HP LH4r Server Controllers and Mass Storage Devices

HP LH4r - NetServer - 256 MB RAM Manual

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  • HP LH4r | Server Controllers and Mass Storage Devices - Page 1
    reviews many of the storage solutions that are available for HP NetServers including hard disk drive products, Small Computer System Interface (SCSI) and disk array controllers, tape backup solutions, and the range of supported RAID solutions. The paper also examines the newest offerings including
  • HP LH4r | Server Controllers and Mass Storage Devices - Page 2
    evaluate server system choices, will meet your needs now and in the future. If you have additional questions on related topics, there are many HP NetServer white papers and technology briefs that may be of interest to you as well. A detailed listing of these references and their URLs are included
  • HP LH4r | Server Controllers and Mass Storage Devices - Page 3
    , eventually up to 10 kilometers, allowing for mirrored configurations that enhance disaster tolerant scenarios. The server systems will be more scaleable. SCSI supports a maximum of 15 disks per channel while up to 126 disks can be attached to a single Fibre Channel arbitrated loop. Fibre Channel
  • HP LH4r | Server Controllers and Mass Storage Devices - Page 4
    into an external storage unit Examples of each of these forms include: • Embedded − SCSI I/O chips − Embedded RAID in the HP NetServer LH 3 and LH 4 using SCSI I/O chips and a microprocessor • Adapter Cards − HP NetRAID which adapts (or bridges) between PCI and SCSI and also provides RAID
  • HP LH4r | Server Controllers and Mass Storage Devices - Page 5
    a certain level of internal storage, usually selected as functions of user needs and costs. For example, a high-end server system might support a dozen internal hot-swap disk drives whereas an entry-level system might have only a couple of fixed internal drives. External storage can be rack-mounted
  • HP LH4r | Server Controllers and Mass Storage Devices - Page 6
    ZKLWHýSDSHU +3ý 1HW6HUYHUý $FFHVVRULHV Backup System backup is an essential component of any mass storage strategy. Backup strategies provide for the reconstruction and recovery of lost operating environments and application data if the system should fail. They complement other availability
  • HP LH4r | Server Controllers and Mass Storage Devices - Page 7
    not protect from accidental or malicious destruction, theft, or site-wide problems like flood or fire. What kind of data protection is appropriate? Is or profitability, or to the productivity of the employees? HP NetServer Solutions Hewlett-Packard has been supplying system solutions for demanding
  • HP LH4r | Server Controllers and Mass Storage Devices - Page 8
    HP NetServer hardware and software, and to bring them to market in cost-effective and timely ways. As an example, HP offers proactive warranty replacement on drives, meaning that the company will replace them for you if HP server management software indicates a problem programmed to support a hot
  • HP LH4r | Server Controllers and Mass Storage Devices - Page 9
    The I2O specification has been developed to address two key problem areas in I/O processing: • System performance degradation caused by support for I2O in early 1998. Hewlett-Packard has launched the HP NetRAID-3Si disk array controller, the first in a line of HP NetServer products that will support
  • HP LH4r | Server Controllers and Mass Storage Devices - Page 10
    are used to build redundancy into configurations. Fibre Channel switches support a third topology, fabric, and are becoming widely available to treat storage as a utility that is shared between servers. Backup Solutions HP offers a full range of hardware and software products used to back up data
  • HP LH4r | Server Controllers and Mass Storage Devices - Page 11
    HP NetServer disk subsystems are completely integrated with Hewlett-Packard server management software, allowing you to monitor and manage disks on local and remote servers. For example, if you have installed HP of probable disk problem(s) HP SureStore tape backup devices support the "TapeAlert"
  • HP LH4r | Server Controllers and Mass Storage Devices - Page 12
    FFHVVRULHV For More Information For additional information about single server and multi-server high availability see several papers at: http://www.hp.com/netserver/products/cluster/more.htm For additional information about data protection schemes, see the RAID Levels Technology Brief at: http://www
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Executive Summary
Description
The proper selection of controller and storage devices, as part of either a
single server or clustered system, enhances the system’s performance and
availability. Storage capacity, data transfer rates and response times to user
requests depend upon the types of controller and storage devices. These
devices significantly impact traditional measurements of system performance.
Availability depends upon the architecture of storage within a server system
so that the data and applications can be both protected and available at a
level consistent with the criticality of the server environment.
Storage management concerns the tools used to monitor and predict the
storage environment. The proper tools can make storage management
intuitive and informative, ultimately reducing total cost of ownership. These
management tools, combined with the correct controllers and disks, can
accommodate eventual system growth in both user base and application
complexity.
Topics Covered
You should read this white paper to become better acquainted with the
important issues related to selecting controller and mass storage devices
including
•
Choices between various devices, such as controllers, tape backup
drives, and disk drives
•
Physical means of storage organization, i.e. internal, external,
rack-mountable
•
Storage topology to improve system availability and performance
•
Storage management
This paper reviews many of the storage solutions that are available for
HP NetServers including hard disk drive products, Small Computer System
Interface (SCSI) and disk array controllers, tape backup solutions, and the
range of supported RAID solutions. The paper also examines the newest
offerings including I
2
O, Fibre Channel (FC), and Ultra2 SCSI where HP has
provided industry-wide leadership in the development and acceptance of
these standards.