EMC – Silly things you can do with stress testing – Part 2
I’ve got a bunch of graphs that indicate you can do some bad things to EFDs when you run certain SQLIO stress tests against them and compare the results to FC disks. But EMC is pushing back on the...
View ArticleVMware, EMC PowerPath/VE, PSODs and a hot-fix
I’m not sure why I missed this but I’m nothing if not extremely ignorant from time to time. We’ve been getting occasional Purple Screens on our ESXi hosts running 4.1 and EMC PowerPath/VE 5.4 SP2....
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Cisco MDS blades are being returned …
I was going to write a long and angsty post about how I think Cisco should be publicly villified for their continued publication of specs that don’t add up, but I’ll leave that to analysts who know...
View ArticleQNAP – How to repair RAID brokenness – Redux
I did a post a little while ago (you can see it here) that covered using mdadm to repair a munted RAID config on a QNAP NAS. So I popped another disk recently, and took the opportunity to get some...
View ArticleEMC – FAST Cache and LUN expansion or shrink operations
Someone on twitter asked me about a white paper they were reading on the EMC site recently that suggested that LUN expansion or shrink operations would require that FAST Cache be disabled. The white...
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EMC – Broken Vault drive munts FAST Cache
Mat sent me an e-mail this morning, asking “why would FAST Cache be degraded after losing B0 E0 D2 in one of the CX4-960s?”. For those of you playing at home 0_0_2 is one of the Vault disks in the CX4...
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EMC – CX4 FAST Cache cosmetic issues and using /debug
I noticed that one of our CX4s was exhibiting some odd behaviour the other day. When looking at the System Information window, I noticed that FAST Cache seemed broken. Here’s a picture of it. Going to...
View ArticleQNAP – Upgrading Firmware via the CLI
For some reason, I keep persisting with my QNAP TS-639 II, despite the fact that every time something goes wrong with it I spend hours trying to revive it. In any case, I recently had an issue with a...
View ArticleVMware – vSphere 5.5 U2 – Resetting the SSO Password
In a previous post I talked about deploying custom SSL certs into a vCenter 5.5 environment. As I was working through the update steps, the Certificate Automation Tool kept bombing out when updating...
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VMware – SRM 5.8 – You had one job!
The Problem A colleague of mine has been doing some data centre failover testing for a customer recently and ran into an issue with VMware’s Site Recovery Manager (SRM) 5.8 running on vSphere 5.5 U2....
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