mirror lvol composed of two disks to two other disks.

[jerrym]

I am trying to mirror lvol5 which is composed of two disks. How can I evenly mirror them

on two other disks? When I try to extend lvol5, it mirrors both disks to one disk.

I would like disk to disk mirror.

c0t8d0 -> c1t8d0

c0t10d0 -> c1t10d0

Not everything mirror to one disk

c0t8d0 -> c1t8d0

c0t10d0 -> c1t8d0

lvol5

   --- Distribution of logical volume ---
   PV Name            LE on PV  PE on PV
   /dev/dsk/c0t10d0   256       256
   /dev/dsk/c0t8d0    512       512

[James R. Ferguson]

Hi:

Try :

# lvextend -m 1 /dev/vgNN/lvol5 /dev/dsk/c1t8d0 /dev/dsk/c1t10d0

Regards!

...JRF...

[jerrym]

Hi James. I tried that and it ended up mirroring everything for c0t8 and c0t10 onto c1t8.

Is this going to be a vg disk group create??  Which I guess would then mirror disk to disk

as appropriate. ??

vgcreate -g pvg_name vg_name

[Torsten.]

Did you meanwhile solve your vg00 mirroring problem?

[James R. Ferguson]

HI (again):

Try creating an '/etc/lvmpg' file and specify the desired mirror operation using PVG's.  You can create this file for an existing volume group.  See the manpages for 'lvmpvg(4)'.

Regards!

...JRF...

[jerrym]

Torsten, yes. I managed to get all the vg00 lvols nicely mirrored from c0t8d0 to c1t8d0

and c0t10d0 to c1t10d0.  Both c0t8d0 and c1t8d0 are now boot devices also.

But I still cannot figure out how to remove old boot disk c0t10d0 as boot device

from lvlnboot -v display. I did a rmboot on c0t10d0 which removed the boot files.

But it still shows up as boot disk in lvlnboot. How do I get rid of it?

 # lvlnboot -v
Boot Definitions for Volume Group /dev/vg00:
Physical Volumes belonging in Root Volume Group:
        /dev/dsk/c0t10d0 (0/0/1/1/0/4/0.10.0) -- Boot Disk
        /dev/dsk/c1t10d0 (0/0/1/1/0/4/1.10.0)
        /dev/dsk/c0t8d0 (0/0/1/1/0/4/0.8.0) -- Boot Disk
        /dev/dsk/c1t8d0 (0/0/1/1/0/4/1.8.0) -- Boot Disk

Thank you for asking.

[jerrym · Accepted solution]

James, I will look into pvg's. I managed to move one of the lvols to another disk and did

not have to mirror two at this time. But in the future I may have to do so.

Thanks

[Robert_Jewell]

> But I still cannot figure out how to remove old boot disk c0t10d0 as boot device

> from lvlnboot -v display. I did a rmboot on c0t10d0 which removed the boot files.

> But it still shows up as boot disk in lvlnboot. How do I get rid of it?

Does the disk still exist in the vg00 volume group?  I noted that only when I reduced the disk from the VG did the reference to it be removed from the lvlnboot output.  Since the root/boot/swap/dump reference is within the vgxx.conf file, I think the reference will remain until it has been removed from the VG.

If you do this, run lvlnboot -R afterwards to update the info.

-Bob

[jerrym]

Thanks Robert.  This worked.

lvreduce -m 0 /dev/vg00/lvol7 /dev/dsk/c0t10d0

lvreduce -m 0 /dev/vg00/lvol8 /dev/dsk/c0t10d0

lvreduce -m 0 /dev/vg00/lvol9 /dev/dsk/c0t10d0

lvreduce -m 0 /dev/vg00/lvol10 /dev/dsk/c0t10d0

vgreduce vg00 /dev/dsk/c0t10d0

lvlnboot -R

pvcreate  /dev/rdsk/c0t10d0   --had to do this. it still came back as boot drive when adding back.

vgextend vg00 /dev/dsk/c0t10d0

lvextend -m 1  /dev/vg00/lvol7  /dev/dsk/c0t10d0

lvextend -m 1  /dev/vg00/lvol8  /dev/dsk/c0t10d0

lvextend -m 1  /dev/vg00/lvol9  /dev/dsk/c0t10d0

lvextend -m 1  /dev/vg00/lvol10  /dev/dsk/c0t10d0

[Robert_Jewell]

> pvcreate /dev/rdsk/c0t10d0 --had to do this. it still came back as boot drive when adding back.

Ahh...yes, forgot about that...Sorry..glad you got it!

[Steven E. Protter]

Shalom,

I would point out that if you are actually booted off the device, you will have a hard time elmiminating it from thelvlnboot configuration.

If it is not the disk you are booting from, you have a few choices.

lvsplit # which will let you take logical volumes off the boot disk via a rename type process. Afterwards lvremove the logical volumes.

lvextend does permit you to reduce the number of mirror copies and specify which disk they should come off of.

SEP