On Sun, Dec 16, 2007 at 12:49:13PM +0000, ibnerazi wrote:
> I am new to Linux and very new to the RAID world.
>
> For a small-to-midrange(80-195 users) enterprise suggestions and
> recommendations are required for the following
>
> 1) Mail Server(Postfix)
> 1a) what would be the best and recommended RAID-level(1 or 5) of the
> volume for the Linux OS ?
> 1b) what would be the best and recommended RAID-level(1 or 5) for
> the volume that contains user's mailboxes ?
This looks VERY much like a homework question, so I'm going to give
homework help (as opposed to doing it for you) type answers.
>
> I am sharing my own plan
> for (1a)
> Linux OS "/" raid-level 1: /dev/md0 (/dev/sda1, /dev/sdb1, /dev/sdc1)
> here /dev/sdc1 is spare
Why? Remember your last sentence, speed is more important than
redundancy. What is RAID-1? Will writing to two disks increase write
speed?
Also, what is sdc1 doing? Is it also mirroring or is it just sitting
there in case one of the other disks fail?
I would ask the same question about your second choice (which I'm
snipping, as it's basically the same answer.)
Note what you wrote here....
> for my enterprise speed(read/write) is more important then
> redundancy.
Another clue that it is probably a homework question--most businesses
hate to buy that one extra disk if you don't demonstrate that you need
it.
Note to posters for the future. In general we frown upon homework
questions, though if you say, I have this and I'm lost in figuring out
the reason, many people will help. We are also, in general,
understanding when your boss suddenly requires something which you don't
know how to do. Generally speaking, honesty about the situation is more
likely to get an answer, since many of us stay on these lists because we
like helping people.
>
--
Scott Robbins
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