可能的原因很多，你可以 scandisks 试一下

[root@racnode1 ~]# oracleasm listdisks

[root@racnode1 ~]# oracleasm scandisks

Reloading disk partitions: done

Cleaning any stale ASM disks...

Scanning system for ASM disks...

Instantiating disk "RACDB_DATA2"

Instantiating disk "RACDB_FRA1"

Instantiating disk "RACDB_DATA1"

Instantiating disk "RACDB_ARCH1"

Instantiating disk "OCR_VOTE3"

Instantiating disk "OCR_VOTE2"

Instantiating disk "OCR_VOTE1"

[root@racnode1 ~]# oracleasm listdisks

OCR_VOTE1

OCR_VOTE2

OCR_VOTE3

RACDB_ARCH1

RACDB_DATA1

RACDB_DATA2

RACDB_FRA1