3.3 Given a scenario, select and install storage devices.

Question 1

Hard Disk Drives

Answer 1

Non-volatile magnetic storage - rapidly rotating platters. Random-access– Retrieve data from any part of the drive at any time
Moving parts– Spinning platters, moving actuator arm– Mechanical components limit the access speed– Mechanical components can also break

Question 2

Speeds for Hard Disk Drive

Answer 2

If rotational speed for disk is 15,000 then average rotational latency is 2ms. If rotational speed is 10,000 rpm then average rotational latency is 3ms. If rotational speed is 7200 then average rotational latency os 4.16 ms. If rotational speed is 5400 rpm then average rotational latency is 5.55ms.

Question 3

Form factor

Answer 3

2.5 & 3.5 sized hard drives are newer systems. M.2 drives.

Question 4

SSD (Solid State Drive).

Answer 4

Non-volatile memory - No moving parts
Very fast performance - No spinning drive delays.

Question 5

mSATA (Mini-SATA)

Answer 5

Shrink the SATA drive into smaller devices– Same data, different form factor– Great for laptops and mobile devices.Smaller than 2.5” SATA drives– No spinning drive– Allows for different form factors.

Question 6

NVME (Non- violatile memory express)

Answer 6

Designed for SSD speeds– Lower latency, supports higher throughputs– Take advantage of NVMe with an M.2 interface

Question 7

M.2 interface

Answer 7

Smaller form factor - No SATA data or power cables. Can use a PCI Express bus connection– 4 GB/second throughput or faster when using NVMe PCIe x4
Different connector types– Needs to be compatible with the slot key/spacer– B key, M key, or B and M key– Some M.2 drives will support both

Question 8

Installing M.2

Answer 8

See slide

Question 9

Flash drives

Answer 9

Flash memory– EEPROM (Electrically erasable programmable
read-only memory)– Non-volatile memory - No power required to retain data
Limited number of writes– Can still read the data.Not designed for archival storage– Easy to lose or damage - Always have a backup – Flash memory.

Question 10

Optical drives

Answer 10

Small bumps read with a laser beam– Microscopic binary storage.Relatively slow– Archival media.Many different formats - CD-ROM, DVD-ROM, Blu-ray.Internal and external drives– For those uncommon application installations.