D-Link DSN-6210 User Manual - Page 19

iSCSI Concepts

Get D-Link DSN-6210 PDF manuals and user guides View all D-Link DSN-6210 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 19 highlights

D-Link Document - User Manual One RG (RAID group) consists of a set of VDs (Virtual Disk) and owns one RAID level attribute. Each RG can be divided into several VDs. The VDs in one RG share the same RAID level, but may have different volume capacity. All VDs share the CV (Cache Volume) to execute the data transaction. LUN (Logical Unit Number) is a unique identifier, in which users can access through SCSI commands. iSCSI Concepts iSCSI (Internet SCSI) is a protocol which encapsulates SCSI (Small Computer System Interface) commands and data in TCP/IP packets for linking storage devices with servers over common IP infrastructures. iSCSI provides high performance SANs over standard IP networks like LAN, WAN or the Internet. IP SANs are true SANs (Storage Area Networks) which allow several servers to attach to an infinite number of storage volumes by using iSCSI over TCP/IP networks. IP SANs can scale the storage capacity with any type and brand of storage system. In addition, it can be used by any type of network (Ethernet, Fast Ethernet, Gigabit Ethernet, and 10 Gigabit Ethernet) and combination of operating systems (Microsoft Windows, Linux, Solaris, Mac, etc.) within the SAN network. IP-SANs also include mechanisms for security, data replication, multi-path and high availability. Host 1 (initiator) NIC Host 2 (initiator) iSCSI HBA IP SAN iSCSI device 1 (target) iSCSI device 2 (target) Storage protocol, such as iSCSI, has "two ends" in the connection. These ends are initiator and target. In iSCSI, we call them iSCSI initiator and iSCSI target. The iSCSI initiator requests or initiates any iSCSI communication. It requests all SCSI operations like read or write. An initiator is usually located on the host side (either an iSCSI HBA or iSCSI SW initiator). Copyright@2014 D-Link System, Inc. All Rights Reserved. 19

  • 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
  • 151
  • 152
  • 153
  • 154
  • 155
D-Link Document – User Manual
One RG (RAID group) consists of a set of VDs (Virtual Disk) and owns one RAID level attribute. Each
RG can be divided into several VDs. The VDs in one RG share the same RAID level, but may have
different volume capacity. All VDs share the CV (Cache Volume) to execute the data transaction.
LUN (Logical Unit Number) is a unique identifier, in which users can access through SCSI
commands.
iSCSI Concepts
iSCSI (Internet SCSI) is a protocol which encapsulates SCSI (Small Computer System Interface)
commands and data in TCP/IP packets for linking storage devices with servers over common IP
infrastructures. iSCSI provides high performance SANs over standard IP networks like LAN, WAN or
the Internet.
IP SANs are true SANs (Storage Area Networks) which allow several servers to attach to an infinite
number of storage volumes by using iSCSI over TCP/IP networks. IP SANs can scale the storage
capacity with any type and brand of storage system. In addition, it can be used by any type of
network (Ethernet, Fast Ethernet, Gigabit Ethernet, and 10 Gigabit Ethernet) and combination of
operating systems (Microsoft Windows, Linux, Solaris, Mac, etc.) within the SAN network. IP-SANs
also include mechanisms for security, data replication, multi-path and high availability.
Storage protocol, such as iSCSI, has “two ends” in the connection. These ends are initiator and
target. In iSCSI, we call them iSCSI initiator and iSCSI target. The iSCSI initiator requests or initiates
any iSCSI communication. It requests all SCSI operations like read or write. An initiator is usually
located on the host side (either an iSCSI HBA or iSCSI SW initiator).
iSCSI device 1 (target)
Host 1
(initiator)
NIC
IP SAN
Host 2
(initiator)
iSCSI
HBA
iSCSI device 2 (target)
19
Copyright@2014 D-Link System, Inc. All Rights Reserved.