How to create a terabyte storage array?

[Soo-Hyun Choi]

Hi, Anders,

This is very good information to me and to everyone. I will try to set
up the home file server using RAID-5, and will report the outcomes
once it gets done.

Many thanks,


On 11/30/05, Anders Karlsson <trudheim at gmail.com> wrote:
> On 11/30/05, Soo-Hyun Choi <shchoi at gmail.com> wrote:
> > Thanks for your reply.
>
> No problem,
>
> > Okay, then it would be better to go for RAID-5 instead of just RAID-0.
>
> RAID-5 is somewhat more fault tolerant shall we say. :)
>
> > How did you set up your RAID system? What sort of process should I
> > follow?
>
> How did I set my system up? When I installed Breezy, and I got to the
> partition part, I partitioned each of the two discs with a 2GB first
> partition, and the second partition was what was left on each disc. I
> set both partitions on both discs to be RAID candidates. Then I
> created the two mirrors, put a ext3 filesystem on the first one (md0,
> 2GB, root fs) and marked the second (md1, 73GB) as an LVM PV. From
> that point on, I created the VG and all the LV's as per normal.
>
> I only used two 80GB discs and I used RAID-1 (mirroring), but the
> process for a RAID-5 array is the same.
>
> When you install the system, I would suggest you do the following, get
> 5 x 250GB discs, PATA or SATA is up to you and dependent on the disc
> controllers you have or will get for this project.
> If you get PATA discs, get five high quality 80-wire cables.
> Personally, I would only put one disc per IDE port on the controller
> cards.
>
> If you use SATA discs, you have little option, one disc per SATA
> port/cable I believe.
>
> When you install your system, I do not think you can put your root
> filesystem on a RAID-5 unit, so you can do one out of two things. Get
> a sixth disc, 20-40GB is more than adequate, install the OS on that,
> create your RAID-5 array on the five big discs. Alternatively, create
> a small (512MB - 2.0GB) partition on each of the five discs and make a
> five-way mirror to use as a root filesystem.
> All other filesystems you can have on the RAID-5 device.
>
> > So, if there is a WinXP client, would this person also be able to gain
> > an access to this RAID disk array?
>
> If you create a filesystem and export it via SAMBA or NFS (would
> require a NFS client on the XP system) - yes.
>
> > Thanks again,
>
> HTH,
>
> --
> Anders Karlsson <trudheim at gmail.com>
>
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