A system is having disk performance issues, and the administrator wants to upgrade the storage system. Which of the following would provide the fastest and MOST reliable storage?

Question

Options

• ASSD with SAS
• BSSD with SATA
• CMagnetic with SAS
• DMagnetic with SATA

• A
  91% (21)
• B
  4% (1)
• D
  4% (1)

Explanation

Storage performance is determined by two factors: the drive technology and the host interface. SSDs (Solid State Drives) use NAND flash memory with no moving parts, delivering dramatically lower latency, higher IOPS, and better reliability (lower MTTR) compared to magnetic HDDs. SAS (Serial Attached SCSI) is an enterprise-grade interface that offers higher throughput (up to 24 Gb/s on SAS-3), redundant port paths for fault tolerance, and better error handling than SATA, which is a consumer/prosumer interface with lower performance and no native multi-path support. Combining SSD technology with a SAS interface (Answer A) provides the highest speed and the most reliable configuration. SSD with SATA (B) is fast but less reliable and lower throughput. Magnetic with SAS (C) is reliable but slow. Magnetic with SATA (D) is the slowest and least reliable combination.

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