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SFCFSRAC vxfentsthdw script causes node hang when configure I/O fencing

giobuon
Level 2
Partner

Hi all,

Here my specs:

OS: RHEL 6.1

Veritas: VRTS_SF_HA_Solutions_5.1_SP1_PR2_RHEL.tar.gz

Patch: vm-rhel6_x86_64-5.1SP1PR2P1-rpms.tar.gz

DiskArray: IBM DS5020

Multipath: rdac-LINUX-09.03.0C05.0504-source.tar.gz

 

When using vxfentsthdw in order to configure I/O fencing on node 1, node 2 hang on "Expect no writes for disk /dev/sdh on node rhclt02" step

Here is output on node 1:

Testing rhclt01 /dev/sdh rhclt02 /dev/sdh
Evaluate the disk before testing ........................ No Pre-existing keys
Register keys on disk /dev/sdh from node rhclt01 ....................... Passed
Verify registrations for disk /dev/sdh on node rhclt01 ................. Passed
Read from disk /dev/sdh on node rhclt01 ................................ Passed
Write to disk /dev/sdh from node rhclt01 ............................... Passed
Read from disk /dev/sdh on node rhclt02 ................................ Passed
Write to disk /dev/sdh from node rhclt02 ............................... Passed
Reserve disk /dev/sdh from node rhclt01 ................................ Passed
Verify reservation for disk /dev/sdh on node rhclt01 ................... Passed
Read from disk /dev/sdh on node rhclt01 ................................ Passed
Read from disk /dev/sdh on node rhclt02 ................................ Passed
Write to disk /dev/sdh from node rhclt01 ............................... Passed
Expect no writes for disk /dev/sdh on node rhclt02

 

I cannot boot node 2 up until clear persistence reservation keys on /dev/sdh. In the past I can use this script without problem using the same config except Vertias 5.0, RHEL 5.3 and rdac 09.03.0C05.0042

Please help!

Thank you,

giobuon.

4 REPLIES 4

Gaurav_S
Moderator
Moderator
   VIP    Certified

Is there any specific switch you are using with vxfentsthdw ?

Is /dev/sdh the same disk from both the nodes ? It may happen that dev/sdh is different on first node & second node, you can confirm using vxscsiinfo utility...

 

G

giobuon
Level 2
Partner

I used vxfentsthdw without any options.

vxscsiinfo script confirm that is the same disk on both nodes.

 

Regards,

giobuon

Gaurav_S
Moderator
Moderator
   VIP    Certified

I searched however didn't found any known issues around this ...

Have you verified that you are using the correct array settings as recommeneded in hardware technote or HCL ?

I don't see any obvious reason here for node to hang, if the settings of array are the recommended ones from Symantec, I would suggest to open a support case..

 

Gaurav

jstucki
Level 4

You may have to disable DMP for the DS5020 LUNs, to prevent conflicts between DMP and RDAC.  Have you tried VxVM/DMP without RDAC?

Also, in reading the VRTSaslapm_Technote_v11.pdf document, http://www.symantec.com/business/support/index?page=content&id=TECH77062, it shows that for 5.1 SP1, the VRTSaslapm package for RHEL 6 requires 5.1 SP1 RP2 or higher.  So you may have to install RP2 on top of 5.1 SP1 PR2.  RP2 was released on 28-Sep-2011.  Typically, you would want to install the latest Rollup Patch set (RPx).

https://sort.symantec.com/patch/detail/5512