Hello. I'm new to use and examine EXADATA database. That EXADATA Oracle Sun Fire X4720 M3 SAS, Oracle 11gr2 RAC database installed. But db is not working.
When they give me that machine, it was closed. Cluster can't be opened, I'm examining celldisks. When i give command `list griddisk` I see that result.
cellcli> list griddisk
DATA_DM01_00_mycelldisk01 proactive failure
DATA_DM01_01_mycelldisk01 active
DATA_DM01_02_mycelldisk01 active
.....
RECO_DM01_00_mycelldisk01 proactive failure
RECO_DM01_01_mycelldisk01 active
RECO_DM01_02_mycelldisk01 active
cellcli> list alerthistory where alertSequenceID=40 DETAIL;
....
alertDescription "Hard disk entered poor performance status"
alertMessage "Hard disk entered poor performance status"
severity: critical
......
....
what should i do? Which document or file should i look to find more detail errors. Thanks