3 ms·
Nitpick: RAID-5 and RAID-6 don't use "parity disks". They stripe the parity across every disk, just like RAID-0 stripes data, so you lose a disk worth of capaci
by aaronmdjones 7y ago
Nitpick: RAID-5 and RAID-6 don't use "parity disks". They stripe the parity across every disk, just like RAID-0 stripes data, so you lose a disk worth of capacity (or two disks worth of capacity in RAID-6), but the parity is on every disk. Having a disk dedicated to parity would be an incredibly burdensome write bottleneck, which is exactly what RAID-4 is, and why you probably haven't heard of it.