Originally posted by: robinsguk

Hello,

I'm running AIX 6.1.

I have a vg with 2 pvs 1 x 360G and 1 x 60GB.

I need to migrate to a new storage system so I wondered how I'd go about migrating the data from this vg on to the single 500GB lun from the new SAN?

I'm familiar with extendvg, migratevg etc for a single pv but not sure what to do when migrating multiple pvs to a single pv.

Thanks

Glenn
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Originally posted by: SystemAdmin

You can migrate LVs one by one.

List all the LV's that are in your existing disks.

lspv -l <hdisk#> (360 GB disk)
lspv -l <hdisk#> (60 GB disk)

Make a note of LV names, then perform

migratepv -l <lvname> <sourcedisk> <targetdisk>
Kannan
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Originally posted by: orphy

Do the extendvg and then run migratepv twice. No need to worry about individual LVs in those two smaller PVs.

e.g.

migratepv 360gPV 500gPV; migratepv 60gPV 500gPV

Another way is to mirror all the LVs to the 500G PV and remove the old copy.
Orphy
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Originally posted by: robinsguk

The migratepv 360gPV 500gPV; migratepv 60gPV 500gPV doesn't work.

0516-1244 migratepv: Destination physical volume hdisk10 contains
partitions of the logical volume hd1
Glenn
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Originally posted by: orphy

Can you show outputs of these?

lsvg -l rootvg

and for each PV in rootvg, run

lspv -l <PV>
Orphy
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Originally posted by: orphy

Also

lsvg -p rootvg
Orphy
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Originally posted by: robinsguk

Here you go:

root@:/ lsvg -p rootvg
rootvg:
PV_NAME PV STATE TOTAL PPs FREE PPs FREE DISTRIBUTION
hdisk1 active 624 0 00..00..00..00..00
hdisk3 active 468 0 00..00..00..00..00
hdisk4 active 156 0 00..00..00..00..00
hdisk5 active 999 26 00..00..00..00..26
hdisk7 active 2399 2399 480..480..479..480..480
root@:/ lspv -l hdisk1
hdisk1:
LV NAME LPs PPs DISTRIBUTION MOUNT POINT
hd6 371 371 00..00..122..125..124 N/A
hd8 1 1 00..01..00..00..00 N/A
hd5 1 1 01..00..00..00..00 N/A
hd9var 7 7 00..07..00..00..00 /var
hd3 66 66 66..00..00..00..00 /tmp
hd4 64 64 00..64..00..00..00 /
hd2 36 36 36..00..00..00..00 /usr
hd1 1 1 00..01..00..00..00 /home
hd10opt 39 39 22..16..00..00..01 /opt
lg_dumplv 32 32 00..32..00..00..00 N/A
hd11admin 2 2 00..00..02..00..00 /admin
livedump 4 4 00..04..00..00..00 /var/adm/ras/livedump
root@:/ lspv -l hdisk3
hdisk3:
LV NAME LPs PPs DISTRIBUTION MOUNT POINT
paging00 468 468 94..94..93..93..94 N/A
root@:/ lspv -l hdisk4
hdisk4:
LV NAME LPs PPs DISTRIBUTION MOUNT POINT
hd4 155 155 32..31..31..31..30 /
hd2 1 1 00..00..00..00..01 /usr
hdisk5:
LV NAME LPs PPs DISTRIBUTION MOUNT POINT
hd9var 1 1 00..00..00..00..01 /var
hd4 969 969 200..200..199..200..170 /
hd2 3 3 00..00..00..00..03 /usr
root@:/ lspv -l hdisk7
Nothing returned as this pv is empty. It has sufficient capacity to hold the space used by the pvs listed above.

root@:/ lsvg -l rootvg
rootvg:
LV NAME TYPE LPs PPs PVs LV STATE MOUNT POINT
hd5 boot 1 1 1 closed/syncd N/A
hd6 paging 371 371 1 open/syncd N/A
hd8 jfs2log 1 1 1 open/syncd N/A
hd4 jfs2 1188 1188 3 open/syncd /
hd2 jfs2 40 40 3 open/syncd /usr
hd9var jfs2 8 8 2 open/syncd /var
hd3 jfs2 66 66 1 open/syncd /tmp
hd1 jfs2 1 1 1 open/syncd /home
hd10opt jfs2 39 39 1 open/syncd /opt
hd11admin jfs2 2 2 1 open/syncd /admin
lg_dumplv sysdump 32 32 1 open/syncd N/A
livedump jfs2 4 4 1 open/syncd /var/adm/ras/livedump
paging00 paging 468 468 1 open/syncd N/A
#AIX-Forum

Originally posted by: SystemAdmin

Hi,

Your rootvg seems to be very big (/ filesystem in particular) and maybe it contains also some applications data, is there any reason for that ? I use to separate system and data volume group in order to keep rootvg as clean as possible, and management or maintenance like mksysb backups or upgrade could be easier for me.
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Originally posted by: orphy

I haven't had my coffee yet so let me slow down a bit and see what exactly you are trying to do.

Are you trying to move the OS to this new disk? If not, why do you have hd1 in that disk? If you are moving the OS, it would be easier to use mirrorvg and unmorrorvg since all the specifics will be taken care of for you.

Why don't you give us more descriptions of what exactly you are trying to do?
Orphy
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Originally posted by: robinsguk

Ok, thanks.

As you can see this LPAR has been set up with 4 pvs. These are provided by an existing SAN.

The SAN is being replaced with a new SAN. I realise I could create 4 x Luns the same size on the new SAN and then migratepv these individually. I was looking to reduce the number of luns provided by the new SAN to just 1 for rootvg on this LPAR.

In essence I'm trying to use this as an opportunity to reduce the number of LUNs presented by the new SAN and, therefore, the number of hdisks that need to be 'managed' in the LPAR.
Glenn
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Originally posted by: orphy

So you ARE trying to move rootvg to a bigger disk (hdisk7) but the error message talking about hdisk10 having hd1 doesn't make sense to me since you don't have hdisk10 in rootvg, at least now. Was hdisk10 changed to hdisk7? Actually that doesn't really matter now anyway.

If you are trying to merge the smaller PVs in rootvg into a bigger PV, your best bet might be to use mirrorvg to make a second copy to the new PV. After the mirrors are synced, you can use unmirrorvg to remove the 1st copy from the old PVs and then reducevg, etc. Man mirrorvg and unmirrorvg for details. Just be aware that the PV you specify in mirrovg is the PV you want to mirror TO and the PVs you specify in unmirrorvg are the PVs you want to remove the mirror FROM (i.e. in your case the smaller hdisks).
Orphy
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Originally posted by: robinsguk

Apologies, I was trying this on another LPAR too hence the hdisk confusion.

I did wonder if mirrorvg might be the way forward. I just haven't done this with many to one.
Glenn
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Originally posted by: orphy

Also take a look at this.

http://www-01.ibm.com/support/docview.wss?uid=isg3T1000358
Orphy
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