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Sean's personal study > Motherboard - Storage Devices > Flashcards

Motherboard - Storage Devices Flashcards

1
Q

What is the signaling rate of SATA I?

A

1.5 Gbps

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2
Q

What is the signaling rate of SATA II?

A

3 Gbps

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3
Q

What is the signaling rate of SATA III?

A

6 Gbps

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4
Q

What is the signaling rate of SATA 3.2 (SATA express)?

A

16 Gbps

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5
Q

What is the data transfer rate of SATA I?

A

150 MBps

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6
Q

What is the data transfer rate of SATA II?

A

300 MBps

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7
Q

What is the data transfer rate of SATA 3?

A

600 MBps

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8
Q

What is the data transfer rate of SATA 3.2 (SATA express)?

A

1.97 GBps

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9
Q

What is the data transfer rate for eSATA (external SATA)?

A

The most recently released version can do 600 MBps

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10
Q

What does mSATA stand for?

A

mini SATA (precursor to M.2) - looks like a larger version of M.2 and more square-shaped

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11
Q

What is eSATAp?

A

It is a powered eSATA port (often combined with a USB port) - without the extra power an external hard drive needs to have a secondary source of power. Either USB or eSATA can be plugged into eSATAp

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12
Q

What are characteristics of SATA?

A

Seven pins/seven copper conductors
4 pairs w/ differential signaling
Full duplex connection
Used to connect hard drives

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13
Q

What are common RPM’s for spinning disks?

A

5400 (very common), 7200 (also common), and 10,000 (very fast, used for servers, etc.)

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14
Q

What are typical maximum read/write speeds for disks at 5400 RPM, 7200 RPM, and 10,000 RPM?

A

5400 RPM - 200 MBps
7200 RPM - 400 MBps
10,000 RPM - 600 MBps

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15
Q

Do SSD disks require defragmentation?

A

No

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16
Q

What does HDD stand for?

A

Hard disk drive (also known as a spinning drive)

17
Q

Is data recovery easier for SSD’s or HDD’s?

A

Easier for HDD’s

18
Q

How did Sata Express or SATAe differ from previous versions of SATA?

A

Uses 2 PCIe lanes for increased data transfer rates

19
Q

What is eSATA?

A

External SATA - has a connector that looks like USB-C but rectangular

20
Q

What is areal density in HDD’s?

A

It is the density of bits on a surface. Higher density is faster speed. Newer HDD’s have increased density so they can be faster than older HDD’s even at the same RPM.

21
Q

What is the difference between sequential and random read/write?

A

Sequential is used in reading/writing a large file, random is a number of small files. Sequential is generally much faster than random.

22
Q

What are advantages of slower-spinning HDD’s vs. faster-spinning?

A

Lower energy consumption, quieter, longer life, low heat production

23
Q

What RPM is typically used for HDD’s in laptops and why?

A

Typically use 5400 because of the heat dissipation issues in laptops

Sean's personal study (4 decks)

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