Serial Split Brain detected in solaris10


 
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Operating Systems Solaris Serial Split Brain detected in solaris10
# 50  
Old 04-03-2010
That's very good.

Now a couple of observations on your setup.

1. Mixing internal and external disks in a volume is a bad idea ( prefereably not in the same DG )

2. If you have to use the internal disks put the log plex on the external disks with one data disk and the spare on the internal disks.

The reason for both of the above is that if you get a failure it is more likely to be consistent. Even if the external disks all fail you should be able to pull the internal disks and reattach the external ones. You will be able to rebuild the one internal data disk from parity.

If you can avoid using the internal disk at all then do. A failure of the external disks is likely to be self consistent in such a scenario and is much easier to recover.

3. Get the SCSI csi controller checked and check for patches for bugs that cause controller failure-like sysmptoms it is likely the original cause of your problem was one or other.

---------- Post updated at 04:10 AM ---------- Previous update was at 04:06 AM ----------

Quote:
Originally Posted by upengan78
That worked fine as well. no errors at mount command. Also, I can create files/ directories/rmdir ..worked out fine.


Many thanks! Appreciate your help really!!...God bless you.
You're welcome. It's always rewarding to get to the bottom of a problem and all the more enjoyable if the person at the other end doesn't panic or get flustered.
# 51  
Old 04-05-2010
Quote:
Now a couple of observations on your setup.

1. Mixing internal and external disks in a volume is a bad idea ( prefereably not in the same DG )

2. If you have to use the internal disks put the log plex on the external disks with one data disk and the spare on the internal disks.

The reason for both of the above is that if you get a failure it is more likely to be consistent. Even if the external disks all fail you should be able to pull the internal disks and reattach the external ones. You will be able to rebuild the one internal data disk from parity.

If you can avoid using the internal disk at all then do. A failure of the external disks is likely to be self consistent in such a scenario and is much easier to recover.

3. Get the SCSI csi controller checked and check for patches for bugs that cause controller failure-like sysmptoms it is likely the original cause of your problem was one or other.
Thank you for your valuable suggestions. I certainly agree.

Problem was that, I wanted some sort of redundancy raid 5 or mirror atleast but I found I am not gaining much by using mirror so I went with raid 5 but then I found I am not getting enough disk space for my data, so I used 2 internal disks for this raid 5 volume.

I now have the backup of data on this volume, if there is anything which can done now, I am willing to do it. Please suggest if you can .

Thanks again.Smilie
# 52  
Old 04-05-2010
What you have is mostly ok, you are using one internal disk and the spare is on an internal disk.

In order to a bit more useful/safer you'd need to resize (shrink) the raid 5 volume by a small amount in order to make space for the log plex on one of the external disks.

You would then simply remove the existing log plex then re-add it on one of the external disks. No need to restore, this can all be done on-the-fly.
# 53  
Old 04-05-2010
Quote:
Originally Posted by reborg
What you have is mostly ok, you are using one internal disk and the spare is on an internal disk.

In order to a bit more useful/safer you'd need to resize (shrink) the raid 5 volume by a small amount in order to make space for the log plex on one of the external disks.

You would then simply remove the existing log plex then re-add it on one of the external disks. No need to restore, this can all be done on-the-fly.
Okay, Thank you for your advise. I will look into this. At least, this will be better than my current configuration, if not completely safe/useful.Smilie

Good day!Smilie
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