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02-16-2013 02:13 PM - edited 02-16-2013 02:38 PM
02-16-2013 02:13 PM - edited 02-16-2013 02:38 PM
Migrate DM-Multipath to EMC-Power path
Steps by Step How To Migrate DM-Multipath to EMC-Power path.
Scenario:
1. Navisphare agent installed
2. DM-Multipath installed & Configured.
3. File system (/usr/openv) mounted and net backup server installed on the file system.
4. VERITAS Netback-up Server Running On this server.
Need to migrate from DM-Multipath to EMC-Power path (used for EMC Clarion Storage)
Power path and multipath are not compatible, So to install EMC-Power path, 1st we need to perform below tasks.
- Blacklist the LUN/Disks in multipath or move /etc multipath.conf to /etc/multipath.conf .old
Ex:
To blacklist, edit /etc/multipath and uncomment below lines,
Before change:
# Blacklist all devices by default. Remove this to enable multipathing
# on the default devices.
#blacklist {
# devnode "*"
#}
After change:
# Blacklist all devices by default. Remove this to enable multipathing
# on the default devices.
blacklist {
devnode "*"
}
Stop the multipath service.
#service multipathd stop
#chkconfig multipathd off
#/etc/init.d/multipathd status
multipathd is stopped
Stop the naviagent.
#/etc/init.d/naviagent stop
#chkcinfig naviagent off
Take file system and volume group offline.
Here first stop Net-Backup server which is running on file system /usr/openv
After stopping Net Backup server,
#umount /usr/openv
#vgchange –a –n vg01
Install EMC Powerpath on Linux
#rpm -ivh EMCpower.LINUX-5.3.1.00.00-111.rhel5.x86_64.rpm
Preparing.... ########################################### [100%]
1:EMCpower.LINUX ########################################### [100%]
All trademarks used herein are the property of their respective owners.
NOTE:License registration is not required to manage the CLARiiON AX series array.
Register EMC Powerpath
# emcpreg -install
=========== EMC PowerPath Registration ===========
Do you have a new registration key or keys to enter?[n] y
Enter the registration keys(s) for your product(s),
one per line, pressing Enter after each key.
After typing all keys, press Enter again.
Key (Enter if done): **xxxx-xxxx-xxxx-xxxx-xxxx**
1 key(s) successfully added.
Key successfully installed.
Key (Enter if done):
Key is invalid, ignored.
Try again or press Enter if done.
1 key(s) successfully registered.
Verify EMC Powerpath Registration
# powermt check_registration
Key **xxxx-xxxx-xxxx-xxxx-xxxx**
Product: PowerPath
Capabilities: All
Start powerpath daemon
#/etc/init.d/powerpath start
Starting PowerPath: done
Start Naviagent:
#/etc/init.d/naviagent start
#chkconfig naviagent on
Verify Multiple Paths
# powermt display dev=all
Pseudo name=emcpowera
CLARiiON ID=APM00104100259 [CBDSLAPPNBUP01]
Logical device ID=6006016034602A00231F5F91BF8FE111 [LUN 71]
state=alive; policy=CLAROpt; priority=0; queued-IOs=0
Owner: default=SP A, current=SP A Array failover mode: 1
==============================================================================
---------------- Host --------------- - Stor - -- I/O Path - -- Stats ---
### HW Path I/O Paths Interf. Mode State Q-IOs Errors
==============================================================================
4 qla2xxx sda SP A0 active alive 0 0
4 qla2xxx sdb SP B0 active alive 0 0
5 qla2xxx sdc SP A0 active alive 0 0
5 qla2xxx sdd SP B0 active alive 0 0
6 qla2xxx sde SP A1 active alive 0 0
6 qla2xxx sdf SP B1 active alive 0 0
7 qla2xxx sdg SP A1 active alive 0 0
7 qla2xxx sdh SP B1 active alive 0 0
To Check:
# fdisk -l /dev/emcpowera
Disk /dev/emcpowera: 536.8 GB, 536870912000 bytes
255 heads, 63 sectors/track, 65270 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/emcpowera1 1 65270 524281243+ 83 Linux
Edit /etc/fstab file
Comment the line of the current file system which configured with multipath.
#/dev/mpath01/mpath-lvol-01 /usr/openv ext3 defaults 0 0 (For this Scenario)
Reboot the server
#init 6
After reboot
Again verify Multi paths…
# powermt display dev=all
Pseudo name=emcpowera
CLARiiON ID=APM00104100259 [CBDSLAPPNBUP01]
Logical device ID=6006016034602A00231F5F91BF8FE111 [LUN 71]
state=alive; policy=CLAROpt; priority=0; queued-IOs=0
Owner: default=SP A, current=SP A Array failover mode: 1
==============================================================================
---------------- Host --------------- - Stor - -- I/O Path - -- Stats ---
### HW Path I/O Paths Interf. Mode State Q-IOs Errors
==============================================================================
4 qla2xxx sda SP A0 active alive 0 0
4 qla2xxx sdb SP B0 active alive 0 0
5 qla2xxx sdc SP A0 active alive 0 0
5 qla2xxx sdd SP B0 active alive 0 0
6 qla2xxx sde SP A1 active alive 0 0
6 qla2xxx sdf SP B1 active alive 0 0
7 qla2xxx sdg SP A1 active alive 0 0
7 qla2xxx sdh SP B1 active alive 0 0
Take file system and volume group online.
#vgchange –a –y vg01
#vgs
VG #PV #LV #SN Attr VSize VFree
vg00 1 8 0 wz--n- 104.59G 77.59G
vg01 1 1 0 wz--n- 499.99G 1016.00M
#lvs
LV VG Attr LSize Origin Snap% Move Log Copy% Convert
lvol1 vg00 -wi-ao 1.00G
lvol10 vg00 -wi-ao 4.00G
lvol11 vg00 -wi-ao 2.00G
lvol4 vg00 -wi-ao 2.00G
lvol5 vg00 -wi-ao 4.00G
lvol6 vg00 -wi-ao 4.00G
lvol7 vg00 -wi-ao 2.00G
lvol_swap vg00 -wi-ao 8.00G
lvol1 vg01 -wi-ao 499.00G
#mount /dev/emcpowera /usr/openv
#df -HT /usr/openv
Filesystem Type Size Used Avail Use% Mounted on
/dev/mapper/vg01-lvol1
ext3 528G 4.3G 497G 1% /usr/openv
Edit /etc/fstab
Insert the line
“/dev/emcpowera /usr/openv ext3 defaults,_netdev 0 0”(For This Scenario)
To Check /etc/fstab entry
#mount –av
Run fsck to check consistency,
#e2fsck /dev/vg01/lvol01
Start Net Backup Server & Check
#ps -ef | grep -i netbackup |grep -v grep
root 7120 1 0 15:49 ? 00:00:00 /usr/openv/netbackup/bin/vnetd -standalone
root 7126 1 0 15:49 ? 00:00:00 /usr/openv/netbackup/bin/bpcd -standalone
root 7332 1 0 15:50 ? 00:00:00 /usr/openv/netbackup/bin/bpcompatd
root 7343 1 0 15:50 ? 00:00:00 /usr/openv/netbackup/bin/nbrmms
root 7383 1 0 15:50 ? 00:00:00 /usr/openv/netbackup/bin/nbsl
root 7434 1 0 15:50 ? 00:00:00 /usr/openv/netbackup/bin/nbsvcmon