Monthly Archives: November 2014

Cisco releases update for its SAN switches to fix the Shellshock aka Bashbug

Cisco MDS

Although I was triggered by a daily update I received from EMC in this knowledge base article: https://support.emc.com/kb/194669, it was Cisco who finally published an update for various firmwares that did not have a fix yet for the shellshock aka bashbug.
You can find all Release Notes on the Cisco site at http://www.cisco.com/c/en/us/support/storage-networking/mds-9000-nx-os-san-os-software/products-release-notes-list.html.
The EMC version of the Release Notes can be found here:

If you haven’t upgraded yet, I’d plan to do so in the very near future!

How to start copy to hotspare manually

Hard Drive

I recently had to manually invoke a hot spare in a VNX 5200, but in Unisphere the option was greyed out.

Unisphere_No-CopyToHotSpare

On the CLI the command wasn’t supported. Now what?

CopyToHotSpare_fail

According to https://support.emc.com/kb/184890 the proper command is now

naviseccli -h [ip of one SP] copytodisk [source-disk] [hot spare]

CopyToDisk_Success

Using the “getdisk” command will show you the actual rebuild has started.

Bare in mind that the way to address disks is in the format “Bus_Enclosure_Disk”, so for example 1_2_3 means disk 3 (the 4th disk) in enclosure 2 on bus 1.

In Unisphere you can actually see the progress of the rebuild:

Disk Rebuild in Unisphere

The Science of ‘Interstellar’ Explained

Warning: SPOILER ALERT! This infographic contains details about the new space film “Interstellar.”

The film “Interstellar” relies on real science for many of its stunning visuals. Physicist Kip Thorne, an expert on black holes and wormholes, provided the math that the special effects artists turned into movie magic.

The spaceship Endurance’s destination is Gargantua, a fictional supermassive black hole with a mass 100 million times that of the sun. It lies 10 billion light-years from Earth and is orbited by several planets. Gargantua rotates at an astounding 99.8 percent of the speed of light.

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