English Amiga Board


Go Back   English Amiga Board > Support > support.Other

 
 
Thread Tools
Old 27 March 2011, 15:55   #1
shirsch
Zone Friend
 
Join Date: Jun 2006
Location: Burlington, VT USA
Posts: 34
Tip: Salvaging AmigaOS 3.9 CD-ROM

It turns out that my Amiga OS 3.9 CD was burned on CD+RW media of very questionable quality. I noticed it was getting flakey and decided to make an archival copy before it was too late. Unfortunately, it _was_ too late and none of my Linux mastering tools were able to successfully read an image.

Since I was able to mount the ISO filesystem and read the directory, I tried a recursive file-level copy to the local disk. Fortunately, all the bad sectors were associated with the .avi files under /Videos (which I could care less about).

Next move was to master a new ISO image from the captured files. This involved some serious hair-pulling, since a number of the locale files had UTF-8 characters that gave k3b fits. The worst problem was that files starting with '.' were being dropped. The /.backdrop file is essential for properly mounting and presenting the recovery image as a separate pseudo-volume in the Workbench.

To make a long story short, this command line approach finally worked. When the resulting ISO image is burned, it appears to mount correctly and function as the original disc. Naturally the multi-media track (CDDA) is missing but I don't think this affects its use for installation and upgrade.

The magic incantation:

genisoimage -o AmigaOS39.iso -ldots -l -R -V AmigaOS3.9 <dir>

Where <dir> is the root of the copied files.

Hope this saves someone else the grief I went through!

Steve
shirsch is offline  
Old 27 March 2011, 17:46   #2
adolescent
Powered by Motorola

 
Join Date: Feb 2002
Location: Redondo Beach, CA
Age: 48
Posts: 1,064
You need at least one of the .AVI files for the BoingBag install security check.

Either way, wouldn't it just be easier to find an ISO somewhere out on the internet? BTW, where did you get OS 3.9 on CD+RW? Sounds kind of shady.
adolescent is offline  
Old 27 March 2011, 18:59   #3
shirsch
Zone Friend
 
Join Date: Jun 2006
Location: Burlington, VT USA
Posts: 34
Quote:
Originally Posted by adolescent View Post
You need at least one of the .AVI files for the BoingBag install security check.
I figured as much. Two of them copied and I left the others as zero-length dummies.

Quote:
Either way, wouldn't it just be easier to find an ISO somewhere out on the internet? BTW, where did you get OS 3.9 on CD+RW? Sounds kind of shady.
Not shady at all. This was purchased from Software Hut - an authorized distributor. The issue has been covered before in online discussions. They shipped a large number of official CDs in this format and I'm not the only one with a legitimate CD-RW.

And, yes, I'd love to find an uncorrupted image. However, I have zero luck finding such things among 100s of dead torrents and .ru websites that want my credit card number to approve downloads :-)

I do plan to contact the vendor, but have little expectation they will be willing to replace the CD.
shirsch is offline  
Old 13 May 2011, 20:33   #4
Mike55
Registered User
 
Join Date: Aug 2010
Location: Montgomery / USA
Posts: 10
Smile

I have 2 ORIGINAL 3.9 CDs. Let me know if you would like one.
Mike55 is offline  
Old 14 May 2011, 01:11   #5
wanderer
I want an A1000

wanderer's Avatar
 
Join Date: Sep 2004
Location: Pac-Land
Posts: 670
You could try IsoBuster. It has a very smart recovery feature, which allows you to read the disc and complete the recovery on multiple CD/DVD/BD drives, on different computers. It is quite common for some drives to be able to read through errors other drives cannot.
wanderer is offline  
Old 14 May 2011, 04:32   #6
Minuous
Coder/webmaster/gamer
Minuous's Avatar
 
Join Date: Oct 2001
Location: Canberra/Australia
Posts: 1,987
Quote:
Originally Posted by shirsch View Post
Next move was to master a new ISO image from the captured files. This involved some serious hair-pulling, since a number of the locale files had UTF-8 characters that gave k3b fits.
Not really UTF-8, just ISO-8859-1 (Latin 1).

Quote:
The worst problem was that files starting with '.' were being dropped. The /.backdrop file is essential for properly mounting and presenting the recovery image as a separate pseudo-volume in the Workbench.
Sounds like the tool you are using for this has a lot of bugs, maybe you should report these so they can be fixed?
Minuous is offline  
Old 14 May 2011, 09:05   #7
Hewitson
Registered User
Hewitson's Avatar
 
Join Date: Feb 2007
Location: Melbourne, Australia
Age: 36
Posts: 3,328
Not a bug, in Unix-like OS's files/dirs beginning with a . are hidden. I am sure the software would have a setting regarding these.
Hewitson is offline  
 


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Similar Threads
Thread Thread Starter Forum Replies Last Post
AmigaOS 3.9 BB ROM Update Error & Ram-Handler Not Updating 44.24 crazyegg support.Apps 23 10 November 2010 21:03
Tip for Lionheart Groundhog project.WHDLoad 2 08 June 2008 11:47
Amikit AmigaOS ROM Update Amigan Amiga scene 10 21 April 2008 22:30
Salvaging RAM! Smiley support.Hardware 2 25 February 2005 21:32
Salvaging bad disks via emulator? DPainter support.WinUAE 1 17 November 2001 00:10

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +2. The time now is 16:48.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.
Page generated in 0.06736 seconds with 15 queries