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Chapter 6, Problem 3TC

a.

Explanation of Solution

Given:

PATA hard drive

SATA hard drive

To find:Whether PATA hard drives are older and slower than SATA hard drives.

Solution:

Yes, SATA hard drives are successor to the PATA hard drives...

b.

Explanation of Solution

Given:

SATA 1

SATA 3

To find:Whether SATA 1 is 10 times faster than SATA 3...

c.

Explanation of Solution

Given:RAID 0.

To find:Whether RAID 0 can be implemented by using only single hard drive.

Solution:

No...

d.

Explanation of Solution

Given:RAID 5.

To find:Whether RAID 5 requires five hard drives which work together at the same speed and capacity...

e.

Explanation of Solution

Given:

Internal SATA data cable

eSATA port

To find:Whether an internal SATA data cable can be used with an eSATA port...

f.

Explanation of Solution

Given:Internal SATA data cable

To find:Whether an internal SATA data cable has 7 pins.

Solution:

Yes, SATA cable has 7 pins...

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What is the average time to read or write a 512-byte sector for a typical disk rotating at 45,000 RPM? The advertised average seek time is 2 ms, the transfer rate is 400 MB/sec, and the controller overhead is 0.2 ms. Assume that the disk is idle so that there is no waiting time.
The disk specification in Figure 7.15 gives a data transfer rate of 60MB per second when reading from the disk, and 320MB per second when writing to the disk. Why are these numbers different? (Hint: Think about buffering.)
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