HP StorageWorks SN6000 HP StorageWorks Simple SAN Connection Manager user guid - Page 140

Vraid0

Get HP StorageWorks SN6000 - Fibre Channel Switch PDF manuals and user guides View all HP StorageWorks SN6000 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 140 highlights

VDS Vraid0 Vraid1 Vraid5 Virtual Disk Service (VDS) is a set of application programming interfaces (APIs) that provides a single interface for managing disks. VDS provides an end-to-end solution for managing storage hardware and disks, and for creating volumes on those disks. A virtualization technique for EVA storage that provides no data protection. Data host is broken down into chunks and distributed on the disks comprising the disk group from which the virtual disk was created. Reading and writing to a Vraid0 virtual disk is very fast and makes the fullest use of the available storage, but there is no data protection (redundancy) unless there is parity. A virtualization technique for EVA storage that provides the highest level of data protection. All data blocks are mirrored or written twice on separate physical disks. For read requests, the block can be read from either disk, which can increase performance. Mirroring takes the most storage space because twice the storage capacity must be allocated for a given amount of data. A virtualization technique for EVA storage that uses parity striping to provide moderate data protection. Parity is a data protection mechanism for a striped virtual disk. A striped virtual disk is one where the data to and from the host is broken down into chunks and distributed on the physical disks comprising the disk group in which the virtual disk was created. If the striped virtual disk has parity, another chunk (a parity chunk) is calculated from the set of data chunks and written to the physical disks. If one of the data chunks becomes corrupted, the data can be reconstructed from the parity chunk and the remaining data chunks. 140

  • 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
140
VDS
Virtual Disk Service (VDS) is a set of application programming interfaces (APIs) that provides a
single interface for managing disks. VDS provides an end-to-end solution for managing storage
hardware and disks, and for creating volumes on those disks.
Vraid0
A virtualization technique for EVA storage that provides no data protection. Data host is broken
down into chunks and distributed on the disks comprising the disk group from which the virtual
disk was created. Reading and writing to a Vraid0 virtual disk is very fast and makes the fullest
use of the available storage, but there is no data protection (redundancy) unless there is parity.
Vraid1
A virtualization technique for EVA storage that provides the highest level of data protection. All
data blocks are mirrored or written twice on separate physical disks. For read requests, the
block can be read from either disk, which can increase performance. Mirroring takes the most
storage space because twice the storage capacity must be allocated for a given amount of
data.
Vraid5
A virtualization technique for EVA storage that uses parity striping to provide moderate data
protection. Parity is a data protection mechanism for a striped virtual disk. A striped virtual disk
is one where the data to and from the host is broken down into chunks and distributed on the
physical disks comprising the disk group in which the virtual disk was created. If the striped
virtual disk has parity, another chunk (a parity chunk) is calculated from the set of data chunks
and written to the physical disks. If one of the data chunks becomes corrupted, the data can be
reconstructed from the parity chunk and the remaining data chunks.