Disable HFS+ journaling from within Ubuntu

[Ancanus]

Hello,

I have an external hard drive with a single HFS+ partition on it. I'd like to shrink this partition to make room for other partitions. It is to my understanding that I need to disable the HFS journaling before proceeding, and that journaling may be disabled from within MAC OSX.

I do not have access to an OSX machine so I was wondering if it was possible to disable Journaling from within Ubuntu?


P.D: I would rather not wipe the whole hard drive and create the partitions from scratch.

Thanks.

[Ancanus]

I ended wiping the whole hard drive and creating partitions from scratch.

This would be a nice project. I mean, implementing disable journaling can't be that difficult. Perhaps it's just a boolean flag somewhere or something.

[Bladehawke]

It *can* be done. And there's code already written to do it. Please see http://dmunsie.wordpress.com/code/hacks/ and http://loquerasparalinux.blogspot.co...aling-sin.html for the particulars. In short, dmunsie wrote a brief C program for OSX that can change the necessary bits in the partition header and the second link points to a very simple patch to make it compile under linux along with instructions for use.

[Ancanus]

Thanks, Bladehawke!
This will be definitely useful in the future.

[rmtatum]

Using information from the following link, I removed all references CFSwapInt32HostToBig and its dependencies and substituted CFSwapInt32HostToBig with bswap_32.

The program compiled (albeit with warning messages).

To run the program, simply use

sudo ./a.out /dev/sdXX

where /dev/sdXX is the partition you need to mount.

Then you should be able to mount using the following

sudo mount -t hfsplus -o rw,user /dev/sdXX /media/hfspart

For your convenience, you may find the code at the following url:

http://pastebin.com/7rvxR38d

[kaar3l]

Cannot get it compiled:S

gcc -o disable_journal disable_journal.c
disable_journal.c: In function ‘main’:
disable_journal.c:31: warning: format ‘%8.8x’ expects type ‘unsigned int’, but argument 2 has type ‘long unsigned int’
/tmp/ccz3QZ1P.o: In function `main':
disable_journal.c:(.text+0xfe): undefined reference to `bswap_32'
disable_journal.c:(.text+0x14f): undefined reference to `bswap_32'
collect2: ld returned 1 exit status

[blink]

I tweaked the code to compile cleanly on ubuntu. The two line difference is highlighted in yellow on the pastebin link.

http://pastebin.com/W8pfgHRe

Cheers,
bk

[BurgerKing]

Thanks a lot, helped me a lot when fixing my hackintosh

[jewnersey]

can someone please help me with compiling this and getting it to work. im Noobuntu..

[oldos2er]

Please start a new thread for your problem, and give as much detail as possible.