[K12OSN] RAID5 so slow?

[Mella]

I have Intel hardware RAID controller with SCSI disks. Even more, it is 64bit Intel® RAID Controller SRCZCR.
 ( http://www.intel.com/design/servers/buildingblocks/srczcr/index.htm )

Data measured against Adaptec 32bit SCSI controller.



From: Chris Thomas <cwt137 at yahoo.com>
>What makes Raid 5 so slow is that it takes a lot of
>cpu power to calculate the checksum on the fly. I
>assume you are doing software raid 5, which makes it
>even slower. I would get a pci raid controler that has
>hardware raid support (not all pci raid cards are
>hardware based raid controllers). This will make Raid
>5 much faster. But it will never be as fast as Raid0.