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Re: OT Raid Setup for MP3 Server


  • To: ukha_d@xxxxxxx
  • Subject: Re: OT Raid Setup for MP3 Server
  • From: "graham_howe" <graham@xxxxxxx>
  • Date: Mon, 29 Apr 2002 12:43:59 -0000
  • Mailing-list: list ukha_d@xxxxxxx; contact ukha_d-owner@xxxxxxx
  • Reply-to: ukha_d@xxxxxxx

--- In ukha_d@y..., "gjggroupid" <register@r...> wrote:
> Yes, the setup util for the raid card will let you pick which
drives
> you want in or out of the array.  Just select drives 2,3,4 for the
> array.  You may get the benefit of any raid controller cache this
way
> too.
>
> The only cards i've seen are promise and adaptac for IDE.
> Adaptec 1200 doesn't do raid 5 so the Raid ATA 2400 model is the
one.
>
> GarryG
>
This is an interesting thread, though it does now look like I will
need to do a full server rebuild to take advantage of larger disks.

I did make an error in my previous post, with 2 x 80 and 1 x 60 it is
120Gb logical disk I have and not 140Gb. This means that if I swapped
the 60Gb for another 80Gb then I would gain (following a rebuild)
40Gb on the logical disk which is tempting.

For those who are interested, I have the following card:

http://www.dabs.com/products/prod-info3-info.asp?&m=y&quicklinx=14Q6

which has 6 connectors, can support disks larger than 137Gb, is
ATA100 and comes with 6 cables and 3 hot swap caddies for 310 quid
plus VAT.

As I will now have to plan an upgrade of the server anyway, and I
will have serveral disks lying about when I do it, is there a real
benefit in separating the OS from the data. The reason I went with
raid 5 in the first place was for resilliance of the OS (in this case
SBS2K so it includes Exchange, IIS, SQL) following a 'disaster' where
a hard disk failed and wiped out my server. I now have everything on
one raid 5 'disk' but I could set up the future system to have 2 x
80Gb mirrored for the SBS2K components and then 3 (or 4) x 160Gb
disks on raid 5 array for data (mainly MP3 and in future divx).

Does this give significant benefit (there is no additional cost as I
have the smaller disks already) or would I be better off just putting
everything on raid 5 as I do at the moment.

Finally (sorry if this has been answered and I missed it), can disks
be added to an existing raid 5 array after it has been set up and
data is on it? I suspect now that the answer is no, but it is worth
asking. Quite simply, I can afford to buy 3 disks sooner than 4!

Regards

Graham


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