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Due to the need of production, the capacity of / data directory is expanded from 90g to 190g, increasing 100g of space.

The production environment is a RHEL server, and the back end is EMC storage connected through a fibre switch. First of all, RAID the idle hard disk on EMC storage, divide the LUN, and map it to the production RHEL server.

(note: the premise of this expansion is that the partition must be completed in LVM format)

Disk information of the original server

# df-H

/ dev/datavg/lv_data

90g 81g 9G 90% / data

# lvdisplay

-Logical volume

LV Name / dev/datavg/lv_data

VG Name datavg

LV UUID Sgpcu1-7Xhr-0gwH-qjJ6-QwBB-k2KA-9DJvFt

LV Write Access read/write

LV Status available

# open 1

LV Size 90.00 GB

Current LE 24882

Segments 10

Allocation inherit

Read ahead sectors auto

-currently set to 256

Block device 253:1

Restart the server, identify the newly added LUN on the EMC, and expand the datavg volume on the server side

# powerrmt display dev=all

Pseudo name=emcpowery

CLARiiON ID=CKM00110900942 [SG_DRAGON]

Logical device ID=6006016003602C00F0154D04917BE011 [LUN 211]

State=alive; policy=CLAROpt; priority=0; queued-IOs=0

Owner: default=SP A, current=SP An Array failover mode: 1

=

-Host-- Stor-I take O Path-Stats--

# HW Path I/O Paths Interf. Mode State Q-IOs Errors

=

7 qla2xxx sdan SP B0 active alive 0 0

5 qla2xxx sdas SP B1 active alive 0 0

7 qla2xxx sdbo SP A1 active alive 0 0

5 qla2xxx sdq SP A0 active alive 0 0

# powerrmt config

# powerrmt save

3. Steps:

Fdisk / dev/emcpowery1 then press n to add a new partition

Enter p to create the primary partition, and enter twice to allocate all the space to this partition.

Enter t to convert the partition type; enter 8e to convert to linux lvm partition

Enter w to write save and exit.

Create PV

[root@linuxas /] # pvcreate / dev/ emcpowery1

Add to an existing logical volume group

[root@linuxas /] # vgextend datavg / dev/ emcpowery1

Expand the capacity of LVM

[root@linuxas /] # lvextend-L + 100G / dev/datavg/lv_data

Check the relationship between inode and block corresponding to LVM devices

[root@linuxas /] # e2fsck-f / dev/datavg/lv_data

Make the increased capacity effective

[root@linuxas /] # resize2fs / dev/datavg/lv_data

IV. Verification

# df-H

/ dev/datavg/lv_data

190G 81G 109G 43% / data

# lvdisplay

-Logical volume

LV Name / dev/datavg/lv_data

VG Name datavg

LV UUID Sgpcu1-7Xhr-0gwH-qjJ6-QwBB-k2KA-9DJvFt

LV Write Access read/write

LV Status available

# open 1

LV Size 190.00 GB

Current LE 39882

Segments 10

Allocation inherit

Read ahead sectors auto

-currently set to 256

Block device 253:1

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