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Re: Help with RAID and Formating Disks

On 05/10/2007, Michael Acklin <freeop@swbell.net> wrote:
> Hello all. I am very new at what I am attempting to do. I have run
> Debian in the past and just recently installed it on a new built system
> that I am setting up. So please take it easy on the Newbie.
> First I built the system with the ASUS Motherboard and AMD-64x2 5800+.
> Added 3 - 500gig drives and a DVD/CD writer to access the Downloaded
> netinst of Debian. The installation went fine with no problems over the
> internet installation. Added all the programs that I thought I would
> need and finished the installation. During the installation process it
> formatted /dev/sda as ext3 and used the complete disk for the
> system/files. I was never given the opportunity to format/partition the
> second and third drives. Figured I would get to that when I set up the RAID.
> Anyway tried using mdadm but am at a loss what I am trying to do. I
> tried the parameters that was called out in the --help file, but kept
> getting "not enough devices" errors. I believe the command line I used was:
> mdadm -create /dev/md0 -l 5 -n 2 -x 1 -c 32
> and in different combo's of the above.
> I then figured that as /dev/sdb and /dev/sdc where not partitioned or
> formatted, I should do that. But that is where I am completely lost. I
> have no idea how to format or partition the other drives.
> Tried finding some tools that might help out, but couldn't find anything
> that might help. I know I am not using the terminology correctly to
> search for the right tools. So came here to see if anyone could help out.
> So I guess my question is: Do I have to format/partition each of the
> drives before making a RAID or can the mdadm program do this. And what
> is the easiest way to set up the RAID.
> I figured I could set it up with 2 500gig drives and have the 3rd as the
> spare. This system is going to be used for backing up different systems
> over the net with BACKUPPC and figured 1 Tb of storage should be enough.
> Any help would be greatly appreciated. Thanks...

Might I suggest you look into evms? Its a realy easy tool to use to
configure discs and set up raid. It's not available from the install
but is configurable afterwards.


24x7x365 != 24x7x52 Stupid or bad maths?
<erno> hm. I've lost a machine.. literally _lost_. it responds to
ping, it works completely, I just can't figure out where in my
apartment it is.

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