场景：
数据库当前处于存档模式。执行alter system archive log current;进行日志归档，然后对归档产生的日志文件使用dbv命令检查，报错部分信息：

页 6043 流入 - 很可能是介质损坏
Corrupt block relative dba: 0x0000179b (file 0, block 6043)
Fractured block found during dbv:
Data in bad block:
type: 1 format: 2 rdba: 0x0000179b
last change scn: 0x80d4.00000023 seq: 0xf2 flg: 0x8f
spare1: 0x0 spare2: 0x0 spare3: 0x0
consistency value in tail: 0x154200a4
check value in block header: 0x0
computed block checksum: 0x0

页 6044 标记为损坏
Corrupt block relative dba: 0x0000179c (file 0, block 6044)
Bad header found during dbv:
Data in bad block:
type: 1 format: 2 rdba: 0x0000179c
last change scn: 0x80ec.00000023 seq: 0x66 flg: 0xc1
spare1: 0x0 spare2: 0x0 spare3: 0x7ff5
consistency value in tail: 0x00100018
check value in block header: 0x22
block checksum disabled