Repairing real Amiga (hard) disks on E-UAE

macce2 · 21 July 2007, 22:53

Has anyone tried this ?

Just installed E-UAE on XUbuntu Linux (x86).

If I just attach a hard drive with corrupted Amiga disk,
could it perhaps be repaired, running Disksalv etc.
under emulation ?

Secondly, I'd appreciate if Disksalv4 could be uploaded to the Z ?

For that kind of testing purposes ;-)

ps. That drive I'm trying to repair, has os3.9 installed.

cronos · 22 July 2007, 11:49

I don't know if you can repair a corrupted HD using an emulator. But, since I have disksalv4, I'll upload to the Z for you.

I prefer to use Quarterback Tools for repairing HDs.

macce2 · 22 July 2007, 17:10

@cronos

Ok, thank you for your help!

However, I'd really like to do that repairing process on a pc, because of my shortage of Amiga processing power and memory :-)

Toni Wilen · 22 July 2007, 17:36

I recommend making full image file ("rdb hdf") (for example with dd) and experiment with it first (no danger for corrupting the original drive more)

Jope · 23 July 2007, 13:31

I'm on the same lines with Toni ..

I've actually done some recovery work on a bunch of SyQuest cartridges using WinUAE and disk images.. They were missing RDB's so I hex edited the partition contents to separate files and added those as HDFs, then salvaged the data. IIRC I also did some RDB experiments to try and get the partitions aligned properly for some disks.

If your disk has a working RDB, do as Toni suggested...

Anyway, always make a work image first when doing computer forensics. Keep the original drive in it's original state until you're ready to copy the stuff back. You might want to make sure that the disk isn't broken physically before you write back, though.

macce2 · 23 July 2007, 16:05

@Jope and Toni

How on earth do I make such an image of my hard drive ..?

What kind of program do I need ?

I only know, how to make images of floppy disks.. ;-) (transadf)

OddbOd · 23 July 2007, 19:10

Every Linux distro includes the dd command (which Toni referred to above) which can be used to image drives, the tricky bit is knowing what the drive is called, there are probably 10 different ways of doing this but here's what I would do.

First open a shell and run

Code:

ls -alr /dev/disk/by-id

which should give you a list of all your disks and partitions, look for the line that contains the model of the Amiga formatted hard disk ignoring any lines that end with part1/part2/etc. the line will end with something like ../../sda or ../../hdb the letters at the end are the device node of the disk so assuming sda is the correct disk you would use

Code:

dd if=/dev/sda of=/home/macce2/amigahdd bs=16k

to obtain your image, note that you will have to run it as root, normal users don't have direct access to devices.

Edit: I've now actually tried this for myself with both the hard drive and ZIP-100 from my A2000, imaging with dd worked perfectly and the resulting files worked fine with E-UAE (and WinUAE FWIW).

Jope · 23 July 2007, 19:13

Use a Linux boot CD and use dd?

You could also try http://uranus.it.swin.edu.au/~jn/lin...rite/index.htm and use the path to the raw hd as dd's if parameter (check your winuae.log).

21 July 2007, 22:53	#1
macce2 Retro maniac Join Date: May 2005 Location: Finland Age: 49 Posts: 1,220	Repairing real Amiga (hard) disks on E-UAE Has anyone tried this ? Just installed E-UAE on XUbuntu Linux (x86). If I just attach a hard drive with corrupted Amiga disk, could it perhaps be repaired, running Disksalv etc. under emulation ? Secondly, I'd appreciate if Disksalv4 could be uploaded to the Z ? For that kind of testing purposes ;-) ps. That drive I'm trying to repair, has os3.9 installed.

23 July 2007, 19:10	#7
OddbOd Registered User Join Date: Jul 2005 Location: Australia Age: 46 Posts: 666	Every Linux distro includes the dd command (which Toni referred to above) which can be used to image drives, the tricky bit is knowing what the drive is called, there are probably 10 different ways of doing this but here's what I would do. First open a shell and run Code: ls -alr /dev/disk/by-id which should give you a list of all your disks and partitions, look for the line that contains the model of the Amiga formatted hard disk ignoring any lines that end with part1/part2/etc. the line will end with something like ../../sda or ../../hdb the letters at the end are the device node of the disk so assuming sda is the correct disk you would use Code: dd if=/dev/sda of=/home/macce2/amigahdd bs=16k to obtain your image, note that you will have to run it as root, normal users don't have direct access to devices. Edit: I've now actually tried this for myself with both the hard drive and ZIP-100 from my A2000, imaging with dd worked perfectly and the resulting files worked fine with E-UAE (and WinUAE FWIW). Last edited by OddbOd; 25 July 2007 at 21:47.

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22 July 2007, 11:49	#2
cronos Registered User Join Date: Apr 2005 Location: Melbourne/Australia Age: 47 Posts: 62	I don't know if you can repair a corrupted HD using an emulator. But, since I have disksalv4, I'll upload to the Z for you. I prefer to use Quarterback Tools for repairing HDs.

22 July 2007, 17:10	#3
macce2 Retro maniac Join Date: May 2005 Location: Finland Age: 49 Posts: 1,220	@cronos Ok, thank you for your help! However, I'd really like to do that repairing process on a pc, because of my shortage of Amiga processing power and memory :-)

22 July 2007, 17:36	#4
Toni Wilen WinUAE developer Join Date: Aug 2001 Location: Hämeenlinna/Finland Age: 49 Posts: 26,518	I recommend making full image file ("rdb hdf") (for example with dd) and experiment with it first (no danger for corrupting the original drive more)

23 July 2007, 13:31	#5
Jope - Join Date: Jul 2003 Location: Helsinki / Finland Age: 43 Posts: 9,864	I'm on the same lines with Toni .. I've actually done some recovery work on a bunch of SyQuest cartridges using WinUAE and disk images.. They were missing RDB's so I hex edited the partition contents to separate files and added those as HDFs, then salvaged the data. IIRC I also did some RDB experiments to try and get the partitions aligned properly for some disks. If your disk has a working RDB, do as Toni suggested... Anyway, always make a work image first when doing computer forensics. Keep the original drive in it's original state until you're ready to copy the stuff back. You might want to make sure that the disk isn't broken physically before you write back, though.

23 July 2007, 16:05	#6
macce2 Retro maniac Join Date: May 2005 Location: Finland Age: 49 Posts: 1,220	@Jope and Toni How on earth do I make such an image of my hard drive ..? What kind of program do I need ? I only know, how to make images of floppy disks.. ;-) (transadf)

23 July 2007, 19:13	#8
Jope - Join Date: Jul 2003 Location: Helsinki / Finland Age: 43 Posts: 9,864	Use a Linux boot CD and use dd? You could also try http://uranus.it.swin.edu.au/~jn/lin...rite/index.htm and use the path to the raw hd as dd's if parameter (check your winuae.log).

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