Oracle Exam 1Z0-902 Topic 10 Question 49 Discussion

Actual exam question for Oracle's 1Z0-902 exam

Question #: 49
Topic #: 10

Assume that the RDBMS and ASM instances are up and you are enabling write-back flash cache in one cell server at a time.

Which step(s) should you perform before executing the following command you your Exadata X9M-8 Database Machine, which will set the cell flash cache mode to write-back?

#cellcli --e alter cell flashCacheMode=WriteBack

AInactivate the grid disks on the cell.

BInactivate all the physical disks on the cell.

CDrop the existing flash cache on the cell.

DShut down the CELL5RV service on the cell.

EDisable the storage indexes on the cell.

FCreate a new flash cache on the cell.

Show Suggested Answer

Suggested Answer: B

According to Oracle's documentation12, ASM failure groups provide redundancy by storing mirror copies of data on different disks or storage servers. When ASM allocates an extent for a normal redundancy file, ASM allocates a primary copy and a secondary copy.ASM chooses the disk on which to store the secondary copy so that it is in a different failure group than the primary copy1.This way, if one disk or storage server fails, ASM can still access the data from another failure group2.

Therefore, the statement that is true about how ASM failure groups provide redundancy is:

Failure groups contain all ASM disks in a single storage server preventing mirror copies being written to the same storage server.

by Lino at Sep 09, 2024, 12:09 AM

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Yolando

20 days ago

I believe dropping the existing flash cache on the cell might also be necessary to avoid any conflicts with the new settings.

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Gussie

20 days ago

I agree with Leota. Inactivating the grid disks will ensure data integrity before making the change.

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Leota

22 days ago

I think we should inactivate the grid disks on the cell before setting the flash cache mode to write-back.

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