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Solution Type Problem Resolution

Solution  207278 :   Multiple disk devices reported by vxdisk list command for Veritas Volume Manager 4.1 and EMC PowerPath 4.4 or 4.5  

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Symptoms

0YV33RM Internal ID use only.

If a system has Veritas Volume Manager 4.1 and EMC PowerPath 4.4 or 4.5 installed vxdisk list command might report multiple entries for the same disk device.

Both vendors Veritas and EMC are aware of that issue.

The issue had been reported with following operations:

1.                  When discovering new disk devices without reboot through vxdctl enable. After each attempt the system might report multiple entries through the vxdisk list command.

2.                  When upgrading or reinstalling PowerPath.

3.                  When a system is rebooted with a path down.

4.                  When mapping/zoning new disks to the system.

Sample:

 # vxdisk list

 c5t1d0s2     auto      -             -            error        c5t1d0s2  

 c5t1d0s2     auto      -             -            error        c5t1d0s2  

 c5t1d0s2     auto      -             -            error        c5t1d0s2  

 c5t1d0s2     auto      -             -            error        c5t1d0s2  

 c5t1d0s2     auto      -             -            error        c5t1d0s2

 # vxdisk list c5t1d0s2

 Device:    c5t1d0s2

 devicetag: c5t1d0

 type:      auto

 flags:     online error private autoconfig

 errno:     Device path not valid

 Multipathing information:

 numpaths:   1

 c5t1d0s2        state=enabled

 # vxdmpadm listctlr all

 CTLR-NAME       ENCLR-TYPE      STATE      ENCLR-NAME

 =====================================================

 emcp            EMC             ENABLED      EMC0

 c1              Disk            ENABLED      Disk

 c0              Disk            ENABLED      Disk

 c5              EMC             ENABLED      EMC1

 c4              EMC             ENABLED      EMC1

 emcp            EMC             ENABLED      EMC1

Resolution

JJINZU7 Internal ID use only.

Download and apply Sun Point Patch 121755-06 or above at http://sunsolve.sun.com/pub-cgi/show.pl?target=point/pointsearch.

Relief/Workaround

UAXEYGK Internal ID use only.

1.                         When upgrading or reinstalling PowerPath, reboot after the initial package removal, if PowerPath requested the reboot.

2.                             

3.                         When duplicate entries are seen, a second reboot will clear the duplicates. The PowerPath pseudo device links will be available during the second reboot. 

4.                             

5.                         When mapping/zoning new LUNS to the host, to avoid duplicate entries: 

6.                   

1.            Run vxddladm stop eventsource. 

2.             

3.            Map/zone the new LUNS to the host. 

4.             

5.            Dynamically recreate the LUN device (either using cfgadm routines or HBA-specific routines to dynamically create the device nodes). 

6.             

7.            Run powermt config to discover and create the pseudo device links. 

8.             

9.            Run vxddladm start eventsource. 

10.         

7.                          

8.                          

9.                         When a host is rebooted with a path down, follow this procedure to avoid duplicate entries:

10.                

1.            Run vxddladm stop eventsource.

2.             

3.            Reconnect the paths. 

4.             

5.            Run powermt config. 

6.             

7.            Run vxddlam start eventsource. 

8.             

11.                      

12.                      

13.                     If vxddladm commands were not run, then reboot the system to remove the duplicate entries. 

14.                       

Additional Information

I92U52C Internal ID use only.

SunCluster 3.x

Please verify Sun Alert 102151 before download and apply Sun Point Patch 121755-04 or 121755-05.

In case you are not confident about the resolution engage Sun Service to assist you in verifying the conditions.

Details about Veritas Volume Manager (tm) 4.1 Maintenance Patch 1 Point Patch 1.4 at http://seer.support.veritas.com/docs/282809.htm.

Product

VERITAS Volume Manager 4.1 Software

VERITAS Storage Foundation 4.1 Software

EMC PowerPath 4.4 Software

Keywords

vxvm, powerpath, duplicate, multiple, disk, vxdisk list, vxdctl enable, 121755, 221084, emc, vxvm 4.1, 102151

Previously Published As

86896

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