RAID 0 Calculator
RAID 0 stripes data across every drive. You get the full raw capacity and the highest sequential throughput, and no protection: if any one drive fails, the whole array is lost.
RAID 0 at a glance
- 4 × 8TB in RAID 0 = 32TB usable (29.1 TiB), 100% of raw capacity; survives no drive failures.
- 100TB usable from 8TB drives in RAID 0 takes 13 drives (104TB usable).
Identical drives; decimal TB as drives are sold, binary TiB as most operating systems show it; before filesystem overhead. Hot spares are extra drives and add no capacity.
RAID 0 usable capacity by drive count
| Drives | 1.92TB | 3.84TB | 8TB | 12TB | 16TB | 24TB |
|---|---|---|---|---|---|---|
| 2 | 3.84TB | 7.68TB | 16TB | 24TB | 32TB | 48TB |
| 3 | 5.76TB | 11.52TB | 24TB | 36TB | 48TB | 72TB |
| 4 | 7.68TB | 15.36TB | 32TB | 48TB | 64TB | 96TB |
| 6 | 11.52TB | 23.04TB | 48TB | 72TB | 96TB | 144TB |
| 8 | 15.36TB | 30.72TB | 64TB | 96TB | 128TB | 192TB |
| 12 | 23.04TB | 46.08TB | 96TB | 144TB | 192TB | 288TB |
Usable capacity in decimal TB, before filesystem overhead. — means the drive count is not valid for RAID 0.
RAID 0 formula
Usable capacity = n × S. Minimum 2 drives. Fault tolerance: none. Example: 4 × 8TB = 32TB (29.1 TiB).
When RAID 0 makes sense
Scratch space, render caches and other data you can recreate or restore quickly. Every added drive is another single point of failure, so the risk grows with the drive count. Do not use RAID 0 for data that exists only on that array.
8TB drives for this array
In-stock 8TB drives from our catalogue, with the price for the 13 drives in the example above. Hot spares are extra.
- 858384-B21 HP 8TB 7200RPM SAS 12Gb/s 3.5-inch Hard Drive $160.00 each · 13 drives $2,080.00
- 861609-001 - HP 8TB 7200RPM SATA-6Gb/s SC Midline Hot-Swappable 3.5-inch Hard Drive $200.00 each · 13 drives $2,600.00
- 00WK785 - IBM 8TB 7200RPM SAS 12Gb/s 3.5-inch Hard Drive $168.88 each · 13 drives $2,195.44
- ST8000NM000A - Seagate Exos 7E8 8TB 7200RPM SATA 6Gb/s 256MB Cache 512e 3.5-inch Hard $250.53 each · 13 drives $3,256.89
- 7301585 - Sun 8TB 7200RPM SAS 12Gb/s 3.5-inch Hard Drive $189.47 each · 13 drives $2,463.11
- MG05ACA800E - Toshiba 8TB 7200RPM SATA 6Gb/s 128MB Cache 3.5-inch Hard Drive $252.63 each · 13 drives $3,284.19
- HUH721008AL4205 - Hitachi Hitachi Ultrastar He10 8TB 7200RPM SAS 12Gb/s 256MB Cache TCG $215.16 each · 13 drives $2,797.08
- WD80EAZZ - Western Digital Blue PC Desktop 8TB 5640RPM SATA 6Gb/s 128MB Cache 3.5-inch $271.58 each · 13 drives $3,530.54
Frequently asked questions
How many 24TB drives do I need for 100TB in RAID 0?
5 drives, giving 120TB (109.14 TiB), before filesystem overhead, with no redundancy.
What happens if one drive in a RAID 0 array fails?
The array is lost. Each file is split across every drive, so no file is complete without all of them.
Is RAID 0 faster than RAID 10?
For writes, usually yes: RAID 0 writes each block once, RAID 10 writes it twice. RAID 10 gives up half the capacity to survive drive failures.
How many drives can fail in RAID 0?
None. One failed drive loses the whole array.
RAID calculators by level
- RAID calculator (all levels)
- RAID 1 calculator
- RAID 5 calculator
- RAID 6 calculator
- RAID 10 calculator
- RAID 50 calculator
- RAID 60 calculator
RAID planning guides
- How Many Drives Can Fail in Each RAID Level?
- RAID Hot Spare: What It Does and How It Affects Capacity
- TB vs TiB: Why a 24TB Drive Shows 21.8 TiB
- RAID Write Penalty by Level
- Best RAID Level for 2, 3, 4, 5, 6 or 8 Drives
- RAID 50 vs RAID 60
- RAID 6 vs RAID 60
Related
Updated 2026-10-22.