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Mounting Raw Devices On RHEL with EMC Strorage



·       Step # 2: Download the latest EMC Power Path Software and Install them on the nodes

       Path -->  http://powerlink.emc.com--> Products à Downloads ( based on the OS version)

     Install the Power Path Software (as given below )

[root@db01 EMCPowerPath]# tar xf EMCPower.LINUX.5.6.GA.b143.gz
[root@db01 EMCPowerPath]# ls -ltr
total 112240
-r--r--r-- 1 nobody nobody  9945245 Mar 25  2011 EMCPower.LINUX-5.6.0.00.00-143.
-r--r--r-- 1 nobody nobody 22392284 Mar 25  2011 EMCPower.LINUX-5.6.0.00.00-143.
-r--r--r-- 1 nobody nobody  7201040 Mar 25  2011 EMCPower.LINUX-5.6.0.00.00-143.
-r--r--r-- 1 nobody nobody 18216828 Mar 25  2011 EMCPower.LINUX-5.6.0.00.00-143.
-rw-r--r-- 1 root   root   57024083 May 15 15:07 EMCPower.LINUX.5.6.GA.b143.gz
[root@db01 EMCPowerPath]# rpm -ivh EMCPower.LINUX-5.6.0.00.00-143.RHEL5.x86_64
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

·   Step # 2  Register the Power Path Software

[root@db01 EMCPowerPath]# 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-VVVV-GGGG-CCCC-MMMM-RRRR
1 key(s) successfully added.
Key successfully installed.

Key (Enter if done):
1 key(s) successfully registered.
[root@db01 EMCPowerPath]# powermt check_registration

Key B2PW-VB43-RF3K-QF39-ME9S-RBT6
  Product: PowerPath
  Capabilities: All

·          Start the Power Path
[root@db01 EMCPowerPath]# /etc/init.d/PowerPath start
Starting PowerPath:  done

Step # 3    List the LUNS that are currently presented to this node

[root@db01 EMCPowerPath]# powermt display dev=all

# This should show all EMC Psuedo names instead of drive names #

Pseudo name=emcpowerr
Symmetrix ID=000192601485
Logical device ID=0358
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
==============================================================================
   4 qla2xxx                  sdam      FA  3hB   active  alive       0      0
   3 qla2xxx                  sdn       FA 14hB   active  alive       0      0

Pseudo name=emcpowerb
Symmetrix ID=000192601485
Logical device ID=0359
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
==============================================================================
   4 qla2xxx                  sdan      FA  3hB   active  alive       0      0
   3 qla2xxx                  sdo       FA 14hB   active  alive       0      0

Pseudo name=emcpowerq
Symmetrix ID=000192601485
Logical device ID=035A
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
==============================================================================
   4 qla2xxx                  sdao      FA  3hB   active  alive       0      0
   3 qla2xxx                  sdp       FA 14hB   active  alive       0      0

Pseudo name=emcpowerp
Symmetrix ID=000192601485
Logical device ID=0533
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
==============================================================================
   4 qla2xxx                  sdap      FA  3hB   active  alive       0      0
   3 qla2xxx                  sdq       FA 14hB   active  alive       0      0

Pseudo name=emcpowero
Symmetrix ID=000192601485
Logical device ID=053B
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
==============================================================================
   4 qla2xxx                  sdaq      FA  3hB   active  alive       0      0
   3 qla2xxx                  sdr       FA 14hB   active  alive       0      0

·       Step # 4   If the node is showing the device names (e.g /dev/sdc )along with the Pseudo names then disable the native device’s and allow the pseudo name ONLY as given below.

[root@db01 ~]# /etc/lvm/lvm.conf

# By default we accept every block device:   à Disable
    #filter = [ "a/.*/" ]

    # Add this line so that the system see’s the drives with Pseudo name ONLY  #  à ADD
     filter = [ "a|/dev/emcpower.*|", "a|/dev/sda2$|", "r|.*|" ]

·      Step # 5   Check if the node is only listing the pseudo names for the LUNS attached

[root@db01 ~]# lvmdiskscan

  /dev/emcpowera  [       33.00 GB]
  /dev/emcpowerq  [      100.00 GB]
  /dev/sda2       [      136.02 GB] LVM physical volume
  /dev/emcpowerb  [       33.00 GB]
  /dev/emcpowerr  [      100.00 GB]
  /dev/emcpowerc  [       30.00 GB]
  /dev/emcpowers  [      100.00 GB]
  /dev/emcpowerd  [        3.00 GB]
  /dev/emcpowert  [      250.02 GB]
  /dev/emcpowere  [      100.00 GB]
  /dev/emcpoweru  [      250.02 GB]
  /dev/emcpowerf  [       30.00 GB]
  /dev/emcpowerv  [      250.02 GB]
  /dev/emcpowerg  [       33.00 GB]
  /dev/emcpowerw  [      250.02 GB]
  /dev/emcpowerh  [       33.00 GB]
  /dev/emcpowerx  [       30.00 GB] LVM physical volume
  /dev/emcpoweri  [       33.00 GB]
  /dev/emcpowery1 [       40.00 GB] LVM physical volume
  /dev/emcpowerj  [       33.00 GB]
  /dev/emcpowerk  [       33.00 GB]
  /dev/emcpowerl  [       33.00 GB]
  /dev/emcpowerm  [       33.00 GB]
  /dev/emcpowern  [       33.00 GB]
  /dev/emcpowero  [        3.00 GB]
  /dev/emcpowerp  [        3.00 GB]
  23 disks
  0 partitions
  1 LVM physical volume whole disk
  2 LVM physical volumes

