[CentOS] Software RAID complete drives or individual partitions
Les Mikesell
lesmikesell at gmail.com
Wed Mar 6 21:12:26 UTC 2013
On Wed, Mar 6, 2013 at 2:42 PM, John R Pierce <pierce at hogranch.com> wrote:
>> AFAIK you need to use a GPT for partitions with >2TB ...
>
> you need GPT to partition devices larger than 2TB, regardless of the
> parittion size.
>
> me, I use parted....
>
> # parted /dev/sdc "label gpt"
> # parted /dev/sdc -a none "mkpart primary 512s -1s"
>
> to make a single full disk partition that starts at sector 512, which is
> 256K bytes, which is usually a decent boundary for SSDs, large raids,
> and other such devices.
Large drives often have 4k sectors - don't you want a 1M offset to
make sure the partition start is aligned? Gparted seems to do that
by default. Also, is it possible to make the raid auto-assemble at
boot like smaller ones do? I had to put an ARRAY entry into
/etc/mdadm.conf with the devices but I think someone advised doing
"set <partition number> raid on" in parted.
--
Les Mikesell
lesmikesell at gmail.com
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