[Novalug] SCSI RAID system

[Ed T. Toton III]

Thus spake Alvin Smith:

> On 6/22/07, Jay Hart <jhart at kevla.org> wrote:
>> 
>> I have two drives that are the same, Seagate Model ST32550WC.
>> 
>> I can install one on a SCSI III ultra wide bus, using a 68 pin to 80 
>> pin adapter.  the other drive I can hook up via a 50 pin to 68 pin 
>> adapter.
>> 
>> Question, if I do this, meaning I have the two drives on seperate SCSI 
>> buses, will I be able to use them in a RAID 0 configuration?
>
> Jay,
>
> I would have to yes:
> http://www.linuxhomenetworking.com/wiki/index.php/Quick_HOWTO_:_Ch26_:_Linux_Software_RAID
> http://edseek.com/archives/2004/02/26/linux-software-raid-quick-raid-0/

For software RAID, linux doesn't really care where the devices are 
located, so that will really only come into consideration in terms of the 
performance you seek. Having them on separate controllers should be just 
fine.

Personally I don't much like RAID 0 because it doubles your chances of a 
catastrohpic failure, but if you're specifically aiming for the 
performance gains that it offers, and don't much care about the 
reliability difference, it certainly has its niche.

An alternative is to put them both into LVM instead of RAID 0, which is 
more of a concatenation rather than striping, so you don't necessarily get 
the same performance gains, but you also have the option of moving the 
disks in and out of the volume (assuming you have sufficient free space to 
allow that).



Crap, this is an old thread... oops! :)

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- Ed T. Toton III, RHCE --|-- www.necrobones.com -- ed.toton.org -
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