* You are viewing the archive for October, 2009

Mounting Linux NFS share: Not owner

somedude October 11, 2009 centos, linux, linux tips, nfs, redhat, solaris, solaris tips No Comments

I was trying to mount a RHEL 4 NFS share in Solaris 10. But for whatever reason I just could not seem to get it mounted. It would always come back with “Not owner” error:

bash-3.00# mount -F nfs carbon:/media/cdrecorder /mnt/carbon
nfs mount: mount: /mnt/carbon: Not owner

So, I checked and rechecked my settings with no success. Then, I remembered reading something somewhere about NFS v4 in Linux being not so great at one time. Since the Linux box was running RHEL 4 I tought this might be my problem. So, I decided to force mount using NFS v3, since Solaris 10 will try to mount the Linux share using NFS v4 first.

bash-3.00# mount -F nfs -o vers=3 carbon:/media/cdrecorder /mnt/carbon
bash-3.00# cd /mnt/carbon
bash-3.00#

That worked well. Since this was one time mounting job, I did not bother any further. If I would be doing this on regular basis I would probably edit /etc/default/nfs on the Solaris box and force maximum NFS client version to be v3. Continue Reading

Weird disk label after using ZFS on a LUN

somedude October 04, 2009 solaris, solaris tips, zfs No Comments

If you ever used ZFS on a LUN and then tried to reuse that LUN for UFS you might have noticed a “weird” disk label on it. This is known as EFI label.

Here is how it looks in format command:

partition> p
Current partition table (original):
Total disk sectors available: 73383902 + 16384 (reserved sectors)

Part Tag Flag First Sector Size Last Sector
0 usr wm 34 34.99GB 73383902
1 unassigned wm 0 0 0
2 unassigned wm 0 0 0
3 unassigned wm 0 0 0
4 unassigned wm 0 0 0
5 unassigned wm 0 0 0
6 unassigned wm 0 0 0
8 reserved wm 73383903 8.00MB 73400286

If you use straight format command there is no way to get rid of EFI label. Instead, you have to use -e option with format to get to expert features:

bash-3.00# format -e

With -e options when you label the LUN you will be asked about the type of label you want to put on the disk:

format> label
[0] SMI Label
[1] EFI Label
Specify Label type[1]: 0
Warning: This disk has an EFI label. Changing to SMI label will erase all
current partitions.
Continue? y
Auto configuration via format.dat[no]? yes

I suppose you could alternatively use dd command and blank out the whole disk. Continue Reading