[sclug] Better than RAID?

[Alan Pearson]

Derek

You would want to RAID these drives first (RAID5 ?).
Then run logical volume management on top of that.

Don't know why you want EVMS for a normal system when LVM2 (part of  
Suse) would be suffice.

LVM give you nice features such as 'dynamic' partitioning (logical  
volumes),  ability to create snapshots (excellent for backup, you can  
create a snapshot of a LV in seconds and mount the snapshot. Then you  
can back up the snapshot. You can also create 'point in time'  
snapshots, that you can roll back to. So if you're going to mess with  
your system config, you could create a snapshot of your root LV, do  
all the messing, and rollback to the snapshot if it goes wrong).

If you've got more than one disk in a system it PAYS to have volume  
management.
I wouldn't run an N disk system without LVM / Veritas / <insert  
volume manager here>


AlanP


On 1 Oct 2005, at 19:02, Derek M Jones wrote:

> All,
>
> I have finally built myself a system with lots of
> disc capacity.
>
> Looking around at the possible ways of future proofing
> my disc configuration (against bad blocks and incrementally
> adding bigger discs) I discovered EVMS, http://evms.sourceforge.net/
> Does anybody have any experience with using EVMS?
>
> I am unlikely to want to do all the fancy things that logical
> volume management provides.
>
> Is the performance overhead of this extra layer a big hit?
>
> System configuration below (it runs Suse 9.3 fine, but
> I plan to use version 10 when it arrives {supposed to have
> been shipped yesterday}):
>
> 8 x Seagate Barracuda 400GB Sata
> 1 x 40GB IDE Connor (I think; out of an old box)
> AMD Athlon 64 X2 Dual-Core 4400 2.2Ghz Socket 939
> Corsair TWINX2048-3200C2 TwinX (2 x 1GB) Dual Channel
> Asus A8N-SLi Premium Socket 939
> Asus GeForce 6200 TC
> Sony DRU-810A DVD+/-RW Dual Layer
> Thermaltake Silent Purepower 680W PSU
> Thermaltake Armour VA8000BWS
>
>
>
> -- 
> Derek M. Jones                              tel: +44 (0) 1252 520 667
> Knowledge Software Ltd                      mailto:derek at knosof.co.uk
> Applications Standards Conformance Testing    http://www.knosof.co.uk
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