Before doing change Keep few important
configuration file as backup:
cat /etc/fstab
>/var/fstab-`date +%Y%m%d%H%M`
df -h
>/var/df-h-`date +%Y%m%d%H%M`
fdsik -l >
/var/fdisk-l-`date +%Y%m%d%H%M`
pvdisplay
>/var/pvdisplay-`date +%Y%m%d%H%M`
vgdisplay
>/var/vgdisplay-`date +%Y%m%d%H%M`
lvdisplay
>/var/lvdisplay-`date +%Y%m%d%H%M`
cat
/etc/lvm/lvm.conf >/var/lvmconfig-`date +%Y%m%d%H%M`
mulitpah
-ll >/var/lvmconfig-`date +%Y%m%d%H%M`
Check the fc_host port:
[root@beautifulworld]# systool -c
fc_host -v
Class =
"fc_host"
Class Device = "host3"
Class Device
path = "/sys/class/fc_host/host3"
active_fc4s = "0x00 0x00 0x01 0x00 0x00 0x00
0x00 0x01 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
0x00
0x00 0x00 0x00 0x00
0x00 0x00 0x00 0x00 0x00 "
fabric_name = "0x100000051e366ffg"
issue_lip = <store method only>
maxframe_size = "2048 bytes"
node_name = "0x200014feb536a245"
port_id = "0x02a829"
port_name = "0x200114feb536a245"
port_state = "Online"
port_type = "NPort (fabric via
point-to-point)"
speed
= "8 Gbit"
supported_classes = "Class 3"
supported_fc4s = "0x00 0x00 0x01 0x00 0x00 0x00 0x00
0x01 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
0x00 0x00 0x00 0x00
0x00 0x00 0x00 0x00 0x00 "
supported_speeds = "2 Gbit, 4 Gbit, 8 Gbit"
tgtid_bind_type = "wwpn (World Wide
Port Name)"
uevent
= <store method only>
Device = "host3"
Device path = "/sys/devices/pci0000:00/0000:00:09.0/0000:05:00.0/host3"
uevent
= <store method only>
Class Device = "host4"
Class Device
path = "/sys/class/fc_host/host4"
active_fc4s = "0x00 0x00 0x01 0x00 0x00 0x00
0x00 0x01 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
0x00
0x00 0x00 0x00 0x00
0x00 0x00 0x00 0x00 0x00 "
fabric_name = "0x100000051e367055"
issue_lip = <store method only>
maxframe_size = "2048 bytes"
node_name = "0x200014feb536a245"
port_id = "0x02a879"
port_name = "0x200214feb536a245"
port_state = "Online"
port_type = "NPort (fabric via
point-to-point)"
speed
= "8 Gbit"
supported_classes = "Class 3"
supported_fc4s = "0x00 0x00 0x01 0x00 0x00 0x00 0x00
0x01 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
0x00 0x00 0x00 0x00
0x00 0x00 0x00 0x00 0x00 "
supported_speeds = "2 Gbit, 4 Gbit, 8 Gbit"
tgtid_bind_type = "wwpn (World Wide
Port Name)"
uevent
= <store method only>
Device = "host4"
Device path = "/sys/devices/pci0000:00/0000:00:09.0/0000:05:00.1/host4"
uevent
= <store method only>
[root@beautifulworld
scsi_host]# multipath -ll
dbdisk5
(360060e8006cia1000000cfb100000321) dm-9 HITACHI,OPEN-V
[size=100G][features=1
queue_if_no_path][hwhandler=0][rw]
\_
round-robin 0 [prio=2][active]
\_
3:0:0:4 sdf 8:80
[active][ready]
\_
4:0:0:4 sdk 8:160 [active][ready]
dbdisk4
(360060e8006cia1000000cfb1000012c3) dm-8 HITACHI,OPEN-V
[size=100G][features=1
queue_if_no_path][hwhandler=0][rw]
\_
round-robin 0 [prio=2][active]
\_
3:0:0:3 sde 8:64
[active][ready]
\_
4:0:0:3 sdj 8:144 [active][ready]
