Generally it's a good idea to keep firmware up to date for components like storage controllers. But just like you would never put an Exchange 2013 cumulative update into production without testing, you would never apply a fireware update without checking... or would you? Well, if you use IBM storage you might have run into a situation where DAG replication was affected by a firmware update. We can all learn from this - like what to do when replication goes bad and how to manage firmware updates better.
The IBM service bulletin titled “Affected ServeRAID controllers inadvertently supported hard drive sector size 512e and 4k - IBM Servers” has got to be a masterpiece of how to obscure a support statement. I’m sure it is written by someone who is awfully literate in all aspects of storage but it sure does an excellent job of disguising the issues in a mass of incoherent text.
read more............http://windowsitpro.com/blog/how-flawed-firmware-can-really-give-your-dag-some-replication-headaches
The IBM service bulletin titled “Affected ServeRAID controllers inadvertently supported hard drive sector size 512e and 4k - IBM Servers” has got to be a masterpiece of how to obscure a support statement. I’m sure it is written by someone who is awfully literate in all aspects of storage but it sure does an excellent job of disguising the issues in a mass of incoherent text.
read more............http://windowsitpro.com/blog/how-flawed-firmware-can-really-give-your-dag-some-replication-headaches