I have Debian squeeze 6.0.4, 4x WD RE4 500Gb 7200RPM, Athlon II X4 600E and 24GB RAM DDR3.
Since I work with SW raid 5, it takes much more CPU, than I think is enough.
How can I get know, how much CPU performance and CPU time my Software RAID 5 takes?
Do you think is there so big difference in performance between Phenom II X4 905e with L3 cache and Athlon II X4 600e without L3?
Do you think it will consume more CPU time, when using more different disks instead of same type, mark and series?
Is there difference between Raid 5 with 4 same disks from WD instead of RAID 5 with 4 different disks from hitachi, WD, samsung and seagate? True is, that 4 different disks could be maybe slower, than 4 same disks, but maybe more secure.
(we are speaking about Software linux raid on debian squeeze) Thank you