Re: Q: Hard Disc Layout for Tjener? (Raid)
Am Dienstag, den 13. Juli hub Ralf Gesellen'setter folgendes in die Tasten:
Hi Ralf!
> Hi and thanks for your hints.
> I'll buy 4 disks 36 GB each - this is the maximum amount of free slots
> in a FSC TX150. Klaus advises to use a PCI RAID controller (Adaptec)
> whilst my dealer says, the on board controller does well. I'd rather
> trust Klaus herein - but further opinions are welcome.
It would be wise to use a special RAID controller, to ensure, that the
card does what it should :)
Adaptec might be a good choice.
> Can I run 4 disks in a RAID-5 Array?
Sure.
You can use > 3 disc in RAID 5.
> How much space I get if I have 36GB disks?
Calculate RAID sizes:
RAID 0: (Striping)
==================
* at least two discs.
* Summerize all disc sizes.
* If one disc failes, GAME OVER.
RAID 1: (Mirroring)
===================
* two disc (normally equal size)
* Size of the smaller disc (maximum the size of one disc,
if they have the same size.
* If one disc failes, replace it and be happy.
RAID 5: (distributed space management)
======================================
* at least 3 disc (normally equal size)
* If all disc have the same size
size(RAID) = (n - 1 / n) * disc size.
* If one disc failes, replace it and be happy.
So you would have ~108GB useable space.
Ciao
Max
--
Follow the white penguin.
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