Mitel SME Server V5 with ServiceLink Podręcznik Użytkownika Pobierz pdf (Strona 23)

Chapter 6. Installing And Conﬁguring Your SME Server V5 with ServiceLink Software

6.1. Licensing Terms and Conditions

In installing the SME Server V5 with ServiceLink software, you are agreeing to the open source licensing terms and conditions associated with it.

You can read these terms and conditions in the introduction to this guide under the title Software Licensing Terms and Conditions.

Warning

The computer on which you install this software will be totally dedicated to being your SME Server V5 with ServiceLink. The hard drive of

this computer will be erased and re-written with the Linux operating system - dramatically enhancing the reliability of your server over

other operating systems. However, this means that while this computer is acting as your server, you cannot use it for any other purpose.

Note: If you have previously installed and conﬁgured a server and are reinstalling the software, please be aware that you must use the Upgrade

option in order to preserve your existing conﬁguration and data. Simply performing a new installation will erase all previously existing user

accounts, user directories, i-bay contents and web site and conﬁguration parameters. If you have not already done so, you may wish to back up the

contents of your server onto one of your desktop computers. You can do so easily by selecting "Backup or restore" from the server manager, as

explained in the chapter on on-going administration of your server.

6.2. RAID1 Support (Disk Mirroring)

With SME Server V5 with ServiceLink, you have the ability to set up disk mirroring, also called RAID Level 1. In disk mirroring, you basically

write all of your data to two separate hard disks installed in your server. One is the mirror of the other. Should the primary disk experience a

hardware failure, the mirror disk will continue operations as if nothing had happened. All of your data will be protected.

Disk mirroring can be accomplished through either software or hardware .

6.2.1. Software Mirroring

To enable software RAID1 support, you must ﬁrst have two disks that are either the same size or capable of having partitions of the same size. They

can be either SCSI or IDE drives. They must both be installed in your system prior to installing the SME Server V5 with ServiceLink

software. Software RAID support can only be conﬁgured at the time you install the software. If you choose not to conﬁgure RAID support on

your server, and later wish to do so, you will need to reinstall the SME Server V5 with ServiceLink software.

Once you have two disk drives, activating RAID support requires only a very slight change in the software installation process.

Note: SME Server V5 with ServiceLink supports a software implementation of RAID Level 1, known as disk mirroring. It does not support RAID

Level 0 (disk striping), as that does not provide any protection of your data whatsoever. It does not support RAID Level 5 (disk striping with parity)

because of the poor performance and reliability of software implementations of RAID5. If you are seeking RAID5 support, Mitel Networks

Corporation recommends you consider one of the many hardware implementations which will provide both protection and performance.

6.2.2. Hardware Mirroring

With hardware mirroring, you use a special RAID disk controller to perform the actual mirroring across multiple disks. As mirroring is performed in

hardware, the performance can be signiﬁcantly faster than software mirroring. Additionally it can simplify conﬁguration because to the operating

system the entire RAID disk system looks like one single disk. You should be able to use any supported SCSI hardware RAID controller.

If you are going to use hardware mirroring, you should NOT choose Install - Dual hard disk with software RAID-1 mirroring in the installation

process. (Doing so will enable software mirroring.) Instead, you should do a regular installation of the software.

Note: Using one of the supported hardware RAID controllers, you will be able to upgrade from an earlier version of the SME Server to version 5.1

using the standard upgrade process . You should back up all your data and test carefully after installation.

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