[CentOS] [OT/HW] hardware raid -- comment/experience with 3Ware

[Gordon Messmer]

On 03/12/2013 01:30 AM, Arun Khan wrote:
>
> @ Gordon - thanks for sharing this piece of info!  In case of RAID
> card failure, it is important to be able to recover the data (RAID
> device) with a compatible replacement.    Are the LSI MegaRAID
> controller more reliable in this respect?

I don't know.  I would contact LSI support or sales and see what they 
have to say about it.  I haven't had the occasion to move a disk array 
between one and another model of MegaRAID controller.

> Software RAID is an option but I don't think hot swap is possible
> without some tinkering with the mdadm tool a priori.
> The systems will go to client site (remote),  prefer to keep the
> support calls to remove/replace hardware activity :(

You're correct that adding a new disk to an mdadm array will require 
some CLI work.  Probably most hardware RAID would do this automatically. 
  I frequently do the CLI work remotely over SSH so that a local tech 
can swap the disk.