我有一个损坏的 ubifs 分区：
[ 16.594177] UBIFS: recovery needed
[ 16.708496] UBIFS error (pid 845): ubifs_check_node: bad CRC: calculated 0x60deed4b, read 0x8709e701
[ 16.718170] UBIFS error (pid 845): ubifs_check_node: bad node at LEB 150:50696
[ 16.725830] UBIFS error (pid 845): ubifs_scanned_corruption: corruption at LEB 150:50696
[ 16.743072] UBIFS error (pid 845): ubifs_recover_leb: LEB 150 scanning failed
我已经用 nanddump utils 转储了相关的 mtd，我怎样才能找到哪个 PEB 与损坏的 LEB 相关？