HP P2000 HP P2000 G3 MSA System SMU Reference Guide - Page 153

SCSI Enclosure Services., secret, single-port disk, snap pool, snapshot, unwritable cache data, vdisk - lost password

Get HP P2000 PDF manuals and user guides View all HP P2000 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 153 highlights

secret For use with CHAP, a password that is shared between an initiator and a target to enable authentication. SES SCSI Enclosure Services. single-port disk A disk that is connected to both controllers so its data path is not fault-tolerant. A single-port disk's type is shown as SAS-S or SATA-S. snap pool A volume that stores data that is specific to snapshots of an associated master volume, including copy-on-write data and data written explicitly to the snapshots. A snap pool cannot be mapped. snapshot A "virtual" volume that preserves the state of a master volume's data as it existed when the snapshot was created. Data associated with a snapshot is recorded in both the master volume and in its associated snap pool. A snapshot can be mapped and written to. The capability to create snapshots is a licensed feature. Snapshots that can be mapped to hosts are counted against the snapshot-license limit, whereas transient and unmappable snapshots are not. ULP Unified LUN Presentation. A RAID controller feature that enables a host to access mapped volumes through any controller host port. ULP incorporates Asymmetric Logical Unit Access (ALUA) extensions. unwritable cache data Cache data that has not been written to disk and is associated with a volume that no longer exists or whose disks are not online. If the data is needed, the volume's disks must be brought online. If the data is not needed it can be cleared, in which case it will be lost and data will differ between the host and disk. Unwritable cache is also called orphan data. vdisk A "virtual" disk comprising the capacity of one or more disks. The number of disks that a vdisk can contain is determined by its RAID level. volume A portion of the capacity of a vdisk that can be presented as a storage device to a host. volume copy An independent copy (clone) of the data in a volume. The capability to create volume copies makes use of snapshot functionality. WWN World Wide Name. A globally unique 64-bit number that identifies a node process or node port. WWNN World Wide Node Name. A globally unique 64-bit number that identifies a node process. WWPN World Wide Port Name. A globally unique 64-bit number that identifies a node port. HP P2000 G3 MSA System SMU Reference Guide 153

  • 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
  • 156
  • 157
  • 158
  • 159
  • 160
HP P2000 G3 MSA System SMU Reference Guide
153
secret
For use with CHAP, a password that is shared between an initiator and a target to enable
authentication.
SES
SCSI Enclosure Services.
single-port disk
A disk that is connected to both controllers so its data path is not fault-tolerant. A single-port
disk’s type is shown as SAS-S or SATA-S.
snap pool
A volume that stores data that is specific to snapshots of an associated master volume,
including copy-on-write data and data written explicitly to the snapshots. A snap pool
cannot be mapped.
snapshot
A “virtual” volume that preserves the state of a master volume’s data as it existed when the
snapshot was created. Data associated with a snapshot is recorded in both the master
volume and in its associated snap pool. A snapshot can be mapped and written to. The
capability to create snapshots is a licensed feature. Snapshots that can be mapped to hosts
are counted against the snapshot-license limit, whereas transient and unmappable
snapshots are not.
ULP
Unified LUN Presentation. A RAID controller feature that enables a host to access mapped
volumes through any controller host port. ULP incorporates Asymmetric Logical Unit Access
(ALUA) extensions.
unwritable cache data
Cache data that has not been written to disk and is associated with a volume that no longer
exists or whose disks are not online. If the data is needed, the volume’s disks must be
brought online. If the data is not needed it can be cleared, in which case it will be lost and
data will differ between the host and disk. Unwritable cache is also called orphan data.
vdisk
A “virtual” disk comprising the capacity of one or more disks. The number of disks that a
vdisk can contain is determined by its RAID level.
volume
A portion of the capacity of a vdisk that can be presented as a storage device to a host.
volume copy
An independent copy (clone) of the data in a volume. The capability to create volume
copies makes use of snapshot functionality.
WWN
World Wide Name. A globally unique 64-bit number that identifies a node process or
node port.
WWNN
World Wide Node Name. A globally unique 64-bit number that identifies a node process.
WWPN
World Wide Port Name. A globally unique 64-bit number that identifies a node port.