Repair a damaged partition on a Macintosh G4

How to use TestDisk to recover lost partition
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wnlewis
Posts: 8
Joined: 04 Jul 2017, 05:06

Repair a damaged partition on a Macintosh G4

#1 Post by wnlewis » 22 Mar 2018, 23:35

I have a Seagate Barracuda 750 Gb hard disk that has 5 partitions. An accident with some OS 9 based software damaged the partition table.

This is the first time I am trying to use TestDisk. So far I've tried it but not sure I have used it correctly so I have not implemented the results.

I can send a screen shot of where things are right now.

I think that it would probably be better to start again with some guidance from people who have experience.

A response please.

Thanks, wnlewis

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wnlewis
Posts: 8
Joined: 04 Jul 2017, 05:06

Re: Repair a damaged partition on a Macintosh G4

#2 Post by wnlewis » 06 Apr 2018, 01:33

I used TestDisk to find the partitions.

Then I used pdisk to make a new partition table.

I checked the results with Drive Genius 2.

What I found was a very small partition that had not shown on TestDisk.

Each partition on the drive had an Apple_Space between one partition and the next.

I deleted the very small partition. However I was not able to delete one of the Apple_Spaces, so the disk does not yet function properly.

What should I do to get rid of the Apple_Space?

Thank you.

wnlewis

wnlewis
Posts: 8
Joined: 04 Jul 2017, 05:06

Re: Repair a damaged partition on a Macintosh G4

#3 Post by wnlewis » 06 Apr 2018, 02:04

Here is what I get from a quick search.

Desktop/testdisk-7.1-WIP/testdisk; exit
TestDisk 7.1-WIP, Data Recovery Utility, January 2018
Christophe GRENIER <grenier@cgsecurity.org>
https://www.cgsecurity.org

TestDisk will try to restart itself using the sudo command to get
root (superuser) privileges.

sudo may ask your user password, it doesn't ask for the root password.
Usually there is no echo or '*' displayed when you type your password.

Password:
TestDisk 7.1-WIP, Data Recovery Utility, January 2018
Christophe GRENIER <grenier@cgsecurity.org>
https://www.cgsecurity.org





TestDisk 7.1-WIP, Data Recovery Utility, January 2018
Christophe GRENIER <grenier@cgsecurity.org>
https://www.cgsecurity.org

Disk /dev/rdisk3 - 750 GB / 698 GiB - 1465149168 sectors
Partition Start End Size in sectors
>P HFS 263968 268224319 267960352 [OS X]
P HFS 268489712 536450063 267960352 [Untitled 2]
P HFS 536715456 804675807 267960352 [Untitled 3]
P HFS 804941200 1072901551 267960352 [Untitled 4]
P HFS 1073166944 1341127295 267960352 [Untitled 5]
P HFS 1341402192 1465148423 123746232






Structure: Ok. Use Up/Down Arrow keys to select partition.
Use Left/Right Arrow keys to CHANGE partition characteristics:
P=Primary D=Deleted
Keys A: add partition, L: load backup, T: change type,
Enter: to continue
HFS blocksize=2097152, 137 GB / 127 GiB

It appears that the last partition is too small by a very small amount.

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