Veritas Volume Manager -8 [ volume disk removal]

                                      

                    VXVM-8 (Volume –Disk Removal)

What we will learn in Next Few Pages,

·         Online remove disks from volume

Well, I have a volume of 3g and used only 200mb, and I know that it is not going to cross 400-500m ever.

So want to remove some disks and use somewhere else.

root@pr-01:>/# df -kh /test-vol/

Filesystem             size   used  avail capacity  Mounted on

/dev/vx/dsk/mydg/myvol-1

                       2.7G   119M   2.4G     5%    /test-vol

root@pr-01:>/# vxprint -htq -uh

Disk group: mydg

dg mydg         default      default  14000    1411625739.18.pr-01

dm d2           c2t2d0s2     auto     32.87m   923.00m  -

dm d3           c2t3d0s2     auto     32.87m   923.00m  -

dm d4           c2t4d0s2     auto     32.87m   923.00m  -

v  myvol-1      -            ENABLED  ACTIVE   2.70g    SELECT    -        fsgen

pl myvol-1-01   myvol-1      ENABLED  ACTIVE   2.70g    CONCAT    -        RW

sd d2-01        myvol-1-01   d2       0.00     923.00m  0.00      c2t2d0   ENA

sd d3-01        myvol-1-01   d3       0.00     923.00m  923.00m   c2t3d0   ENA

sd d4-01        myvol-1-01   d4       0.00     923.00m  1.80g     c2t4d0   ENA

well… all good,

But I don’t know which disk has data and which are free,

root@pr-01:>/# vxprint -g mydg -F '%sdnum' d2

1

root@pr-01:>/# vxprint -g mydg -F '%sdnum' d3

1

root@pr-01:>/# vxprint -g mydg -F '%sdnum' d4

1

Great… all o/p is 1 means every disk has data

NOW… squeeze / adjust data in 1 disk and let’s free 2 disks

root@pr-01:>/# vxresize -g mydg myvol-1 800M alloc=d3,d4

alloc=d3,d4 means remove data from these disks and adjust to another available disk in that volume.

Now, Check the data status

root@pr-01:>/# vxprint -g mydg -F '%sdnum' d2

1

root@pr-01:>/# vxprint -g mydg -F '%sdnum' d3

0

root@pr-01:>/# vxprint -g mydg -F '%sdnum' d4

0

Well… it is adjusted in d2, d3 & d4 are free to remove

root@pr-01:>/# vxdg -g mydg rmdisk d3

root@pr-01:>/# vxdg -g mydg rmdisk d4

root@pr-01:>/# vxdisk list

DEVICE       TYPE            DISK         GROUP        STATUS

c1t0d0s2     auto:none       -            -            online invalid

c2t2d0s2     auto:sliced     d2           mydg         online

c2t3d0s2     auto:sliced     -            -            online

c2t4d0s2     auto:sliced     -            -            online

root@pr-01:>/# vxprint -htq -uh

Disk group: mydg

dg mydg         default      default  14000    1411625739.18.pr-01

dm d2           c2t2d0s2     auto     32.87m   923.00m  -

v  myvol-1      -            ENABLED  ACTIVE   800.00m  SELECT    -        fsgen

pl myvol-1-01   myvol-1      ENABLED  ACTIVE   800.00m  CONCAT    -        RW

sd d2-01        myvol-1-01   d2       0.00     800.00m  0.00      c2t2d0   ENA