Re: [OT] file systems

Steve Wendt wrote:
> On 04/07/2016 11:06 PM, Dave Yeo wrote:
>
>>> The HPFS support in Linux is also very good
>>
>> Also uses EAs for symlink and permissions so is actually compatible
>> with OS/2+klibc
>
> Using EAs for symlinks predates klibc by years; klibc initially did
> something incompatible, and I was at least one of the people that
> requested it be changed to match.

Yes, so was I.
Wish that IBM had exposed permissions and symlinks in the OS/2 JFS. 
Especially having real symlinks would be nice.

>
>> Ubuntu here seems to see HPFS fine but has problems writing to it and
>> always leaves the disk dirty.
>
> Never had that problem, but I don't use Ubuntu, nor have I accessed HPFS
> under Linux in recent years.  I wouldn't be surprised if that's a
> Ubuntu-created problem (they tend to do their own thing).

I wouldn't be surprised either as back when I used to spin my own 
kernels, I never had a problem with the new (and old readonly) HPFS support.

>
> Conversely, the ext2 IFS for OS/2 worked really well for read/write once
> upon a time, but it's incompatible with the ext3/ext4 journaling and
> only works in read-only mode.  Apparently it also has some problems with
> LVM, and some have suggested even read-only doesn't work with partitions
> created with newer tools.

The ext2 IFS was forked form Linux 1.3 or 2.0 and even by 2.1, which was 
before journaling support was added, was incompatible with the IFS, 
though Linux was fine using it.
My understanding was that it never did work with LVM. It's been a long 
time since I tested it even though it is still installed here on my Warp 
v4 partition.
[...]
Dave