Filesystem that both FreeBSD and OS X can read/write

Garrett Cooper youshi10 at
Mon Apr 2 02:09:21 UTC 2007

Eric Crist wrote:
> On Apr 1, 2007, at 3:46 PM, Garrett Cooper wrote:
>> mal content wrote:
>>> On 01/04/07, Eric Crist <mnslinky at> wrote:
>>>> On Apr 1, 2007, at 12:53 PM, mal content wrote:
>>>> > Hello.
>>>> >
>>>> > I have a small USB hard disk enclosure and would like to start
>>>> > using it to transfer files between OS X and FreeBSD machines.
>>>> >
>>>> > Is there a filesystem that both OS X and FreeBSD can reliably
>>>> > read and write to? I've heard that OS X supports UFS, but there's
>>>> > no clear definition on what UFS actually is. I mean Free/Open/Net/
>>>> > DragonFly all seem to have slightly differing definitions...
>>>> >
>>>> > Any ideas?
>>>> > MC
>>>> >
>>>> > (please cc: as I'm not subscribed)
>>>> My recommendation would be to use *gasp* FAT32 for the file system.
>>>> This allows you FreeBSD/MacOSX/Linux/ and the occasional Windows
>>>> support when you eventually need it.  If you only need OS X/FreeBSD
>>>> support, UFS is safe.  IIRC, UFS2 is safe, as well.  I've got a drive
>>>> I'm using that I think is UFS2 formatted.  I'd check, but it's at the
>>>> office.
>>> Hi.
>>> Ok, I'll give it a go on an empty drive and see what happens.
>>> Would you recommend formatting the drive on an OS X machine, or
>>> a FreeBSD machine (or is it irrelevant)?
>>> thanks,
>>> MC
>> I'd do it on the FreeBSD machine. IIRC Mac OSX did some funky stuff 
>> with the MBR / slices when formatting disks.
>> -Garrett
> I just took another disk, formated with UNIX Files System on my Mac, 
> and it mounts just fine as UFS on my FreeBSD system.
Well, hmm.. that's where the IIRC came from though because I wasn't 
positive. What version of OSX were you running when you formatted the 
disk, by the way?

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