Benefits Much better storage efficiency than RAID 1. Better reliability than RAID 0. Since data are striped at the bit level, all reads and all writes require accessing multiple disks. This has the effect that performance is worse than for single disks. Lower cost than RAID 2 Drawbacks Since there is a single disk that contains error correction data, whenever any other disk is updated, the error correction disk must also be updated.
Write performance is limited to the throughput of a single disk.
This technique allows reconstruction of all data that was present on any single drive that has failed. Benefits Much better storage efficiency compared to mirroring. Better reliability than RAID 1. Read performance is excellent. More reliable than RAID 0 Better storage efficiency than RAID 1 Lower cost than RAID 2 More performance than RAID 3 Drawbacks Since there is a single disk that contains error correction data, whenever any other disk is updated, the error correction disk must also be updated.