Episodes
Thursday Dec 14, 2006
RAID in simple
Thursday Dec 14, 2006
Thursday Dec 14, 2006
RAID 0, RAID 1, RAID 0+1 and RAID 5 are the most common ones. * RAID 0 . It reads/writes parallel from disks. It is fast but not reliable. One disk fail, you lose all data. * RAID 1. It is a mirror-setting. All disks are duplicated. It is reliable, but needs redundant disks. * RAID 5. It reads/writes parallel to several data disks + one parity disk. One disk fail, the data can be restored. It is fast and relatively reliable. Two disks fail, you lose all data. * RAID 0+1 . It combines RAID 0 and RAID 1. It is fast and very reliable. It has higher cost on the redundant disks than RAID 5. Since the disks are relatively cheap in nowadays, RAID 0+1 is my first choice in RAID setting.