Storage Devices Quiz
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12 Terms
What unit is used to measure the spinning speed of magnetic HDD platters?
Revolutions per minute (RPM).
What is the maximum RPM commonly available in modern HDDs?
15,000 RPM.
What HDD form factor is commonly used in laptops?
2.5-inch.
What HDD form factor is commonly used in desktop computers?
3.5-inch.
What older portable SSD form factor was replaced by M.2?
mSATA.
Which are standard SSD form factors?
M.2 and mSATA.
What is RAID 0?
RAID 0 uses disk striping, requires at least 2 drives, has no fault tolerance, and prioritizes performance.
What is RAID 1?
RAID 1 uses disk mirroring, requires at least 2 drives, and duplicates data for fault tolerance.
What is RAID 10?
RAID 10 combines mirroring and striping, requires at least 4 drives, and provides high performance plus fault tolerance.
Which RAID level provides no fault tolerance?
RAID 0 — if one drive fails, all data in the array is lost.
With the minimum number of drives, which RAID levels provide the most usable storage?
RAID 0 and RAID 5.
Which RAID level provides the best performance?
RAID 0 — striping across multiple drives provides the highest performance.