Ouchy

From: Steven M. Caesare [mailto:[email protected]]
Sent: Monday, August 08, 2011 2:44 PM
To: NT System Admin Issues
Subject: Dell PowerConnect & iSCSI

Just to advise the list:

Dell has pulled their 4.x.x.x versions of firmware for their 10Gb PowerConnect 
switches. There are known issues with flow control, and they can fail under 
high load after having been in service for extended periods of time.

This is particularly triggered in iSCSI environments. In our case it was Dell's 
own EqualLogic SAN's that killed them for us. For some time the EqualLogic and 
PowerConnect groups disagreed on which firmware was "good". We finally got them 
to talk and v3.1.4.16 has their blessing.

Of course, the syntax was changed significantly between v3.x.x.x and 4.x.x.x, 
thus if you are already at 4 you cannot export your current configuration and 
re-import on the downgraded v3 chassis. You must manually reconfigure.

Here's pulling for a successful downgrade tonight...

-sc

PS- I claim this is NT related because we have NT boxen mounting iSCSI LUN's 
via these switches :)


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