HP StorageWorks MSA1000 User Manual

Installation Procedures - for all MSA1000 Deployments
19MSA1000 Installation Guide
Striping Methods
A storage array combines the capacity of several physical hard drives into one
virtual unit called a logical unit (LUN). These LUNs are presented to the
operating system as a disk device. The physical layout of an array can be one of
two configurations:
■ Vertical striping
■ Horizontal striping
In a vertical configuration, an array uses physical drives from each storage
enclosure. In a horizontal configuration, the array uses multiple drives contained
within the same storage enclosure.
Vertical and horizontal arrays each have their advantages and disadvantages.
Vertical arrays offer ultimate fault tolerance, but at the price of capacity utilization
and performance, while horizontal arrays allow for the creation of large arrays and
offer the best combination of capacity utilization and performance.
RAID Types
RAID is an acronym for Redundant Array of Inexpensive Disks. RAID
configurations allow you to combine multiple physical drives from one or more
storage enclosures into a single logical unit. RAID configurations can provide
fault-tolerance capabilities, so that one or more drives within the RAID set can
fail without bringing the drive sub-system down.
RAID configuration options provide flexibility to configure logical units in a way
that fits your need for availability, speed, and capacity.
RAID levels include:
■ RAID 0 — data striping only (no fault tolerance)
■ RAID 1 — drive mirroring
■ RAID 1+0 — data striping and drive mirroring
■ RAID 5 — distributed data guarding, with distributed parity data
■ RAID ADG — Advanced Data Guarding, with two sets of distributed parity
The RAID level you choose affects the amount of available storage capacity, and
the performance and availability of your array.
For example, if you require a fault-tolerant system for critical data, use either
RAID 1 (or RAID 1+0), RAID 5, or RAID ADG. RAID 1 (or RAID 1+0) is the
best choice for fault tolerance when I/O performance is also important. RAID 5 or
RAID ADG is the best choice when capacity utilization is also important.

HP StorageWorks MSA1000 Specifications

General

RAID levels	0, 1, 0+1, 5
Certification	Microsoft Cluster Server Certification\\r Hewlett Packard Data Protector\\r VERITAS Backup Exec and NetBackup\\r Legato NetWorker for Windows\\r Computer Associates BrightStor Enterprise Backup
Internal memory	256 MB
Memory clock speed	- MHz
Internal memory type	-
Operating temperature (T-T)	10 - 35 °C
Operating relative humidity (H-H)	10 - 90 %
Supported storage drive interfaces	SCSI
Windows operating systems supported	Yes
Harmonized System (HS) code	84733080

Weight and Dimensions

Depth	52.1 mm
Width	48.3 mm
Height	17.5 mm
Weight	31210 g