在rman中執(zhí)行delete noprompt obsolete出現(xiàn)了如下報錯：
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of delete command at 12/30/2013 13:51:36
RMAN-06091: no channel allocated for maintenance (of an appropriate type)
原因是存在其他類型的備份，需要分配維護(hù)通道再進(jìn)行刪除
因此命令需要加上devicetype disk：
RMAN> delete noprompt obsolete device type disk;