Raid 5?

[nownot]

Does (or will) Leopard or Snow Leopard server have the ability to do software raid 5? So if I install either on my mac pro and fill sata ports w/ 1 tb hd's will I be able to create a software raid 5, thanks for any input.

 

[belvdr]

It doesn't look like it. However RAID 10 is available and a good choice.

 

[uberamd]

I've never liked software raid to be honest. As I type this my XServe RAID is creating a 2TB hardware RAID 5 array

 

[belvdr]

I've never liked software raid to be honest.

Me either.

As I type this my XServe RAID is creating a 2TB hardware RAID 5 array

That's it?

 

[nownot]

correct me if I'm wrong but with raid 10 you loose the space of half of the hd's where as with raid 5 you loose 1 ...... right?

 

[belvdr]

correct me if I'm wrong but with raid 10 you loose the space of half of the hd's where as with raid 5 you loose 1 ...... right?

Correct, but where RAID 5 lacks in writing, RAID 10 shines. Additionally RAID 10 has much less overhead than RAID 5, as no parity needs to be calculated.

 

[nownot]

Correct, but where RAID 5 lacks in writing, RAID 10 shines. Additionally RAID 10 has much less overhead than RAID 5, as no parity needs to be calculated.

true but
6 x 1.5 tb raid 5 = 7.5 tb
6 x 1.5 tb raid 10 = 4.5 tb

kinda hurts

 

[belvdr]

true but
6 x 1.5 tb raid 5 = 7.5 tb
6 x 1.5 tb raid 10 = 4.5 tb

kinda hurts

true but
6 x 1.5 tb slow raid 5 = 7.5 tb
6 x 1.5 tb fast raid 10 = 4.5 tb

Seriously though, on a software RAID, RAID 5 tends to chew up some CPU, whereas RAID 10 does not. It's all in what you need, but if you need RAID 5, you'll need a hardware array controller.

 

[snakesqzns]

Is ZFS an option? If so that'd be better than RAID 5 (on paper, I don't know the status of the mac ZFS implementation)