Oracle Linux 7 上 iSCSI LUN 上的文件系统损坏

将 LUN 重新映射到其他 LUN-ID/SCSI-ID 而不重新扫描主机上的 SCSI 总线可能会造成发生原因 数据损坏

原始映射：
::> lun mapping show
Vserver   Path                    Igroup   LUN ID  Protocol
---------- ----------------------------------------  -------  ------  --------
svm_linux  /vol/vol_linux/lun1            linux_iscsi  1 iscsi
svm_linux  /vol/vol_linux/lun2            linux_iscsi  2 iscsi

新映射：
::> lun mapping show
Vserver   Path                    Igroup   LUN ID  Protocol
---------- ----------------------------------------  -------  ------  --------
svm_linux  /vol/vol_linux/lun1            linux_iscsi  2 iscsi
svm_linux  /vol/vol_linux/lun2            linux_iscsi  1 iscsi

操作系统消息 / 错误：
Oct 12 19:16:08 linux_host kernel: sd 6:0:0:4: Warning! Received an indication that the LUN assignments on this target have changed. The Linux SCSI layer does not automatically remap LUN assignments
...
Oct 12 19:16:17 linux_host kernel: blk_update_request: critical target error, dev sdas, sector 2097151736 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
Oct 12 19:16:17 linux_host kernel: buffer_io_error: 4 callbacks suppressed
Oct 12 19:16:17 linux_host kernel: Buffer I/O error on dev sdas, logical block 262143967, async page read

应用程序错误 / 警报日志：
Corrupt block relative dba: 0x00000001 (file 0, block 1)

/u01/app/oracle/admin/diag/db/trace/db.trc:
Bad header found during control file header read
Data in bad block:
 type: 6 format: 2 rdba: 0x00811624
 last change scn: 0x0000.11124c54 seq: 0x1 flg: 0x06
 spare1: 0x0 spare2: 0x0 spare3: 0x0
 consistency value in tail: 0x10800601
 check value in block header: 0x5cef
 computed block checksum: 0x0
Detected a media corrupt controlfile block (block# 1) in '/u05/oradata/db/control02.ctl'