EqualLogics strikes back - twice

We have had an ongoing issue with our EqualLogics systems where they have a massive disk latency problem. We have narrowed this down to 11 second periods where there is no network activity on the controllers. We have passed all the information to Dell but are still without a fix.

This problem has been with us from the start across all the firmware revisions. The most affected system is the system that receives the most replication traffic, had has the fewest live servers on it.

The only thing we have got back so far is that there is something going on with replication even though the periods we are seeing this are not confined to when replication is happening.

Dell obviously want us to upgrade to the latest firmware but this is not a good idea at the moment as a replication bug has been found that appears to throttle replication to around 25MB/s which is not desirable. Dell are not acknowledging this but our suppliers are definitely seeing it and have advised us to not update to the latest firmware until they can work out what revision caused the issue.

Will post if more information is forth coming.

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