·       Step # 6 Creating Physical Volume

   Ø  pvcreate /dev/emcpowerr

Syntax à PVCREATE /dev/ Pseudo name

·       Step # 7   Creating Volume Group

   Ø   vgcreate vg-raw3 /dev/emcpowerr

Syntax à VGCREATE <VGNAME> <PV PATH>

·       Step # 8 Creating LV’s with 100 Space

   Ø    lvcreate -l100%VG -n lv.raw3 vg-raw3

Syntax à lvcreate –l1--%VG –n <LV NAME> <VG NAME>

·       Step # 9   Converting  the RAW device to Raw Volume

Syntax  à raw <raw volume path> <complete LV Patch>

  Ø  raw  /dev/raw/raw3 /dev/vg-raw3/lv.raw3
  Ø  raw  /dev/raw/raw3 /dev/vg-raw3/lv.raw3
  Ø   raw  /dev/raw/raw4 /dev/vg-raw4/lv.raw4
  Ø   raw  /dev/raw/raw10 /dev/vg-raw10/lv.raw10
  Ø   raw  /dev/raw/raw100 /dev/vg-raw100/lv.raw100
  Ø   raw  /dev/raw/raw101 /dev/vg-raw101/lv.raw101
  Ø   raw  /dev/raw/raw102 /dev/vg-raw102/lv.raw102
  Ø   raw  /dev/raw/raw103 /dev/vg-raw103/lv.raw103
  Ø   raw  /dev/raw/raw104 /dev/vg-raw104/lv.raw104 
  Ø   raw  /dev/raw/raw105 /dev/vg-raw105/lv.raw105
  Ø   raw  /dev/raw/raw106 /dev/vg-raw106/lv.raw106
  Ø   raw  /dev/raw/raw107 /dev/vg-raw107/lv.raw107
  Ø   raw  /dev/raw/raw108 /dev/vg-raw108/lv.raw108
  Ø   raw  /dev/raw/raw109 /dev/vg-raw109/lv.raw109

·        Step # 10 Set  the permission’s using the “userid:group” and provide 755 permission to each raw volumes

[root@db02 raw]# ls –ltr

[root@db02 raw]# chown ora:dba /dev/raw/raw3
[root@db02 raw]# chown ora:dba /dev/raw/raw4
[root@db02 raw]# chown ora:dba /dev/raw/raw10
[root@db02 raw]# chown ora:dba /dev/raw/raw100
[root@db02 raw]# chown ora:dba /dev/raw/raw101
[root@db02 raw]# chown ora:dba /dev/raw/raw102
[root@db02 raw]# chown ora:dba /dev/raw/raw103
[root@db02 raw]# chown ora:dba /dev/raw/raw104
[root@db02 raw]# chown ora:dba /dev/raw/raw105
[root@db02 raw]# chown ora:dba /dev/raw/raw106
[root@db02 raw]# chown ora:dba /dev/raw/raw107
[root@db02 raw]# chown ora:dba /dev/raw/raw108
[root@db02 raw]# chown ora:dba /dev/raw/raw109

[root@db02 raw]# chmod 755 /dev/raw/raw3
[root@db02 raw]# chmod 755 /dev/raw/raw4
[root@db02 raw]# chmod 755 /dev/raw/raw5
 [root@db02 raw]# chmod 755 /dev/raw/raw10
[root@db02 raw]# chmod 755 /dev/raw/raw100
[root@db02 raw]# chmod 755 /dev/raw/raw101
[root@db02 raw]# chmod 755 /dev/raw/raw102
[root@db02 raw]# chmod 755 /dev/raw/raw103
[root@db02 raw]# chmod 755 /dev/raw/raw104
[root@db02 raw]# chmod 755 /dev/raw/raw105
[root@db02 raw]# chmod 755 /dev/raw/raw106
[root@db02 raw]# chmod 755 /dev/raw/raw107
[root@db02 raw]# chmod 755 /dev/raw/raw108
[root@db02 raw]# chmod 755 /dev/raw/raw109

total 0
crwxr-xr-x 1 ora dba 162,   3 May 17 01:29 raw3
crwxr-xr-x 1 ora dba 162,   4 May 17 01:32 raw4
crwxr-xr-x 1 ora dba 162,  10 May 17 01:33 raw10
crwxr-xr-x 1 ora dba 162, 100 May 17 01:38 raw100
crwxr-xr-x 1 ora dba 162, 101 May 17 01:39 raw101
crwxr-xr-x 1 ora dba 162, 102 May 17 01:40 raw102
crwxr-xr-x 1 ora dba 162, 103 May 17 01:41 raw103
crwxr-xr-x 1 ora dba 162, 104 May 17 01:42 raw104
crwxr-xr-x 1 ora dba 162, 105 May 17 01:43 raw105
crwxr-xr-x 1 ora dba 162, 106 May 17 01:44 raw106
crwxr-xr-x 1 ora dba 162, 107 May 17 01:44 raw107
crwxr-xr-x 1 ora dba 162, 108 May 17 01:47 raw108
crwxr-xr-x 1 ora dba 162, 109 May 17 01:47 raw109

Thanks & Regards
Avinash Pillai
URL : http://avinashpillai.blogspot.com
Email: avinashp25[AT]gmail[DOT]com




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