JFS access from Breezy

paul marwick paulm at waitrose.com
Thu Jan 19 16:02:42 UTC 2006

In article <200601191215.44021.email.listen at gmail.com>,
email.listen at googlemail.com wrote:

> It is an JFS partition not an HPFS partition?
> AFAIK OS/2 standard filesystem is HPFS, isn't it?

You're right - HPFS is probably still the standard for OS/2. However,
JFS has been available in OS/2 since around 2000. And since HPFS has a
2 GB file limit, JFS can be very useful. This is definately a JFS

> Try to mount as an HPFS partition using the '-t hpfs' option

I found part of the problem. For some reason, the permissions on the
mount point were different from any of the other mount points created
by the installer:

drwxr-xr-x  2 root root 4096 2006-01-18 15:55 hda10
drwx------  4 root root  256 2005-12-04 16:50 hda18

hda10 is an hpfs volume, hda18 is the JFS volume. As you can see, it
doesn't have any permissions for group or world. Strange...

I changed the permissions to match those for the other mount points and
I can now gain access to the volume. Still a problem though - as a
normal user I can change into the directory, but I can't do anything
further. An 'ls -l' just gets me permission denied. Doing an ls with
sudo (a bit roundabout - 'sudo mc', change to the hda10 directory, then
use CTRL-O to gain access to the command line) gets me this:

----------  1 root root   22634228 2005-08-29 18:06 boot.imz
----------  1 root root 2147483647 2005-08-29 17:44 ubuntu-root.imz
----------  1 root root 1491431281 2005-08-29 18:17 win2k.imz

I'm not sure if this is standard for JFS under Linux or whether this is
indicitive of a compatability problem between the two versions. It does
make it difficult to do anything though.

If anyone has used native JFS under Linux, I'd be interested in knowing
what the permissions look like there...


paulm at waitrose.com
Marwick Computer Services - Chipping Norton, Oxfordshire, UK
OS/2, LAN and general Computer Consultants

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