still working on the UI error

internal/zfs/service.go

@@ -185,6 +185,10 @@ func (s *Service) CreatePool(name string, vdevs []string, options map[string]str
 		options = make(map[string]string)
 	}
 
+	// Add -f flag to force creation even if devices have existing filesystems
+	// This handles cases where devices are "in use" or contain "unknown filesystem"
+	args = append(args, "-f")
+
 	// If mountpoint is not explicitly set, use dedicated storage directory
 	mountpoint := options["mountpoint"]
 	if mountpoint == "" {
@@ -218,8 +222,26 @@ func (s *Service) CreatePool(name string, vdevs []string, options map[string]str
 
 	// Create the pool
 	_, err := s.execCommand(s.zpoolPath, args...)
+
+	// Even if creation reports an error, check if pool actually exists
+	// Sometimes ZFS reports errors but pool is still created
 	if err != nil {
-		return err
+		// Check if pool exists despite the error
+		if existingPools, listErr := s.ListPools(); listErr == nil {
+			for _, pool := range existingPools {
+				if pool.Name == name {
+					// Pool exists! Log the original error but don't fail
+					log.Printf("warning: pool creation reported error but pool %s exists: %v", name, err)
+					err = nil // Clear error since pool was created
+					break
+				}
+			}
+		}
+
+		// If pool doesn't exist and we still have an error, return it
+		if err != nil {
+			return err
+		}
 	}
 
 	// Pool created successfully - now try to set mountpoint and mount if needed