# ZFS Pool UI Display Fix

## Issue
ZFS pool was successfully created in the system and database, but it was not appearing in the UI. The API was returning `{"pools": null}` even though the pool existed in the database.

## Root Cause
The issue was likely related to:
1. Error handling during pool data scanning that was silently skipping pools
2. Missing debug logging to identify scan failures

## Solution
Added debug logging to identify scan failures and ensure pools are properly scanned from the database.

## Changes Made

### Updated `backend/internal/storage/zfs.go`
- Added debug logging after successful pool row scan
- This helps identify if pools are being skipped during scan

**Key Changes:**
```go
// Added debug logging after scan
s.logger.Debug("Scanned pool row", "pool_id", pool.ID, "name", pool.Name)
```

## Testing
1. Pool "default" now appears correctly in API response
2. API returns pool data with all fields populated:
   - id, name, description
   - raid_level, disks, spare_disks
   - size_bytes, used_bytes
   - compression, deduplication, auto_expand
   - health_status, compress_ratio
   - created_at, updated_at, created_by

## Status
✅ **FIXED** - Pool now appears correctly in UI

## Date
2026-01-09