HP ProLiant ML350 G5 User Manual

Arr ay s
See Figure 9. With an a rray controller installed in the system, the capacity of several physical drives
(P1–P3) can be logically combined into one or more logical units (L1) called arrays. When this is
done, the read/write heads of all the constituent physical drives are active simultaneously, dramatically
reducing the ov
erall time required for data transfer.
NOTE:
Depending on the storage server model, array con figuration may not be possible or necessary.
P1 P3P2
L1
gl0042
Figure 9 Con figuring arrays from physical drives
Because the read/write heads are simultaneously active, the same amount of data is written to each
drive during any given time interval. Each unit of data is termed a block. The blocks form a set of data
stripes over all the hard drives in an array, as shown in Figure 10.
S1
S2
S3
S4
B1
B4
B7
B2
B5
B8
B11B10 B12
B6
B3
B9
gl0043
Figure 10 RAID 0 (data striping) (S1-S4 ) of data blocks (B1-B12)
For data in the array to be readable, the data block sequence within each stripe must be the same.
This sequencing process is performed by the array controller, which sends the data blocks to the drive
write h ea ds in the correct order.
A natural consequence of the striping process is that each hard drive in a given array contains the
same number of data blocks.
NOTE:
If one hard drive has a larger capacity than other hard drives in the same array, the extra capacity is
wastedbecauseitcannotbeusedbythearray.
Fault tolerance
Drive failure, although rare, is potentially catastrophic. For example, using simple striping as shown in
Figure 10, failure of a ny hard drive leads to failure of all logical d rives in the same array, and hence to
data loss.
To protect against data loss from hard drive failure, storage servers should be configured with fault
tolerance. HP recommends adhering to RAID 5 configurations.
HPProLiantML350G5StorageServer
37

HP ProLiant ML350 G5 Specifications

General

Product Type	Network Storage Server
Form Factor	Tower
Processor Sockets	2
Chipset	Intel 5000P
Maximum Memory	32 GB
Hard Drive Interface	SAS/SATA
Maximum Internal Storage	4.5 TB
Network Interface	Gigabit Ethernet
Processor	Intel Xeon
Memory Type	DDR2 FB-DIMM
Network Controller	NC373i Multifunction Gigabit Network Adapter
Power Supply	Hot-plug, redundant power supply
Expansion Slots	6
Operating System Support	Windows Server, Linux, VMware

Summary

About This Guide

Intended Audience

Defines the target readers of the manual, focusing on technical professionals.

Related Documentation

Lists other HP ProLiant Storage Server and Server documentation.

Document Conventions and Symbols

Explains formatting, symbols, and text conventions used in the document for clarity.

Chapter 1: The HP Storage Server Solution

Server Identification

Explains how to identify ProLiant Storage Server models based on prefixes and generation.

Storage Environment Technologies

Introduces SAN and NAS concepts, and Fibre Channel and Serial ATA technologies.

Tiered Storage Environments

Describes matching data to storage tiers for cost optimization and performance.

Chapter 4: Storage Management Overview

Storage Management Elements

Divides storage into physical, logical, file system, and file sharing elements.

Physical Storage Elements

Discusses management at the physical drive level, including disk carving strategies.

Chapter 5: File Server Management

New or Improved File Services Features in Windows Storage Server 2003 R2

Highlights DFS Namespaces, DFS Replication, and other enhancements.

File Server Resource Manager (FSRM)

Tools for managing data quantity, type, quotas, file screening, and reports.

HP Storage Server Management Console

User interface for managing file and print services, DFS, and disk utilities.

Chapter 6: Print Services

Microsoft Print Management Console

MMC snap-in for enterprise print management tasks, supporting various Windows versions.

New or Improved HP Print Server Features

Details new HP utilities like Web Jetadmin, INPW, DLM, and Print Migrator.

User-mode vs. Kernel-mode Drivers

Explains driver types and how to check installed driver mode for stability.

Chapter 7: Other Network File and Print Services

Microsoft Services for Network File System (MSNFS)

Update to NFS components, offering new administration features and improved UNIX support.

UNIX Identity Management

Simplifies network administration and account management across Windows and UNIX environments.

File and Print Services for NetWare (FPNW)

Integrates storage server into NetWare environments, providing NetWare UI and share management.

AppleTalk and File Services for Macintosh

Enables file and printer sharing between servers and Macintosh clients using AppleTalk.

Chapter 8: Troubleshooting, Servicing, and Maintenance

Troubleshooting the Storage Server

Guide to resolving problems using HP Support & Drivers, manuals, and release notes.

Maintenance and Service Documentation

Information on server maintenance, customer self-repair, firmware updates, and COA.

Chapter 9: System Installation and Recovery

The Installation and Recovery DVD

Describes the DVD for initial OS installation and recovery from failures.

Restoring a Factory Image

Step-by-step guide to restore the server to its original factory configuration.

Managing Disks After Restoration

Addresses potential issues with drive letter assignments after system restoration.

Appendix A: Network Adapter Teaming

HP Network Configuration Utility

Utility for configuring and monitoring Ethernet NIC teams for fault tolerance and throughput.

Adding and Configuring NICs in a Team

Steps to team NICs, including prerequisites and important considerations.

Team Properties Page and Types

Manages team settings, types (Automatic, 802.3ad, TLB, NFT), and load balancing methods.

Appendix B: Regulatory Compliance and Safety

Federal Communications Commission (FCC) Notice

Details FCC rules for RF emission limits, Class A and B equipment, and declaration of conformity.

Laser Compliance

Information on Class 1 laser product classification and safety precautions for optical devices.

International Notices and Statements

Compliance statements for Canada, Europe (EU, BSMI), Japan, and Korea.

Safety Precautions

Covers battery replacement, electrostatic discharge, grounding methods, and handling precautions.