HOTSPOT
You have a server named Server1 that runs Windows Server 2012 R2.
Server1 has access to disks that connect to a RAID controller, iSCSI disks, and disks
connected to a SCSI controller.
You plan to use a tiered storage space on Server1.
You need to identify which storage controller and volume type you must use for the tiered
storage space.
Which storage components should you use?
To answer, select the appropriate options in the answer area.
Answer: 
Explanation:
this question is a prime example by certification questions are out of touch with reality. There are no modern servers with SCSI (unless it’s SAS). The controllers are almost always RAID, but when you use software RAID/LVM you always disable the RAID.
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Nobody in their right minds should ever use software RAID at all. In the Microsoft books, it is even mentioned that software RAID is a ‘poor man’s RAID solution’ and that “in most real-world scenarios, hardware RAID is used”.
Unless, ofcourse, your data is of little to no importance whatsoever 🙂
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I am not sure why SCSI controller and not RAID?
As I understand of tiered storage, it is to tier SSD with storage pool. Why can’t we assume that the storage pool where physical disks are pooled, are RAID based? as described in detail here
http://blogs.technet.com/b/askpfeplat/archive/2013/10/21/storage-spaces-how-to-configure-storage-tiers-with-windows-server-2012-r2.aspx
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“Storage Spaces has the following requirements:
Windows Server 2012 R2, Windows Server 2012, Windows 8.1, or Windows 8
Serial ATA (SATA) or Serial Attached SCSI (SAS) connected disks, optionally in a just-a-bunch-of-disks (JBOD) enclosure
RAID adapters, if used, must have all RAID functionality disabled and must not obscure any attached devices, including enclosure services provided by an attached JBOD.”
https://technet.microsoft.com/en-us/library/hh831739.aspx
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