Gateway FX510XT 8512066 - Gateway Reference Guide (for FX510 computers with Wi - Page 36

How it makes file storage cheaper, Drawbacks

Page 36 highlights

CHAPTER 3: Setting Up and Getting Started How it increases performance The more drives you have in your RAID 0 array, the faster the potential drive reading performance. All hard drives have limitations on how fast they can read and write files. If half a file is stored on one RAID 0 drive and the other half on another RAID 0 drive, each drive only has to read half of the file. So, the entire file is accessed by the computer up to twice as fast (using a two-drive RAID 0 array). In a three-drive RAID 0 array, if the file is evenly distributed among the drives, each drive must read only a third of the file, and so on. If the entire file happens to be stored on only one of the drives, the file is accessed at the same speed as if it were on a standard hard drive setup. Dividing up files between multiple hard drives like this is called striping. RAID 0 A B C D E F How it makes file storage cheaper Because RAID 0 lets your computer see multiple hard drives as a single drive, you can install several lower capacity (less expensive) drives and have the same single-drive storage simplicity and capacity as a larger, more expensive hard drive. Drawbacks Unfortunately, RAID 0 lets multiple drives behave as one in another way. If part of the array fails (such as a hard drive crashing), the entire array fails. Because the drives are treated like a single drive, parts of files (including operating system files) can be spread across several drives, leaving the computer with only file fragments if one drive fails. Regular and frequent backups are critical. Another drawback is that RAID 0 treats each hard drive as if it has the storage capacity of the smallest drive in the array. So if you have three drives (300 GB, 250 GB, and 200 GB) in a RAID 0 array, your computer only recognizes 600 GB total capacity. 30

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
  • 127
  • 128
  • 129
  • 130
  • 131
  • 132
  • 133
  • 134
  • 135
  • 136
  • 137
  • 138
  • 139
  • 140
  • 141
  • 142
  • 143
  • 144
  • 145
  • 146
  • 147
  • 148
  • 149
  • 150

CHAPTER
3
: Setting Up and Getting Started
30
How it increases performance
The more drives you have in your RAID 0 array, the faster the
potential drive reading performance. All hard drives have
limitations on how fast they can read and write files. If half
a file is stored on one RAID 0 drive and the other half on
another RAID 0 drive, each drive only has to read half of the
file. So, the entire file is accessed by the computer up to twice
as fast (using a two-drive RAID 0 array). In a three-drive RAID
0 array, if the file is evenly distributed among the drives, each
drive must read only a third of the file, and so on. If the entire
file happens to be stored on only one of the drives, the file
is accessed at the same speed as if it were on a standard hard
drive setup. Dividing up files between multiple hard drives like
this is called
striping
.
How it makes file storage cheaper
Because RAID 0 lets your computer see multiple hard drives
as a single drive, you can install several lower capacity (less
expensive) drives and have the same single-drive storage
simplicity and capacity as a larger, more expensive hard drive.
Drawbacks
Unfortunately, RAID 0 lets multiple drives behave as one in
another way. If part of the array fails (such as a hard drive
crashing), the entire array fails. Because the drives are treated
like a single drive, parts of files (including operating system
files) can be spread across several drives, leaving the
computer with only file fragments if one drive fails. Regular
and frequent backups are critical.
Another drawback is that RAID 0 treats each hard drive as if
it has the storage capacity of the smallest drive in the array.
So if you have three drives (300 GB, 250 GB, and 200 GB) in
a RAID 0 array, your computer only recognizes 600 GB total
capacity.
A
C
E
B
D
F
RAID 0