Put the following steps in the right order:

You are asked to enable Write Back Flash Cache for one of your customers X3-2 Full Rack in a
rolling fashion. Put the following steps in the right order:
A) Set flashCacheMode to writeback.
B) Inactivate all grid disks and shut down cellsrv.
C) Drop the Flash Cache.
D) Verify that cell for flashcacheMode is writeback.
E) Create the Flash Cache.
F) Start up cellsrv and activate all grid disks.

G) Check grdidksk asmdeactivationoutcome and asmmodestatus for all grid disks to ensure that
all grid disks on all cells are set to Yes and online, respectively.

You are asked to enable Write Back Flash Cache for one of your customers X3-2 Full Rack in a
rolling fashion. Put the following steps in the right order:
A) Set flashCacheMode to writeback.
B) Inactivate all grid disks and shut down cellsrv.
C) Drop the Flash Cache.
D) Verify that cell for flashcacheMode is writeback.
E) Create the Flash Cache.
F) Start up cellsrv and activate all grid disks.

G) Check grdidksk asmdeactivationoutcome and asmmodestatus for all grid disks to ensure that
all grid disks on all cells are set to Yes and online, respectively.

A.

G.
B, C, A, F, E, D, and G

B.
G, A, B, C, F, E, D,and G

C.
G, C, B, A, F, E, D, and G

D.
G, E,C, B, F, A, D,and G

Explanation:
Steps for Enabling Write back flash cache:
First of all,you don’t need the stop CRS or database (This is ROLLING method) ,you can do it cell
by cell.
* (C)drop flashcache
CellCLI> drop flashcache
Flash cache owtcel03_FLASHCACHE successfully dropped
* (G)Be sure asmdeactivationoutcome is YES is before disabling grid disk
</pre>
CellCLI> list griddisk attributes name,asmmodestatus,asmdeactivationoutcome
* (B)
CellCLI> alter griddisk all inactive

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Syed Jaffer Hussain

Syed Jaffer Hussain

C

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Vishal Verma

Vishal Verma

C

Log in as the root user to the first cell to be enabled for write back flash cache.

Check that the flash cache is in normal state and no flash disks are degraded or in a critical state using the following command:

# cellcli -e LIST FLASHCACHE detail

Drop the flash cache for all cells using the following command:

# cellcli -e DROP FLASHCACHE

Inactivate the grid disks on the cell using the following command:

# cellcli -e ALTER GRIDDISK ALL INACTIVE

Shut down CELLSRV services using the following command:

# cellcli -e ALTER CELL SHUTDOWN SERVICES CELLSRV

Set the flashCacheMode attribute to writeback using the following command:

# cellcli -e “ALTER CELL FLASHCACHEMODE=writeback”

Restart cell services using the following command:

# cellcli -e ALTER CELL STARTUP SERVICES CELLSRV

Reactivate the grid disks on the cell using the following command:

# cellcli -e ALTER GRIDDISK ALL ACTIVE

Recreate the flash cache using the following command:

# cellcli -e CREATE FLASHCACHE ALL

Check the status of the cell using the following command:

# cellcli -e LIST CELL DETAIL | grep flashCacheMode

The flashCacheMode attribute should be set to writeback.

Check the grid disk attributes asmDeactivationOutcome and asmModeStatus before moving to the next cell using the following command:

LIST GRIDDISK ATTRIBUTES name,asmdeactivationoutcome,asmmodestatus

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