RAID Setup for Beginners: RAID 0, 1, 5 Configurations
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RAID confuses most people. Here's the simple version: RAID 0 for speed, RAID 1 for safety, RAID 5 for both. Choose wisely.
What is RAID?
RAID = multiple drives working together for speed or protection. Mirroring copies data across drives. Striping splits data across drives for faster reads. Parity uses math to reconstruct lost data.
Combines 2x4TB drives into 1x8TB. Speed: 2× faster reads/writes. Safety: ZERO — one drive fails, all data gone. Use for: video editing scratchpads, temporary projects. Never for important data.
RAID 1: Safety (no speed)
Mirrors 2x4TB drives (one copies the other). Safety: one drive fails, other keeps working. Speed: same as single drive (no improvement). Use for: critical backups, business data, archives.
RAID 5: Both (requires 3+ drives)
Stripes 4x4TB drives + parity = 12TB usable + 1 drive failure protection. Speed: 3× faster than single drive. Safety: one drive fails, rebuild from parity. Use for: NAS systems, media servers, business storage.
Like RAID 5 but TWO drive failures allowed. 4x4TB = 8TB usable. Slower writes than RAID 5 (double parity calculation). Use for: enterprise, irreplaceable data, large arrays (8+ drives).
RAID setup steps
1. Install matching drives (same size/model recommended). 2. Connect to NAS (Synology, QNAP) or PC with RAID controller. 3. RAID software initializes array (1-2 hours). 4. Format filesystem (NTFS, ext4). 5. Start using. RAID rebuild on failure takes hours depending on drive size.
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