 20:08

8 lines
800 bytes

   Hi,

   Here at Aarhus University, we have one 'oldish' NeXT-cube. A few of the optical disks
we have, have developed bad blocks. The technical staff cleaned the drive, and when that
did not work, they basically gave up. What can I do, if I want to salvage some of the
data on these disks?

   Per Knudsgaard, knude@daimi.aau.dk

Re: Bad blocks on optical disks????

#1873

Author: Michael Bruewer mib
Date: Thu, 19 Nov 1992 10:21

23 lines
1214 bytes

In article <1992Nov17.200804.25406@daimi.aau.dk> knude@daimi.aau.dk (Per  
Knudsgaard) writes:
>    Hi,
> 
>    Here at Aarhus University, we have one 'oldish' NeXT-cube. A few of the  
optical disks
> we have, have developed bad blocks. The technical staff cleaned the drive,  
and when that
> did not work, they basically gave up. What can I do, if I want to salvage  
some of the
> data on these disks?
> 
>    Per Knudsgaard, knude@daimi.aau.dk

Try fsck -b16 /dev/od0a

Bye, Michael.
_________________________________________________________________
Michael Bruewer

e-mail: mib@bio128.uni-bielefeld.de
 
Universitaet Bielefeld

Re: Bad blocks on optical disks????

#1891

Author: David Lemson
Date: Fri, 20 Nov 1992 07:59

11 lines
918 bytes

(Michael Bruewer)mib@bio128.uni-bielefeld.de  writes:

>Try fsck -b16 /dev/od0a

Unless I am mistaken, you must always use the raw device with fsck,
so you must say 'fsck /dev/rod0a'.
-- 
David Lemson                                                (217) 244-1205
University of Illinois NeXT Campus Consultant / CCSO NeXT Lab System Admin
Internet : lemson@uiuc.edu                UUCP :...!uiucuxc!uiucux1!lemson 
NeXTMail accepted                                  BITNET : LEMSON@UIUCVMD

Re: Bad blocks on optical disks????

#1918

Author: Mike Matthews
Date: Sat, 21 Nov 1992 21:23

21 lines
1356 bytes

In article <By08v7.BJL@ux1.cso.uiuc.edu> lemson@ux1.cso.uiuc.edu (David Lemson) writes:
>Unless I am mistaken, you must always use the raw device with fsck,
>so you must say 'fsck /dev/rod0a'.

Nope.  In the man pages:

     Checking the raw device is almost always faster.

You *want* to use the raw device, but you don't *have* to...

>David Lemson
------
Mike Matthews, matthews@oberon.umd.edu (NeXTmail accepted)
------
The day will come when the mystical generation of Jesus, by the Supreme Being
as his Father, in the womb of a virgin will be classified with the fable of
the generation of Minerva in the brain of Jupiter.  But we may hope that the
dawn of reason and freedom of thought in these United States will do away with
this artificial scaffolding and restore to us the primitive and genuine
doctrines of this most venerated Reformer of human errors.
- Thomas Jefferson

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