SK0-004 · Question #834
An administrator is preparing to carve the LUNs on the SAN and must select the appropriate type of disks for the database, OS, and archival data. The administrator must keep performance, redundancy…
The correct answer is A. SSD in RAID 10 for database, 10K SAS drives in RAID 1 for OS, 7.2K SATA drives in RAID 5. Selecting disk types and RAID levels on a SAN requires matching performance tier to workload - databases need the fastest storage with redundancy, the OS needs moderate performance, and archival data prioritizes cost over speed. Answer A correctly pairs each workload with the…
Question
An administrator is preparing to carve the LUNs on the SAN and must select the appropriate type of disks for the database, OS, and archival data. The administrator must keep performance, redundancy, and cost as a consideration. Which of the following is the administrator MOST likely to select?
Options
- ASSD in RAID 10 for database, 10K SAS drives in RAID 1 for OS, 7.2K SATA drives in RAID 5
- BSSD in RAID 10 for OS, 10K SAS drives in RAID 0 for database, 7.2K SATA drives in RAID 5
- CSSD in RAID 6 for archival data, 10K SAS drives in RAID 1 for database, 7.2K SATA drives in
- DSSD in RAID 10 for OS, 10K SAS drives in RAID 0 for archival data, 7.2K SATA drives in
How the community answered
(27 responses)- A63% (17)
- B22% (6)
- C11% (3)
- D4% (1)
Why each option
Selecting disk types and RAID levels on a SAN requires matching performance tier to workload - databases need the fastest storage with redundancy, the OS needs moderate performance, and archival data prioritizes cost over speed. Answer A correctly pairs each workload with the appropriate storage tier and RAID level.
SSDs in RAID 10 for the database provide maximum IOPS and redundancy with mirroring plus striping, which is essential for transactional database performance. 10K SAS drives in RAID 1 for the OS offer a cost-effective balance of speed and redundancy for operating system workloads that have moderate I/O demands. 7.2K SATA drives in RAID 5 for archival data minimize cost per GB while still providing parity-based redundancy appropriate for infrequently accessed data.
Using SSDs for the OS and 10K SAS in RAID 0 for the database is incorrect because RAID 0 provides no redundancy, making it unsuitable for a production database.
SSDs in RAID 6 for archival data wastes expensive SSD resources on low-access archival workloads where cost-effective SATA drives are appropriate.
Using SSDs for the OS is unnecessarily expensive when the OS workload does not require SSD-level IOPS, and RAID 0 for archival data provides no redundancy.
Concept tested: SAN LUN disk selection by workload type and RAID level
Source: https://learn.microsoft.com/en-us/windows-server/storage/storage-spaces/storage-spaces-direct-hardware-requirements
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