adaptec Archives - AWS Managed Services by Anchor

Bugfixing the in-kernel megaraid_sas driver, from crash to patch

By | Technical | 2 Comments

Today we bring you a technical writeup for a bug that one of our sysadmins, Michael Chapman, found a little while ago. This was causing KVM hosts to mysteriously keel over and die, obviously causing an outage for all VM guests running on the system. The bug was eventually traced to the megaraid_sas driver and the patch has made it to the kernel as of version 3.3. As you can imagine, not losing a big stack of customer VMs at a time, possibly at any hour of the day, is a pretty exciting prospect. This will be a very tech-heavy post but if you’ve ever gone digging into kernelspace (as a coder, or someone on the ops side of the fence) we hope it’ll pique your interest. We’ll talk about…

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Tales of Hardware – IBM x3650

By | Technical | No Comments

All the servers Anchor buys are from Supermicro. Most people won’t have heard of them, but they’re a sizeable hardware vendor that also does some OEM gear. Supermicro certainly doesn’t carry the mindshare of other big brands like HP, Dell, et al., but we chose them because their stuff is reliable and affordable – we focus on the things that actually matter, rather than some enterprise-y idea of sticking with big brands that you trust – “noone ever got fired for buying IBM” they say. Actually, hold that thought for a moment.

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