1. Before install power path ,modify the lvm.conf file filter options
#vi /etc/lvm/lvm.conf
filter =[ "a|/dev/cciss|", "a|/dev/emc|", "r/.*/" ]
Note : Modify the filter as needed using standard shell-scripting regular
#vi /etc/lvm/lvm.conf
filter =[ "a|/dev/cciss|", "a|/dev/emc|", "r/.*/" ]
Note : Modify the filter as needed using standard shell-scripting regular
expressions. For example, to include partitions sda1 to sda9 for LVM2 while filtering out the remaining sd device nodes, set the filter field to
filter=["a/sda[1-9]$/", "r/sd*/", "a/.*/"].
2. Rebuild the LVM2 cache. Enter:
# vgscan -v
3.verify the filter is working fine
# lvmdiskscan
4. Recreate the initrd image to reflect the changes to the /etc/lvm/lvm.conf file. Enter:
# mkinitrd
( ex - /sbin/mkinitrd -v -f /boot/initrd-2.6.18-164.el5.img initrd-2.6.18-164.el5 )
2. Rebuild the LVM2 cache. Enter:
# vgscan -v
3.verify the filter is working fine
# lvmdiskscan
4. Recreate the initrd image to reflect the changes to the /etc/lvm/lvm.conf file. Enter:
# mkinitrd
( ex - /sbin/mkinitrd -v -f /boot/initrd-2.6.18-164.el5.img initrd-2.6.18-164.el5 )
===========================
1. Install EMC Powerpath on Linux
Download the Powerpath software from EMC powerlink website. If you’ve purchased EMC support, you should have access to powerlink.
# rpm -ivh EMCpower.LINUX-5.3.0.00.00-185.rhel5.i386.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.
2. Register EMC Powerpath
Before you can use the EMC powerpath software, you should register it using the EMC Powerpath License key received when you purchased the software from EMC.
Use emcpreg tool to install EMC Powerpath license key as shown below.
# 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): **emc-powerpath-license-key**
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.
3. Verify EMC Powerpath Registration
Use EMC powermt command to check the registration as shown below.
# powermt check_registration
Key **emc-powerpath-license-key**
Product: PowerPath
Capabilities: All
4.Start the Power path service
# /etc/init.d/PowerPath start
5. Verify Multiple Paths using below commands
Once you’ve installed EMC powerpath, execute powermt display dev=all as shown below to verify whether multiple paths as displayed accordingly.
root:ngmlx003# powermt display dev=all |more
Pseudo name=emcpowerac
Symmetrix ID=000290103691
Logical device ID=15AA
state=alive; policy=SymmOpt; priority=0; queued-IOs=0;
==============================================================================
--------------- Host --------------- - Stor - -- I/O Path -- -- Stats ---
### HW Path I/O Paths Interf. Mode State Q-IOs Errors
==============================================================================
2 qla2xxx sdaa FA 10aA active alive 0 0
3 qla2xxx sdbe FA 7aA active alive 0 0
4 qla2xxx sdci FA 13aA active alive 0 0
5 qla2xxx sddm FA 4aA active alive 0 0
Pseudo name=emcpowerab
Symmetrix ID=000290103691
Logical device ID=1628
state=alive; policy=SymmOpt; priority=0; queued-IOs=0;
==============================================================================
--------------- Host --------------- - Stor - -- I/O Path -- -- Stats ---
### HW Path I/O Paths Interf. Mode State Q-IOs Errors
==============================================================================
2 qla2xxx sdab FA 10aA active alive 0 0
3 qla2xxx sdbf FA 7aA active alive 0 0
4 qla2xxx sdcj FA 13aA active alive 0 0
5 qla2xxx sddn FA 4aA active alive 0 0
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