ORA-27626: Exadata error : 2201 (IO cancelled due to slow/hung disk) (Doc ID 1925661.1)

Last updated on NOVEMBER 22, 2016

Applies to:

Oracle Exadata Storage Server Software - Version 11.2.3.3.1 and later
Information in this document applies to any platform.
WARNING in 12.1.1.1.1 also includes the key phrase “Exadata error:'IO cancelled due to slow/hung disk'”

Symptoms

RDBMS alert log reports the many I/O errors similar to the following:

Errors in file /u01/app/oracle/diag/rdbms/dbfsd/DBFSD1/trace/DBFSD1_ora_29673.trc:
ORA-27603: Cell storage I/O error, I/O failed on disk o/192.168.10.7;192.168.10.8/DBFS_DG_CD_00_exa1celadm3 at offset 9038766080 for data length 131072
ORA-27626: Exadata error: 2201 (IO cancelled due to slow/hung disk)
WARNING: Read Failed. group:2 disk:0 AU:2152 offset:12623872 size:131072
path:o/192.168.10.7;192.168.10.8/DBFS_DG_CD_00_exa1celadm3
     incarnation:0xe96bdabc asynchronous result:'I/O error'
     subsys:OSS krq:0x7f667ae88390 bufp:0x6a900000 osderr1:0x899 osderr2:0x0
WARNING: failed to read mirror side 1 of virtual extent 24506 logical extent 0 of file 268 in group [2.3879414525] from disk DBFS_DG_CD_00_EXA1CELADM3  allocation unit 2152 reason timed-out; if possible, will try another mirror side

 

Related RDBMS trace file filled with ORA-27603 & ORA-27626 errors:

ORA-27603: Cell storage I/O error, I/O failed on disk o/192.168.10.7;192.168.10.8/DBFS_DG_CD_00_exa1celadm3 at offset 7625695232 for data length 131072
ORA-27626: Exadata error: 2201 (IO cancelled due to slow/hung disk)
ORA-27603: Cell storage I/O error, I/O failed on disk o/192.168.10.7;192.168.10.8/DBFS_DG_CD_00_exa1celadm3 at offset 7626088448 for data length 131072
ORA-27626: Exadata error: 2201 (IO cancelled due to slow/hung disk)
ORA-27603: Cell storage I/O error, I/O failed on disk o/192.168.10.7;192.168.10.8/DBFS_DG_CD_00_exa1celadm3 at offset 7625433088 for data length 131072
ORA-27626: Exadata error: 2201 (IO cancelled due to slow/hung disk)
ORA-27603: Cell storage I/O error, I/O failed on disk o/192.168.10.7;192.168.10.8/DBFS_DG_CD_00_exa1celadm3 at offset 7625957376 for data length 131072

 

Changes

 Recently upgraded to Exadata Storage Version 11.2.3.3.1

Cause

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