VMware: Change IOPS Limit From 1000 to 1
Mar28

VMware: Change IOPS Limit From 1000 to 1

KB ID 0001532 Problem I got asked to do this by a client this week, HP has requested that this be set for connections to their Storevirtual VSA that had been having some problems. Solution I followed the instructions and was at first confused because I could not see the settings that needed changing? That’s because this only applies if you have MULTIPATHING enabled and set to ‘Round Robin’. So if your storage does...

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Disable ATS Heartbeat
Mar22

Disable ATS Heartbeat

KB ID 0001529 Problem After ESX 5.5 Update 2, VMware added ATS Heartbeat.Some vendors, (like HPE SureStore and VSA) recommend that this is disabled. I can’t find any info about whether it’s safe to do this in production, so to be on the safe side I placed the hosts in maintenance mode first. Enter Maintenance Mode Use the following command; vim-cmd /hostsvc/maintenance_mode_enter Disable ATS Heartbeat Use the following...

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HPe Synergy 12000 MPIO QSFP to 10GB SFP Setup
Dec17

HPe Synergy 12000 MPIO QSFP to 10GB SFP Setup

KB ID 0001495 Problem I was recently involved in deploying an HPe Synergy 12000 Frame. And the network connections from it were ‘a little unusual’ so I thought I’d document that here, to save anyone else the problems I had. I was connecting to an HP/Aruba 5412 switch so my cables were all HP/Aruba (to be on the safe side). What you can see (above) is the MPIO Cable (K2Q46A P/N 800867-001) fixed onto the left (and...

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HP MSA 2000 G2 Firmware update loop
Nov17

HP MSA 2000 G2 Firmware update loop

KB ID 0000248 Dtd 12/05/10 Problem Seen on HP MSA2324sa G2. You attempt to upgrade the firmware on this unit and, it applies to the first controller, that restarts and then it constantly tries to update the other controller. Solution If you’re reading this then you’re probably already in an upgrade loop? The fist step is to stop it looping then sort the firmware out. 1. Remove controller B (bottom one) from the SAN,...

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HP StorageWorks P2000 – Connecting to and Configuring
Nov17

HP StorageWorks P2000 – Connecting to and Configuring

KB ID 0000569 Dtd 10/02/12 Problem Normally I simply connect a new MSA to a clients network, and it gets it’s address from DHCP. Then I can get the address for the DHCP Scope, and point my web browser at it. Yesterday I was starting with new virtual infrastructure and had no DHCP. With the G1 and G2 models, you got a console/serial cable and could just terminal in. With the G3 they have replaced the serial socket with a mini USB...

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HP MSA P2000 (G3) Error – ‘Unwritable write-back cache data exists for a volume’
Nov17

HP MSA P2000 (G3) Error – ‘Unwritable write-back cache data exists for a volume’

KB ID 0000817 Dtd 20/05/13 Problem Seen on a G3 P2000 SAN, the client had also had an MSA70 shelf, which contained a failed array. I was removing the MSA and after the job, this error was getting logged. Unwritable write-back cache data exists for a volume (vdisk: unknown name, volume: unknown name, SN {Serial Number} it comprises {number}% of cache. Solution Essentially, there was data in the cache that needed writing to the...

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