[CentOS] Dangerous Software Raid instructions on Wiki

Les Mikesell lesmikesell at gmail.com
Wed Aug 12 16:42:02 UTC 2009

Alan Hodgson wrote:
> Let me be even more clear - if your successor doesn't know what dd does, or 
> what drives correspond to /dev/sda and /dev/sdb in the box he's working on, 
> he has no business being within 10 feet of a production server without 
> careful supervision.

What physically corresponds to /dev/sda and /dev/sdb isn't necessarily 
predictable these days.  For example you can initialize a single drive 
as a volume with some common raid controllers, then swap that drive's 
position in the drive bays or reverse a pair and each will still show as 
the /dev/sd? device where it was initialized instead of what you'd 
expect from the current location.

   Les Mikesell
    lesmikesell at gmail.com

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