Solaris

Hi All,

I have mount /usr directory as a seperate filesystem.The /usr directory includedd in / root file system.I have to mount it as seperate.

Please Help me,

Thanks and Regards,

You can only do that if you have formatted /usr to be a separate partition in the partition table. If you did not do that during the installation, you can't do it

This is not true. Provided there is enough space on a disk and an unused partition /usr can be moved. A reboot is required, but that is as far as it goes in terms of downtime.

The procedure would be:

make a new filesystem

mount the new filesystem, for exmaple to /mnt

Code:

cd /usr
find . | cpio -pmdu /mnt
umount /mnt

edit vfstab as required

reboot to single user mode

Code:

mv /usr /usr.old
mkdir /usr

exit and allow the machine to continue the boot sequence.

Once you're happy that everything is ok you can remove /usr.old

I have done it before, this is what I have done:

1. First, you should have enough space on another slice.

2. partition this slice.

3. create new file system on that slice.

4. go to SINGLE USER MODE , this is essential as you are moving OS file system, it won't work unless you do it in SINGLE USER mode

Code:

# init S

5. then, mount the slice you create on a temporary directory, such as /mnt

6. do this:

Code:

# ufsdump 0uf - /usr | (cd /mnt; ufsrestore rf -)

this will take about 15 minutes or so, depends, just make sure you are in single user mode.


7. do this

Code:

# cd /mnt

# rm restoremytable

8. you will have a small problem now, if you do

Code:

# ls /mnt

lost+found usr

the problem you will find a directory inside /mnt called "usr" which means you will have to do the following:

Code:

# cd /mnt/usr

# cp -Rp * /mnt

9. After you finish the copy do this:

Code:

 
# cd /mnt

# rm -R usr

10. Last step is, edit /etc/vfstab, and add an entry to mount /usr from the new slice, then reboot.


I've done this and tested, it worked perfectly. I tried it with /usr and with /var

Good luck.

This is an interesting solution I've never tried.

is it going to work without using "dump" ?

your way looks faster and better than the way I did it

Yes, it will work without dump but I don't think there would be too much difference in speed except for the fact that you have an extra copy. We are really doing the same thing, just using different tools.

Also it looks like you never removed the old /usr.

Interesting. Yes I didn't remove old /usr , after the reboot and confirm it work, I remove it usually.

Thanks