J. Andrew Rogers wrote:
> Do these features make a difference? Far more than you would imagine.
> On one postgres server I just upgraded, we went from a 3Ware 8x7200-RPM
> RAID-10 configuration to an LSI 320-2 SCSI 3x10k RAID-5, with 256M
Is raid 5 much faster than raid 10? On a 4 disk array with 3 data disks
and 1 parity disk, you have to write 4/3rds the original data, while on
raid 10 you have to write 2 times the original data, so logically raid 5
should be faster.