+ disk_close_t close; ///< Disk deinit.
+
+ pgaddr_t page_size; ///< Size of a disk page, in bytes.
+ pgcnt_t page_count; ///< Number of pages on disk.
+
+ /**
+ * Page allocation array.
+ * This array must be allocated somewhere and
+ * must have enough space for page_count elements.
+ * Is used by the filesystem to represent
+ * the entire disk in memory.
+ */
+ pgcnt_t *page_array;