EXADATA Flash Disk Replacement - No downtime for databases.

Below technical steps will be followed to replace the flash disk in exadata server. This activity require a restart of the cell server but there will be no downtime for databases.


Log onto cell server as a root-  
                                                                                
#cellcli -e list griddisk attributes name,asmmodestatus,asmdeactivationoutcome
Above command must say 'Yes' for all griddisks

#cellcli -e alter griddisk all inactive
#cellcli -e list griddisk attributes name,asmmodestatus,asmdeactivationoutcome
Above command should say 'offline' for all grid disks


#cellcli -e list griddisk
Above command should say 'inactive'


Power off the cell server
#shutdown -h now
Above command will shutdown the cell server


REPLACE FLASH DISK - Hardware replacement
Oracle Engineer slides the cell out from the rack
Oracle engineer removes the Flash card and inserts the new one


Cell server is powered back on
At ILOM fire the below command
start /SYS
Above commd will start the cell server


Disk sync is carried out


#cellcli -e alter griddisk all active
#cellcli -e list griddisk
Above command should show 'active'


#cellcli -e list griddisk attributes name, asmmodestatus
Above command will say OFFLINE then SYNCING then ONLINE


Full resilience is restored  and there is no interruption to service during the replacement.