dbdisk3
(360060e8006cia1000000cfb1000012c2) dm-7 HITACHI,OPEN-V
[size=100G][features=1
queue_if_no_path][hwhandler=0][rw]
\_
round-robin 0 [prio=2][active]
\_
3:0:0:2 sdd 8:48 [active][ready]
\_
4:0:0:2 sdi 8:128 [active][ready]
dbdisk2
(360060e8006cia1000000cfb1000012c1) dm-6 HITACHI,OPEN-V
[size=100G][features=1
queue_if_no_path][hwhandler=0][rw]
\_
round-robin 0 [prio=2][active]
\_
3:0:0:1 sdc 8:32 [active][ready]
\_
4:0:0:1 sdh 8:112 [active][ready]
dbdisk1
(360060e8006cia1000000cfb100000336) dm-5 HITACHI,OPEN-V
[size=100G][features=1
queue_if_no_path][hwhandler=0][rw]
\_
round-robin 0 [prio=2][active]
\_
3:0:0:0 sdb 8:16 [active][ready]
\_
4:0:0:0 sdg 8:96
[active][ready]
Now scan the New LUN, host3 & host4 (from Systool
output):
[root@beautifulworld
scsi_host]# echo "- - -" > /sys/class/scsi_host/host3/scan
[root@beautifulworld
scsi_host]# echo "- - -" > /sys/class/scsi_host/host4/scan
[root@beautifulworld
scsi_host]# multipath -l
mpath1
(360060e8006cia1000000cfb100000382) dm-18 HITACHI,OPEN-V
[size=100G][features=1
queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=0][active]
\_ 3:0:0:5 sdn 8:208 [active][undef]
\_ 4:0:0:5 sdo 8:224 [active][undef]
dbdisk5
(360060e8006cia1000000cfb100000321) dm-9 HITACHI,OPEN-V
[size=100G][features=1
queue_if_no_path][hwhandler=0][rw]
\_
round-robin 0 [prio=0][active]
\_
3:0:0:4 sdf 8:80
[active][undef]
\_
4:0:0:4 sdk 8:160 [active][undef]
dbdisk4
(360060e8006cia1000000cfb1000012c3) dm-8 HITACHI,OPEN-V
[size=100G][features=1
queue_if_no_path][hwhandler=0][rw]
\_
round-robin 0 [prio=0][active]
\_
3:0:0:3 sde 8:64
[active][undef]
\_
4:0:0:3 sdj 8:144 [active][undef]
dbdisk3
(360060e8006cia1000000cfb1000012c2) dm-7 HITACHI,OPEN-V
[size=100G][features=1
queue_if_no_path][hwhandler=0][rw]
\_
round-robin 0 [prio=0][active]
\_
3:0:0:2 sdd 8:48 [active][undef]
\_
4:0:0:2 sdi 8:128 [active][undef]
dbdisk2
(360060e8006cia1000000cfb1000012c1) dm-6 HITACHI,OPEN-V
[size=100G][features=1
queue_if_no_path][hwhandler=0][rw]
\_
round-robin 0 [prio=0][active]
\_
3:0:0:1 sdc 8:32 [active][undef]
\_
4:0:0:1 sdh 8:112 [active][undef]
dbdisk1
(360060e8006cia1000000cfb100000336) dm-5 HITACHI,OPEN-V
[size=100G][features=1
queue_if_no_path][hwhandler=0][rw]
\_
round-robin 0 [prio=0][active]
\_
3:0:0:0 sdb 8:16 [active][undef]
\_
4:0:0:0 sdg 8:96
[active][undef]
[root@beautifulworld
scsi_host]#
Here we got new mpath1 with
360060e8006cia1000000cfb100000382
mpath1
(360060e8006cia1000000cfb100000382) dm-18 HITACHI,OPEN-V
[size=100G][features=1
queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0
[prio=0][active]
\_
3:0:0:5 sdn 8:208 [active][undef]
\_
4:0:0:5 sdo 8:224 [active][undef]
Configure the multipath with an alias, Add the
following lines in /etc/multipath.conf
multipath {
wwid
360060e8006cia1000000cfb100000382
alias dbdisk6
}
Flush the dbdisk6 (multipath -f dbdisk6):
[root@beautifulworld scsi_host]# multipath -f dbdisk6
