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dg can be imported on more than one system

Created: 20 Jun 2013 | 6 comments
Marianne's picture

I am posting here on behalf of a customer.

Scenario:

Solaris 10  SPARC with SF 6.0.1 Enterprise.

Storage luns are zoned to more than one system to accommodate snapshots, dg split and join.

Customer has found that a regular diskgroup (no CFS, no import with -t) can be imported on a 2nd system while imported and mounted on system 1 - no warning, no error message.

The problem obvious arises when the volumes are mounted and written to with resulting data corruption.

We have not had a chance to try and replicate the exercise in a lab environment.

Is there anybody out there with similar experience?

Operating Systems:

Comments 6 CommentsJump to latest comment

mikebounds's picture

This should not be possible as the private region contains the host of the node that has the diskgroup imported, so you should only be able to import on a second node if you use the "-C" flag to clear the host name.  When you deport a diskgroup the hostname is removed from private region so it can be imported elsewhere, so you should only use the -C flag in the case where you know the first node has crashed with diskgroup imported so host never got removed from private region.

Mike

UK Symantec Consultant in VCS, GCO, SF, VVR, VxAT on Solaris, AIX, HP-ux, Linux & Windows

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rsharma1's picture

Hi Marianne,

                      Are the hostid in /etc/vx/volboot file same for two nodes (perhaps truncated and rendered same)? I've seen this happen on a private dg with nodes having the same (truncated) hostid on HPUX.

Marianne's picture

Mike, that is my understanding as well.

rsharma1, I will ask the customer to check and let us know.

Thanks!

Supporting Storage Foundation and VCS on Unix and Windows as well as NetBackup on Unix and Windows
Handy NBU Links

Rob Abrams's picture

Hi Everyone,

I have forwarded this post to the customer and asked him to comment directly on the scenario observed and the exact sequence of events.

I know they did mention to me that they were able to reproduce the issue.

Thanks,

Rob.

rsharma1's picture

Hi,

            Did we hear back anything from the customer yet?

hildaqu's picture

Hi, if it can be reproduced, why not ask CU to repro it and collect the VRTSexplorer for further diagnose?