Which three actions should you perform in sequence?

DRAG DROP
You have a server that runs Windows Server 2012 R2.
You need to create a volume that will remain online if two disks in the volume fail. The
solution must minimize the number of disks used to create the volume.
Which three actions should you perform in sequence? (To answer, move the appropriate
three actions from the list of actions to the answer area and arrange them in the correct
order.)

DRAG DROP
You have a server that runs Windows Server 2012 R2.
You need to create a volume that will remain online if two disks in the volume fail. The
solution must minimize the number of disks used to create the volume.
Which three actions should you perform in sequence? (To answer, move the appropriate
three actions from the list of actions to the answer area and arrange them in the correct
order.)

Answer: See the explanation

Explanation:
Box 1: Add five physical disks.

Box 2: Create a virtual disk.
Box 3: Create a storage space by using the default disk allocation.

A storage space with three-way mirroring can tolerate two disk failures but requires a
minimum of five disks.
References:
http://technet.microsoft.com/en-us/library/hh831739.aspx
http://technet.microsoft.com/en-us/library/jj822938.aspx
http://technet.microsoft.com/en-us/library/jj899886.aspx
http://technet.microsoft.com/en-us/library/5de72fb5-e1e3-43a7-a176-d17cdf4d312e



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Jay

Jay

add five physical disks
create a storage space by using the default disk allocation
create a virtual disk

Mike

Mike

The question says we “must minimize the number of disks used to create the volume”. To me I would think I could use 3 disks in mirror with a hot spare. This solution is using only 3 disks but could withstand two disks failing.

Can someone explain what is wrong with:
1. Add three physical disks
2. Create a storage space and set the disk allocation of one of the disks to Hot Spare
3. Create a Virtual Disk

Renato

Renato

Mike, look this part of question: “online if TWO disks in the volume fail”. Parity you need:
2 disks + 1 disk (parity) = 3 disks

This question you have two disk fail

5 disks > 2 fails, you have?? 3 disks (2 disks + 1 parity).

Mike

Mike

Right – that would be true if you used RAID 5 but if you used RAID 1 with two disks – mirrored and One as the hot swap you could continue to run even if 2 disks failed.

WellBowledShane

WellBowledShane

MIke is correct. it does say use the minimum number of disks. mirror volume will do it under 3 disks.

Ricky

Ricky

FAIL.

What if 2 disks fail at the same time? At RAID 1, if both the primary disks failed, then even if the hot swap comes online, it’s got nothing to copy the data from.

xoo

xoo

so whats the right answer?

1. Add three physical disks
2. Create a storage space and set the disk allocation of one of the disks to Hot Spare
3. Create a Virtual Disk

Phillip

Phillip

Hot spare would not protect against two simultaneous disk failures…

“Mirror spaces require at least two disks (per tier if you use storage tiers) to protect you from a single disk failure. To protect a virtual disk from two simultaneous disk failures, you need at least three disks (per tier), with a minimum of five disks total in the pool to maintain pool metadata.”

http://social.technet.microsoft.com/wiki/contents/articles/11382.storage-spaces-frequently-asked-questions-faq.aspx