Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

CISA-2110 Server Hardware > Chapter 11: Drives > Flashcards

Chapter 11: Drives Flashcards

(65 cards)

Start Studying
1
Q

Write through writes information to the disk before what?

A

The OS is notified that the write was successful

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

SAS uses what legacy storage protocol?

A

SCSI

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

In NAS technology, what keeps track of where files are located?

A

The NAS device’s operating system

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

In the Fibre Channel model what is layer 0?

A

Physical

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

The sixth step in a disk array controller operation is?

A

Head reads servo track and waits for data to rotate underneath the head.

Servo track allows accurate tracking

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

For a 15,000rpm drive, how long is the rotational latency?

A

2ms

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Linear movement of the head is called?

A

Seek

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

The third step in a disk array controller operation is?

A

Disk array controller executes I/O commands

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Platter assembly mounted on a _______ that revolves around an axis

A

spindle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

iSCSI allows SCSI access over what?

A

TCP/IP

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

SCSI is limited to how many drives?

A

14

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What feature found in SCSI improves data integrity?

A

Cyclic redundancy checking

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Seek time is the time to get what?

A

A Track

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

As a rule of thumb, doubling the number of drives will increase your throughput by how much?

A

50%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

The platters in hard disk drives are coated with what?

A

Magnetic Material

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

The second step in a disk array controller operation is?

A

OS generates an interrupt

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

The tenth step in a disk array controller operation is?

A

Controller communicates a completion to the device driver

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

In NAS technology, what issues disk I/O requests?

A

The NAS device’s operating system

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

The time required for the disk to transfer requested data is called what?

A

Transfer Rate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

SAS usually has how many lanes?

A

4

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

EIDE cables are typically what length?

A

18 inches

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

On a consumer grade disk, the seek operation usually takes how long?

A

7-10ms

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

LBA stands for what?

A

Logical Block Address

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

iSCSI uses what medium?

A

Gigabit Ethernet

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
PATA operates at what voltage?
5v
19
The ninth step in a disk array controller operation is?
PCI data is transferred into the server main memory
20
If data is stored on 10% of the disk surface then the disk has how much stroke?
10%
21
The first step in a disk array controller operation is?
Logical Block Address (LBA) is given for a read command by the OS
22
Drive failure puts system in what state?
Critical
23
In the Fibre Channel model what is layer 2?
Signaling and Framing
24
What are the two disk cache modes?
Write through and Write Back
26
The eighth step in a disk array controller operation is?
Controller initiates a DMA operation
27
The maximum distance of a fibre channel link is?
10Km
29
In terms of Hard Disk Drives, Latency is what?
The time for data to move under the head
30
In NAS technology, all I/O operations use what?
File-level protocols
30
How do RAID controller hold data in cache in the case of a power failure for years?
A battery
30
In the Fibre Channel model what is layer 4?
Mapping
31
Disk Fragmentation occurs when files are not?
Contiguous
33
SATA operates at what voltage?
250mv
35
In the context of SATA 3, what is the purpose of the Backplane?
Interconnects of hot-swap racks
37
On a high end disk, the seek operation usually takes how long?
3-5ms
38
The fundamental disk subsystem has two components
The Hard Disk & The Controller
39
The Active Data set size is measured by what?
Disk Stroke
40
The seventh step in a disk array controller operation is?
Read data is transferred to a buffer from the read head
42
The two types of disk connectivity are?
Parallel & Serial
42
The TRIM function is triggered when?
Emptying the Recycle Bin or Formatting the Drive
44
For a 10,000rpm drive, how long is the rotational latency?
3ms
45
Both EIDE and SCSI use what type of connectivity?
Parallel
46
SAS supports up to what speed per lane?
3Gbps each way
47
SATA 3 provides speed up to?
600Mbps
48
For a 7,200rpm drive, how long is the rotational latency?
4ms
49
The fourth step in a disk array controller operation is?
Command sent to target drive
50
what is layer 1?
In the Fibre Channel model
52
The most important advantage of SAS is?
Allows simultaneous processing of multiple I/O requests
54
What three devices does a NAS consist of?
A server, Operating System, and Storage
55
The fifth step in a disk array controller operation is?
Target drive processes command by moving head to the track where the data resides
56
In the Fibre Channel model what is layer 3?
Common Services
58
At a minimum there needs to be two wires for serial, what are they for?
One for sending and one for receiving
59
The main problem with increasing Parallel bus speed is?
Increase in electromagnetic radiation or noise
60
The OS "sees" SATA devices the same as?
PATA Remove Storage
61
In the Fibre Channel model what is layer 1?
Transmission
62
Storage Area Networks use what type of connections across the network?
Any-to-any
63
The maximum data payload for a Fibre Channel frame is?
2112 bytes
64
According to IBM, Fibre Channel has a max data rate of what?
4 GB/s
65
According to IBM, the Fibre Channel link to the server can be either one of three speeds?
1Gbps, 2Gbps, or 3Gbps

CISA-2110 Server Hardware (13 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions