topic Re: user has no write permissions to ramdisk in Operating System - HP-UX

user has no write permissions to ramdisk

cl_5 — Tue, 22 Feb 2005 05:38:56 GMT

Hi Forumers,

I´ve got a A500-machine with 11.11 running on it. On this I ´ve configured a ramdisk.
Everytime the ramdisk becomes mounted while booting I have no write permissions as non-root user. So I changed permissions to this directory,umount and mount, everything´s alright. until I boot again. I already tried this with hfs and vxfs filesystems

my fstab entry looks like this:

/dev/dsk/ramdisc /ramdisk vxfs defaults 0 2

the device file permissions of block and character devices are:
brw-r--r-- 1 root sys 9 0x0ff0f0 ... /dev/dsk/ramdisc
crw-r--r-- 1 root sys 9 0x0ff0f0 ... /dev/rdsk/ramdisc

Something in this case makes me confused. I´ve got an A440-machine with 11.0 on it. It has the same configuration and it works?!?

Any ideas?

Thanks in advance
cl

Re: user has no write permissions to ramdisk

Stephen Keane — Tue, 22 Feb 2005 05:42:57 GMT

What permissions do you have on the directory you are mounting it on

/ramdisk

Not the device files.

Re: user has no write permissions to ramdisk

cl_5 — Tue, 22 Feb 2005 05:54:48 GMT

Hi Stephen,

thanks for replying so fast.

The permissions of the mounting dir is as follows

drwxrwxrwx root root /ramdisk

Writing should be possible.

regards
cl

Re: user has no write permissions to ramdisk

Stephen Keane — Tue, 22 Feb 2005 05:58:48 GMT

I agree, it should be writeable!

If you have the time, you might want to look at /etc/mnttab

(1) After you have booted, and the /ramdisc directory is not writable.

(2) After you have unmounted and mounted and the /ramdisc directiry is writeable

If there is a difference between the two entries it should give us a clue.

Re: user has no write permissions to ramdisk

cl_5 — Tue, 22 Feb 2005 06:13:14 GMT

Yes, there is really a difference!
The entry in /etc/mnttab looks like
/dev/dsk/ramdisc /ramdisk vxfs log 0 0 1109070115
This mount options contains only "log". Is it possible to change these settings?

Temporary IÂ´ve added a chmod 777 for /ramdisk in /sbin/init.d/localmount to go around. But IÂ´m not happy with this solution.

regard

Re: user has no write permissions to ramdisk

Stephen Keane — Tue, 22 Feb 2005 06:26:10 GMT

Change your /etc/fstab entry to

/dev/dsk/ramdisc /ramdisk vxfs largefiles,rw,suid 0 2

And see if that helps

Re: user has no write permissions to ramdisk

cl_5 — Tue, 22 Feb 2005 06:51:09 GMT

I already checked this. No changes.

There must be a difference between mounting manually via fstab and mounting while booting.

Maybe the filehandle has changed in 11.11 and became more secure. Only an idea

regards
cl

Re: user has no write permissions to ramdisk

Stephen Keane — Tue, 22 Feb 2005 07:07:10 GMT

What does your /etc/mnttab file look like when you've just booted AND what does it look like after you've done your manual mount?

2 files to post!

Re: user has no write permissions to ramdisk

cl_5 — Tue, 22 Feb 2005 07:43:34 GMT

ThereÂ´s no difference