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Glossary The glossary defines terms and acronyms used in MSA2000 Family storage system documentation. Definitions obtained from the Storage Networking Industry Association (SNIA) Dictionary are indicated with "(SNIA)" at the end. For the complete SNIA Dictionary, go to www.snia.org/education/dictionary. active-active address ANSI API array block broadcast write Synonym for dual active components or controllers. A pair of components, such as the controllers in a failure tolerant storage subsystem that share a task or class of tasks when both are functioning normally. When one of the components fails, the other takes on the entire task. Dual active controllers are connected to the same set of storage devices, improving both I/O performance and failure tolerance compared to a single controller. (SNIA) A data structure or logical convention used to identify a unique entity, such as a particular process or network device. American National Standards Institute. Application programming interface. See storage system. The unit in which data is stored to or retrieved from a disk. For MSA2000 Family storage systems a block is 512 bytes, equivalent to the size of a disk sector. Technology that provides simultaneous caching of write data to both RAID controllers' cache memory with positive direct memory access acknowledgement (certified direct memory access). 261

Section	Page
Contents	3
About This Guide	11
Intended Audience	11
Prerequisites	11
Document Conventions	12
HP Technical Support	13
Customer Self Repair	13
Product Warranties	13
Subscription Service	14
HP Websites	14
Documentation Feedback	14
1	15
Using the CLI	15
Accessing the CLI	15
Operation Modes	16
Using the XML API	19
DTD	20
Example	22
Command Syntax	25
Keywords and Parameters	25
Disk Drive Syntax	25
Virtual Disk Syntax	26
Volume Syntax	26
Host Nickname Syntax	27
Volume Mapping Syntax	27
Command Completion, Editing, and History	28
Viewing Command Help	29
Size of Devices and Logical Units	29
Event Log	30
2	31
Command Categories	31
CLI and Users	31
Virtual Disks and Disk Drives	32
Volumes and Mapping	32
Snapshots	33
Volume Copy (Clone)	33
Task Scheduling	33
Event Notification	34
Configuration and Utilities	34
Service Utilities	35
3	37
Command Descriptions	37
abort create	38
abort scrub	39
abort verify	40
abort volumecopy	41
alias	42
clear cache	44
clear disk-metadata	45
clear event	46
clear expander-status	47
convert master-to-std	48
convert std-to-master	49
create chap-record	50
create host-wwn-name	52
create iscsi-host	53
create master-volume	54
create schedule	56
create snap-pool	58
create snapshots	59
create task	60
create user	63
create vdisk	65
create volume	68
delete all-master-volumes	70
delete all-snapshots	71
delete chap-records	72
delete global-spare	73
delete host-wwn-name	74
delete iscsi-host	75
delete master-volume	76
delete schedule	77
delete snap-pool	78
delete snapshot	79
delete snapshot-write-data	80
delete task	81
delete user	82
delete vdisk	83
delete vdisk-spare	85
delete volume	86
exit	87
expand snap-pool	88
expand vdisk	90
expand volume	92
map volume	94
ping	97
rescan	98
reset host-channel-link	99
reset snapshot	100
restart	101
restore defaults	103
rollback master-volume	104
scrub vdisk	106
set auto-write-through-trigger	107
set awt	109
set cache-parameters	110
Cache Policy	110
Cache Optimization Mode	111
Read-Ahead Size	111
Independent Cache Performance Mode	112
set chap-record	116
set cli-parameters	118
set controller-date	120
set debug-log-parameters	122
set drive-parameters	124
set expander-fault-isolation	125
set expander-phy	127
set global-spare	129
set host-parameters	130
set host-port-interconnects	132
set host-wwn-name	133
set iscsi-host	134
set iscsi-parameters	135
set job-parameters	137
set led	138
set network-parameters	139
set password	141
set prompt	142
set protocols	143
set snap-pool-policy	145
set snap-pool-threshold	147
set snmp-parameters	149
set system	150
set user	151
set vdisk	153
set vdisk-spare	154
set volume	155
show auto-write-through-trigger	156
show cache-parameters	157
show channels	159
show chap-records	162
show cli-parameters	164
show configuration	166
show controller-date	168
show debug-log	169
show debug-log-parameters	172
show disks	174
show drive-parameters	177
show enclosure-status	178
show events	181
show expander-status	184
show frus	186
show host-maps	188
show host-parameters	190
show host-port-interconnects	193
show host-wwn-names	194
show iscsi-hosts	195
show iscsi-parameters	196
show job-parameters	198
show license	199
show master-volumes	200
show network-parameters	202
show ntp-status	204
show port-wwn	206
show protocols	207
show redundancy-mode	208
show schedule-details	210
show schedules	212
show sensor-status	213
show shutdown-status	215
show snap-pools	216
show snapshots	218
show snmp-parameters	220
show system	222
show task-details	223
show tasks	227
show users	228
show vdisks	230
show versions	232
show volumecopy-status	233
show volume-maps	235
show volumes	237
shutdown	240
stty	241
trust	242
unmap volume	244
verify vdisk	246
versions	247
volumecopy	248
4	251
Troubleshooting Using the CLI	251
Viewing Command Help	252
clear cache	252
clear expander-status	252
ping	253
rescan	253
reset host-channel-link	253
restart	253
restore defaults	254
set debug-log-parameters	254
set expander-fault-isolation	255
set expander-phy	255
set led	255
set protocols	256
show debug-log	256
show debug-log-parameters	256
show enclosure-status	257
show events	257
show expander-status	257
show frus	257
show protocols	258
show redundancy-mode	258
trust	258
Problems Scheduling Tasks	259
Create the Task	259
Reset Snapshot	259
Schedule the Task	259
Errors Associated with Scheduling Tasks	260
Missing Parameter Data Error	260
Glossary	261