markbase/docs/RAID_MODULE_PROGRESS.md

RAID Module Development Progress

Date: 2026-05-17

Status: Phase 1 (30% Complete)

Completed

Core Module Structure

• ✅ src/raid/mod.rs - Core interface and enums
• ✅ src/raid/controller.rs - RAID controller and array management
• ✅ src/raid/level_0.rs - RAID 0 Stripe algorithm
• ✅ src/raid/level_1.rs - RAID 1 Mirror algorithm
• ✅ src/raid/level_5.rs - RAID 5 placeholder (stub)

Implemented Features

• ✅ RaidLevel enum (0/1/5/6/10/50/60)
• ✅ MemberStatus enum (Online/Offline/Rebuilding/Failed)
• ✅ RaidAlgorithm trait (read/write interface)
• ✅ RaidController (create_array/read/write)
• ✅ RAID 0 Stripe: locate_block algorithm
• ✅ RAID 1 Mirror: read from first member, write to all

Test Infrastructure

• ✅ Test program: src/bin/raid_test.rs
• ✅ Test disks: 3 × 5GB sparseimage
• ✅ Compilation successful

Pending

Week 2: RAID 5/6

• ❌ XOR Parity calculation (parity.rs)
• ❌ RAID 5 rotating parity position
• ❌ RAID 5 reconstruction
• ❌ Reed-Solomon library (RAID 6)
• ❌ RAID 6 double parity

Week 3: Nested RAID

• ❌ RAID 10 (Mirror + Stripe)
• ❌ RAID 50 (RAID 5 + Stripe)
• ❌ RAID 60 (RAID 6 + Stripe)

Week 4: Integration

• ❌ WebDAV handler integration
• ❌ Single RAID device export
• ❌ Performance testing (AJA)
• ❌ Fault simulation

Architecture

RaidController
├── RaidArray {level, members, stripe_size}
└── RaidAlgorithm trait
    ├── Raid0.read/write (Stripe)
    ├── Raid1.read/write (Mirror)
    ├── Raid5.read/write (Parity)
    ├── Raid6.read/write (Double Parity)
    └── Nested RAID implementations

Performance Target

• RAID 0: >=600 MB/s (3盘叠加)
• RAID 5: >=500 MB/s (校验开销)
• RAID 6: >=400 MB/s (双校验开销)

Next Steps

1. Implement parity.rs (XOR calculation)
2. Complete RAID 5 read/write logic
3. Add Reed-Solomon library for RAID 6
4. Test fault recovery