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Term
Definition
Striping
Laying data out over a series of disks or virtual disks, allows multiple disk
controllers to simultaneously access data, thus improving performance.
Stripe size
Total amount of data in a disk stripe, that is, the block size multiplied by number
of data disks in the stripe.
Stripe width
Total number of disks in a disk stripe.
Sun StorageTek
Storage Pool Manager
software
Uses virtualization capabilities of the Sun StorageTek 9990V system to simplify
storage management, using storage pools and application-oriented storage
profiles.
Switch
The name of an implementation of the fabric topology. A fabric element that
implements a fabric. The fabric element that allows each port of a switch to be
connected to any other port on that switch. A collection of switches implement
a fabric and provide the network through which any device can communicate
with any other device.
Symmetric volume
access
A storage access method that provides multiple live data paths to the same
volume.
Syslog
The internal log file maintained by Sun StorageTek 9990V arrays to track
events and alerts as well as informational and notice messages. This log file can
be sent periodically to a host server for evaluation using the
syslogd(1M)
function.
System management
The set of features and functions that allow the user to control a storage system.
Target
The recipient of initiator commands. For example, volumes are presented to
initiators as targets.
Telemetry stream
Stream of data generated by monitoring agents.
Throughput
A measure of sequential I/O performance, quoted as gigabytes per second
(GB/sec.). See IOPS and I/O rate.
Topology
The components used to connect two or more ports together. Also, a specific
way of connecting those components, as in point-to-point, fabric, or arbitrated
loop.
Transfer rate
The rate at which data is transferred, usually measured in megabytes per second
(MB/sec.).
Tray
An enclosure containing disks.
Tray depopulation
Trays delivered without the full compliment of disks installed. Allows
additional disks to be added to trays that are not fully populated.
Virtual disk
Any abstraction or collection of disks that appears as a single disk to the device
mounting it.
Volume
A logical disk carved from a storage pool. A virtual disk comprised of raw
storage extents into which a file system, a DBMS, or an application can place
data. Can be a single physical disk or a virtual disk mapped from one or more
underlying extents.
Warm boot device
Bootable on all supported HBAs with storage booted before server booting.
Zone or zoning
Provided by fabric switches, a function that allows segmentation of node by
physical port, name, or address.
Just the Facts
October 2007
182
Sun Confidential – For Internal Use and Authorized Partner Use Only
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