Repair: IAM chain for object ID O_ID, index ID I_ID, partition ID PN_ID, alloc unit ID A_ID (type TYPE), has been truncated before page P_ID and will be rebuilt.

• 修复:在页P_ID之前截断了对象ID O_ID,索引ID I_ID,分区ID PN_ID,分配单元ID A_ID(类型为TYPE)的IAM链,并将重新生成该链。