🚀 go-pugleaf

Shaman wrote in message <37F548BD.AFB2D67@ihug.co.nz>...
>Hi
>
>Anyway back to the topic (RAid 1 vs 5; write performance  and overall
>performance for a file and print server with a hardware RAID card.)
>
>I was aware of the need to calculate parity during the write in RAID 5 but
I
>thought the ability to write a small peice of the whole file to each disk
(in
>RAID 5) would be more significant timewise.


You are correct if the RISC onboard the HW RAID 5 controller is fast enough.

>Does RAID 5 ever get better than RAID 1,  as you add disks?


At 3 disks RAID 5 be faster IF the RISC is fast.

>ie RAID 1 vs   a  8  Disk RAID 5
>is RAID 1 still better?


RAID 1 likely wont be faster even at 2 disks if the RISC is fast.


>Jim Pappe wrote:
>
>> with Raid 5 plus hot spare - 2 drive can fail ..
>> www.raidexpert.com
>>
>> Mark Landin <m555@earthlink.net> wrote in message
>> news:37e660eb.12904299@news.earthlink.net...
>> > On Fri, 17 Sep 1999 07:54:19 +0100, "Steven Perez"
>> > <steve@uninet.demon.co.uk> wrote:
>> >
>> > >Kenneth:
>> > >
>> > >Go with RAID 1/0  Stripe, and mirror. This will give the very best
>> > >performance, and availability, although it will give the least amount
of
>> > >storage.
>> >
>> > How is RAID 0/1 more "available" than RAID 5?