Exadata Flash card or Damaged hard drive replacement steps

Exadata Hard disk or Flash card replacement

To turn off storage cell

first we need to take grid disk offline

Login as celladmin or root and check the status of grid disks using

cellcli -e list griddisk attributes name,asmmodestatus,asmdeactivationoutcome

It should show Online and yes

If it shows dropped then it means there is a bad drive

Replace the drive first

Let it rebalance

To check rebalance status

select INST_ID, OPERATION, STATE, POWER, SOFAR, EST_WORK, EST_RATE, EST_MINUTES from GV$ASM_OPERATION;


Once rebalance complete

run verify the status again

cellcli -e list griddisk attributes name,asmmodestatus,asmdeactivationoutcome

If everything is online and yes

Then take grid disks offline

cellcli -e alter griddisk all inactive

cellcli -e list griddisk


Now you should see offline

Now you can reboot the server


Note: See how long your maintenance takes place

If it is more than 3.6 hours please make sure you change the settings on asm diskgroup so that it will just sync back everything once it comes online

To check the configured time

select dg.name,a.value from v$asm_diskgroup
dg, v$asm_attribute a where dg.group_number=a.group_number and
a.name='disk_repair_time';


To change the time.. Do this to all the diskgroups

ALTER DISKGROUP DATA SET ATTRIBUTE 'DISK_REPAIR_TIME'='8.5H';



After maintenance

Make all grid disks active

cellcli -e alter griddisk all active

check status

cellcli -e list griddisk attributes name, asmmodestatus


You might see some of the disks are syncing.. Give it some time and re check it should be done fairly soon..


There will not be db downtime if you have asm redundancy set to normal or high..