Restart the multipath service:
[root@beautifulworld
scsi_host]# service multipathd restart
Stopping multipathd
daemon:
[ OK ]
Starting multipathd
daemon:
[ OK ]
[root@beautifulworld
scsi_host]# multipath -ll
dbdisk6
(360060e8006cia1000000cfb100000382) dm-18 HITACHI,OPEN-V
[size=100G][features=1
queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=2][active]
\_ 3:0:0:5 sdn 8:208 [active][ready]
\_ 4:0:0:5 sdo 8:224 [active][ready]
dbdisk5
(360060e8006cia1000000cfb100000321) dm-9 HITACHI,OPEN-V
[size=100G][features=1
queue_if_no_path][hwhandler=0][rw]
\_
round-robin 0 [prio=2][active]
\_
3:0:0:4 sdf 8:80
[active][ready]
\_
4:0:0:4 sdk 8:160 [active][ready]
dbdisk4
(360060e8006cia1000000cfb1000012c3) dm-8 HITACHI,OPEN-V
[size=100G][features=1
queue_if_no_path][hwhandler=0][rw]
\_
round-robin 0 [prio=2][active]
\_
3:0:0:3 sde 8:64
[active][ready]
\_
4:0:0:3 sdj 8:144 [active][ready]
dbdisk3
(360060e8006cia1000000cfb1000012c2) dm-7 HITACHI,OPEN-V
[size=100G][features=1
queue_if_no_path][hwhandler=0][rw]
\_
round-robin 0 [prio=2][active]
\_
3:0:0:2 sdd 8:48 [active][ready]
\_
4:0:0:2 sdi 8:128 [active][ready]
dbdisk2
(360060e8006cia1000000cfb1000012c1) dm-6 HITACHI,OPEN-V
[size=100G][features=1
queue_if_no_path][hwhandler=0][rw]
\_
round-robin 0 [prio=2][active]
\_
3:0:0:1 sdc 8:32 [active][ready]
\_
4:0:0:1 sdh 8:112 [active][ready]
dbdisk1
(360060e8006cia1000000cfb100000336) dm-5 HITACHI,OPEN-V
[size=100G][features=1
queue_if_no_path][hwhandler=0][rw]
\_
round-robin 0 [prio=2][active]
\_
3:0:0:0 sdb 8:16 [active][ready]
\_
4:0:0:0 sdg 8:96
[active][ready]
[root@beautifulworld
scsi_host]#
Check the device get created or not
[root@beautifulworld
scsi_host]# cd /dev/mpath
[root@beautifulworld mpath]# ls
dbdisk1
dbdisk2 dbdisk3 dbdisk4 dbdisk5 dbdisk6
Create a physical volume
[root@beautifulworld
mpath]# pvcreate /dev/mpath/dbdisk6
Writing
physical volume data to disk "/dev/mpath/dbdisk6"
Physical
volume "/dev/mpath/dbdisk6" successfully created
[root@beautifulworld
mpath]# vgdisplay -v datavg
Extend the VG
[root@beautifulworld
mpath]# vgextend datavg /dev/mpath/dbdisk6
Volume group "datavg" successfully extended
[root@beautifulworld mpath]# vgdisplay
Extend the LV
[root@beautifulworld
mpath]# lvextend -L +100G /dev/mapper/datavg-db
Extending logical volume dbto 473.00 GB
Logical volume dbsuccessfully resized
Now resize the file system
[root@beautifulworld
mpath]# resize2fs /dev/mapper/datavg-db
resize2fs 1.39
(29-May-2006)
Filesystem
at /dev/mapper/datavg-db is mounted on
/datadb1; on-line resizing required
Performing
an on-line resize of
/dev/mapper/datavg-db to 123994112 (4k) blocks.
The
filesystem on /dev/mapper/datavg-db is now
123994112 blocks long.
Now Check the file system
[root@beautifulworld
mpath]# df -h /datavg-db
Filesystem
Size Used Avail Use% Mounted on
/dev/mapper/datavg-db
466G 338G
105G 77% /datadb1
