Extending filesystems and EMC

[Chris Fadrowski]

i have two filesystems /e04 and /e04a both on one 9 gig drives attached to a EMC Symetrix

I want to eliminate /e04a and add it to /e04.

when i do a vgdisplay on /e04a i see an "alternate link to a /dev/dsk/c13tXdX"

I want to make sure i cover my bases here in my steps

1. delete /e04a
2. vgextend vg06 /dev/dsk/c9t2d2 (vg06 is /e04 and the c9t2d2 is the disk from /e04a)

3. lvextend -L 8628 /dev/vg06/lvol104 /dev/dsk/c9t2d2
(lvol104 exists on /e04)

4. umount /e04
5. extendfs -F vxfs /dev/vg06/e04

Here is where i need help. i want to make sure there is an alternate path for this disk. Do i lvextend -L 8628 /dev/vg06 /dev/dsk/c13tXdX (alternate path address from above)?

Need someone to check my steps. Thank you!! is this correct?

[Michael Tully]

Hi,

Before deleting anything, do you have
a backup of the directories that you
want to keep? If not then continue.

You don't need to do 'vgextend' if the
disk already belongs in vg06. If it
is does not then
# vgreduce /dev/vgXX /dev/dsk/c13t2d2
(alternate link)
# vgreduce /dev/vgXX /dev/dsk/c9t2d2
(if this disk is the only one that
is left in the group the do a
# vgremove /dev/vgXX

Once the disk is free, you can add it
to the other group
# vgextend /dev/vg06 /dev/dsk/c9t2d2
# umount /e04
Do your lvextend
# extendfs /dev/vg06/rlvol104
# mount /dev/vg06/lvol104 /e04
If /dev/dsk/c13t2D2 was the alternate
link to /dev/dsk/c9t2d2 you will need
to add as follows:
# vgextend /dev/vg06 /dev/dsk/c13t2d2
This will then be displayed as an
alternate link.

HTH
-Michael

[Roger Baptiste]

<>

Do you mean you want to
remove the Filesystem e04a and reclaim that space by extending /e04??

Do
bdf /e04a
bdf /e04
-> make sure what LV''s they belong to. This will also tell you the VG they belong to.

Next, if you need the data of /e04a, make a backup of it.


<>

Alternate links are pv paths which point to the same disk.

<<1. delete /e04a >>

-> bdf /e04a ;
-> note the lvname
-> backit up , if necessary
-> umount /e04a
-> lvremove

<<2. vgextend vg06 /dev/dsk/c9t2d2 (vg06 is /e04 and the c9t2d2 is the disk from /e04a) >>

If /eo4 and /e04a belong to the same Volumegroup, then you do not need to do vgextend.


<<3. lvextend -L 8628 /dev/vg06/lvol104 /dev/dsk/c9t2d2
(lvol104 exists on /e04) >>

Ok. Please note that the size 8628 will the total mb of the lv and not the increment.
If you want to add the pvlink,
you can do it in the above step iteself by adding the pvlink path after the primary path.
eg: lvcreate -L xxx lvname pripath alternatepath


<<4. umount /e04
5. extendfs -F vxfs /dev/vg06/e04 >>

If you have JFS, no need to umount; you can simply run
value=8628*1024 (calculate this)

fsadm -b /e04

Otherwise, use extendfs after unmounting, but you need to run it on the rawlv i.e
/dev/vgxx/re04.



<>

You can include /dev/dsk/c13xx in the lvextend command at the third step itself.

HTH
raj