http://www.nimblestorage.com/blog/customers/non-disruptive-upgrade-to-nimble-storages-first-deployed-array/ Accelerate Apps, Store and Protect More Data And Empower IT with Flash-Optimized Nimble Storage Tue, 15 Oct 2013 23:51:41 +0000 hourly 1 http://wordpress.org/?v=3.4.1 http://www.nimblestorage.com/blog/customers/non-disruptive-upgrade-to-nimble-storages-first-deployed-array/#comment-4506 Nimble Storage - An In Depth Review - Post 3 - dorkfolio Thu, 19 Sep 2013 20:22:17 +0000 http://www.nimblestorage.com/blog/?p=5769#comment-4506 [...] Anyway, the chassis has two controllers that are hot-swappable in the back in an Active / Passive configuration. Most SANs are Active / Active, and for those of you who are uncomfortable with this, in a nutshell, here is how the controller works. As data is written, it is first written to NVRAM, which is mirrored across controllers – these means that if Controller A drops out in the middle of a write, Controller B already has the exact same data in NVRAM and therefore nothing is lost. The failovers are absolutely seamless. We have done several test failovers and there is absolutely 0 interruption. The controllers are housed in the back of the unit and slide out. These can be upgraded at any time should your infrastructure need it (IE, you can go from a CS240 to a CS440 just by swapping controllers). This can be done hot. [...] [...] Anyway, the chassis has two controllers that are hot-swappable in the back in an Active / Passive configuration. Most SANs are Active / Active, and for those of you who are uncomfortable with this, in a nutshell, here is how the controller works. As data is written, it is first written to NVRAM, which is mirrored across controllers – these means that if Controller A drops out in the middle of a write, Controller B already has the exact same data in NVRAM and therefore nothing is lost. The failovers are absolutely seamless. We have done several test failovers and there is absolutely 0 interruption. The controllers are housed in the back of the unit and slide out. These can be upgraded at any time should your infrastructure need it (IE, you can go from a CS240 to a CS440 just by swapping controllers). This can be done hot. [...]

]]> http://www.nimblestorage.com/blog/customers/non-disruptive-upgrade-to-nimble-storages-first-deployed-array/#comment-4153 Chris Fricke Thu, 01 Aug 2013 22:22:04 +0000 http://www.nimblestorage.com/blog/?p=5769#comment-4153 Interesting. I have the first shipped out of state arrays (a pair of CS240s that arrived in May 2010). I wonder if I should bug the guys about upgrading my controllers too :) Interesting. I have the first shipped out of state arrays (a pair of CS240s that arrived in May 2010). I wonder if I should bug the guys about upgrading my controllers too

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