Hello Toasters
We have an old 3040 running as a single controller in a lab. The head had previously been part of an HA pair and the NVRAM6 card was therefore installed in slot 3 (correct for HA systems). For a single controller the card is supposed to be in slot 1.
I'm curious to know what the controller is doing with the NVRAM card? Is it using it at all or just writing everything through straight to disk? Could this cause slower than expected performance?
Thanks, Steve
__ Background Info __
A colleague recently asked advice on some poor performance with this system in his VMware lab and the first thing that jumps out is the log messages complaining about the card being in the wrong slot. This misconfiguration will be corrected shortly.
The system is running 8.1.4 7-mode if that make a difference. The controller has 2 loops of DS14MK4 shelves (168 15K FC drives) and is serving handful iSCSI LUNs to a small vSphere cluster (2 ESXi servers).
While looking at stats in OCSM 3.2, I observed >100ms iSCSI write latency with a load of ~300 IOPS and very low CPU utilisation (<20%). -------------------------------------------------------------------------------- This e-mail message has been scanned for Viruses and Content and cleared by MailMarshal --------------------------------------------------------------------------------
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