824 Implementing the IBM Storwize V5000 Gen2 with IBM Spectrum Virtualize V8.1
Encryption of data at rest
Encryption of data at rest is the inactive encryption data that is stored physically on the
storage system.
Evaluation mode
The evaluation mode is an Easy Tier operating mode in which the host activity on all the
volume extents in a pool are “measured” only. No automatic extent migration is performed.
Event (error)
An event is an occurrence of significance to a task or system. Events can include the
completion or failure of an operation, user action, or a change in the state of a process.
Event code
An event code is a value that is used to identify an event condition to a user. This value might
map to one or more event IDs or to values that are presented on the service panel. This value
is used to report error conditions to IBM and to provide an entry point into the service guide.
Event ID
An event ID is a value that is used to identify a unique error condition that was detected by the
Storwize V5000. An event ID is used internally in the cluster to identify the error.
Excluded condition
The excluded condition is a status condition. It describes an MDisk that the IBM Storwize
V5000 has decided is no longer sufficiently reliable to be managed by the cluster. The user
must issue a command to include the MDisk in the cluster-managed storage.
Extent
An extent is a fixed-size unit of data that is used to manage the mapping of data between
MDisks and volumes. The size of the extent can range 16 MB - 8 GB in size.
External storage
External storage refers to managed disks (MDisks) that are SCSI logical units that are
presented by storage systems that are attached to and managed by the clustered system.
Failback
Failback is the restoration of an appliance to its initial configuration after the detection and
repair of a failed network or component.
Failover
Failover is an automatic operation that switches to a redundant or standby system or node in
a software, hardware, or network interruption. See also Failback.
Feature activation code
An alphanumeric code that activates a licensed function on a product.
Fibre Channel port logins
Fibre Channel (FC) port logins refer to the number of hosts that can see any one Storwize
V5000 port. The IBM Storwize V5000 has a maximum limit per node port of FC logins that are
allowed.
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