# Phase C: Backend Core Domains - Status Report

## ✅ Completed Components

### 1. Database Schema ✅
- **Migration 002**: Complete schema for storage, SCST, and tape components
- All tables created and indexed properly

### 2. Storage Component ✅
- **Disk Discovery**: Physical disk detection via `lsblk` and `udevadm`
- **LVM Management**: Volume group listing, repository creation/management
- **Capacity Monitoring**: Repository usage tracking
- **API Endpoints**: Full CRUD for repositories
- **Bug Fixes**: JSON parsing for `lsblk` output (handles both string and number)

### 3. SCST Integration ✅
- **Target Management**: Create, list, and manage iSCSI targets
- **LUN Mapping**: Add devices to targets with proper LUN numbering
- **Initiator ACL**: Add initiators with single-initiator enforcement
- **Handler Detection**: List available SCST handlers
- **Configuration**: Apply SCST configuration (async task)
- **Verified**: All handlers detected correctly (dev_cdrom, dev_disk, vdisk_fileio, etc.)

### 4. System Management ✅
- **Service Status**: Get systemd service status
- **Service Control**: Restart services
- **Log Viewing**: Retrieve journald logs
- **Support Bundles**: Generate diagnostic bundles (async)

### 5. Authentication & Authorization ✅
- **JWT Authentication**: Working correctly
- **RBAC**: Role-based access control
- **Permission Checking**: Fixed lazy-loading of permissions
- **Audit Logging**: All mutating operations logged

### 6. Task Engine ✅
- **State Machine**: pending → running → completed/failed
- **Progress Tracking**: 0-100% progress reporting
- **Persistence**: All tasks stored in database

## 📊 Test Results

**All 11 API Tests Passing:**
- ✅ Test 1: Health Check (200 OK)
- ✅ Test 2: User Login (200 OK)
- ✅ Test 3: Get Current User (200 OK)
- ✅ Test 4: List Physical Disks (200 OK) - Fixed JSON parsing
- ✅ Test 5: List Volume Groups (200 OK)
- ✅ Test 6: List Repositories (200 OK)
- ✅ Test 7: List SCST Handlers (200 OK) - SCST installed and working
- ✅ Test 8: List SCST Targets (200 OK)
- ✅ Test 9: List System Services (200 OK)
- ✅ Test 10: Get Service Status (200 OK)
- ✅ Test 11: List Users (200 OK)

## 🔄 Remaining Components (Phase C)

### 1. Physical Tape Bridge (Pending)
**Requirements** (SRS-02):
- Tape library discovery (changer + drives)
- Slot inventory and barcode handling
- Load/unload operations
- iSCSI export via SCST
- Single initiator enforcement

**Status**: Database schema ready, implementation pending

### 2. Virtual Tape Library (Pending)
**Requirements** (SRS-02):
- MHVTL integration
- Virtual tape management
- Tape image storage
- iSCSI export via SCST
- Barcode emulation

**Status**: Database schema ready, implementation pending

### 3. Enhanced Monitoring (Pending)
**Requirements** (SRS-05):
- Alerting engine
- Metrics collection
- Enhanced health checks
- Event streaming (WebSocket)

**Status**: Basic health check exists, alerting engine pending

## 🐛 Bugs Fixed

1. **Permission Checking Bug**: Fixed lazy-loading of user permissions in middleware
2. **Disk Parsing Bug**: Fixed JSON parsing to handle both string and number for `lsblk` size field

## 📈 Progress Summary

- **Phase A**: ✅ Complete (Environment & Requirements)
- **Phase B**: ✅ Complete (Backend Foundation)
- **Phase C**: 🟡 In Progress
  - Core components: ✅ Complete
  - Tape components: ⏳ Pending
  - Monitoring: ⏳ Pending

## 🎯 Next Steps

1. **Physical Tape Bridge Implementation**
   - Implement discovery service
   - Implement inventory operations
   - Implement load/unload operations
   - Wire up API endpoints

2. **Virtual Tape Library Implementation**
   - MHVTL integration service
   - Virtual tape management
   - Tape image handling
   - Wire up API endpoints

3. **Enhanced Monitoring**
   - Alerting engine
   - Metrics collection
   - WebSocket event streaming

## 📝 Notes

- SCST is fully installed and operational
- All core storage and iSCSI functionality is working
- Database schema supports all planned features
- API foundation is solid and tested
- Ready to proceed with tape components

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**Last Updated**: Phase C - Core Components Complete, SCST Verified
**Next Milestone**: Physical Tape Bridge or Virtual Tape Library Implementation