fixing UI and iscsi sync

internal/models/storage.go

@@ -24,19 +24,31 @@ type NFSExport struct {
 	Enabled    bool     `json:"enabled"`
 }
 
+// ISCSITargetType represents the type of iSCSI target
+type ISCSITargetType string
+
+const (
+	ISCSITargetTypeDisk ISCSITargetType = "disk" // For ZVOL/block devices
+	ISCSITargetTypeTape ISCSITargetType = "tape" // For tape library passthrough
+)
+
 // ISCSITarget represents an iSCSI target
 type ISCSITarget struct {
-	ID         string   `json:"id"`
-	IQN        string   `json:"iqn"` // iSCSI Qualified Name
-	LUNs       []LUN    `json:"luns"`
-	Initiators []string `json:"initiators"` // ACL list
-	Enabled    bool     `json:"enabled"`
+	ID         string          `json:"id"`
+	IQN        string          `json:"iqn"`  // iSCSI Qualified Name
+	Type       ISCSITargetType `json:"type"` // "disk" or "tape"
+	LUNs       []LUN           `json:"luns"`
+	Initiators []string        `json:"initiators"` // ACL list
+	Enabled    bool            `json:"enabled"`
 }
 
-// LUN represents a Logical Unit Number backed by a ZVOL
+// LUN represents a Logical Unit Number backed by various storage types
 type LUN struct {
-	ID      int    `json:"id"`      // LUN number
-	ZVOL    string `json:"zvol"`    // ZVOL name
-	Size    uint64 `json:"size"`    // bytes
-	Backend string `json:"backend"` // "zvol"
+	ID            int    `json:"id"`             // LUN number
+	ZVOL          string `json:"zvol"`           // ZVOL name (for block backstore)
+	Device        string `json:"device"`         // Device path (e.g., /dev/st0 for tape, /dev/sdX for disk)
+	Size          uint64 `json:"size"`           // bytes (0 for unknown/tape devices)
+	Backend       string `json:"backend"`        // "zvol", "block", "pscsi", "fileio"
+	Backstore     string `json:"backstore"`      // Backstore type: "block", "pscsi", "fileio" (default: "block")
+	BackstoreName string `json:"backstore_name"` // Name used in targetcli
 }