which CPU for XOR?

2006-06-09 Thread Dexter Filmore
What type of operation is XOR anyway? Should be ALU, right? So - what CPU is best for software raid? One with high integer processing power? Dex -- -BEGIN GEEK CODE BLOCK- Version: 3.12 GCS d--(+)@ s-:+ a- C+++() UL+ P+++ L+++ E-- W++ N o? K- w--(---) !O M+ V- PS++(+)

raid 5 read performance

2006-06-09 Thread Raz Ben-Jehuda(caro)
Neil hello Sorry for the delay. too many things to do. I have implemented all said in : http://www.spinics.net/lists/raid/msg11838.html As always I have some questions: 1. mergeable_bvec I did not understand first i must admit. now i do not see how it differs from the one of raid0.

Re: which CPU for XOR?

2006-06-09 Thread H. Peter Anvin
Followup to: [EMAIL PROTECTED] By author:Dexter Filmore [EMAIL PROTECTED] In newsgroup: linux.dev.raid What type of operation is XOR anyway? Should be ALU, right? So - what CPU is best for software raid? One with high integer processing power? Something with massive wide vector

Re: raid 5 read performance

2006-06-09 Thread Neil Brown
On Friday June 9, [EMAIL PROTECTED] wrote: Neil hello Sorry for the delay. too many things to do. You aren't alone there! I have implemented all said in : http://www.spinics.net/lists/raid/msg11838.html As always I have some questions: 1. mergeable_bvec I did not understand

Failed Hard Disk... help!

2006-06-09 Thread David M. Strang
Hello all... I'm looking for a suggestion or two... I have a server running with 2 Western Digital WD4000YR drives running a RAID1 mirror... the other day, I was lucky enough to have one of the drives fail. Being as they are new(er) drives, they are still under warrenty, and I'm looking to do

Re: Failed Hard Disk... help!

2006-06-09 Thread David M. Strang
/Patrick wrote: pretty sure smartctl -d ata -a /dev/sdwhatever will tell you the serial number. (Hopefully the kernel is new enough that it supports SATA/smart, otherwise you need a kernel patch which won't be any better...) Yep... 2.6.15 or better... I need the magical patch =\. Any other

Re: Failed Hard Disk... help!

2006-06-09 Thread Luca Berra
On Fri, Jun 09, 2006 at 07:44:40PM -0400, David M. Strang wrote: /Patrick wrote: pretty sure smartctl -d ata -a /dev/sdwhatever will tell you the serial number. (Hopefully the kernel is new enough that it supports SATA/smart, otherwise you need a kernel patch which won't be any better...)