Seagate ST34572WC Especificaciones descargar pdf (Pagina 3)

Abstract

This white paper discusses how to deal with disk failures under the HP-UX Logical Volume Manager

(LVM). It is intended for system administrators or operators who have experience with LVM. It includes

strategies to prepare for disk failure, ways to recognize that a disk has failed, and steps to remove or

replace a failed disk.

Background

Whether managing a workstation or server, your goals include minimizing system downtime and

maximizing data availability. Hardware problems such as disk failures can disrupt those goals.

Replacing disks can be a daunting task, given the variety of hardware features such as hot-swappable

disks, and software features such as mirroring or online disk replacement you can encounter.

LVM provides features to let you maximize data availability and improve system uptime. This paper

explains how you can use LVM to minimize the impact of disk failures to your system and your data. It

also addresses the following topics:

 Preparing for Disk Recovery: what you can do before a disk goes bad. This includes guidelines on

logical volume and volume group organization, software features to install, and other best

practices.

 Recognizing a Failing Disk: how you can tell that a disk is having problems. This covers some of the

error messages related to disk failure you might encounter in the system’s error log, in your

electronic mail, or from LVM commands.

 Confirming Disk Failure: what you should check to make sure the disk is failing. This includes a

simple three-step approach to validate a disk failure if you do not have online diagnostics.

 Gathering Information About a Failing Disk: what you must know before you remove or replace the

disk. This includes whether the disk is hot-swappable, what logical volumes are located on the disk,

and what recovery options are available for the data.

 Removing the Disk: how to permanently remove the disk from your LVM configuration, rather than

replace it.

 Replacing the Disk: how to replace a failing disk while minimizing system downtime and data loss.

This section provides a high-level overview of the process and the specifics of each step. The exact

procedure varies, depending on your LVM configuration and what hardware and software features

you have installed, so several disk replacement scenarios are included. The section concludes with

a flowchart of the disk replacement process.

You do not have to wait for a disk failure to begin preparing for failure recovery. This paper can help

you be ready when a failure does occur.

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Seagate ST34572WC Especificaciones Pagina 3