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Chapter 6. Installing And Configuring Your SME Server V5 with ServiceLink Software
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 RAID controller listed in the section in Chapter 4 on supported SCSI adapters.
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 suggested hardware RAID controllers, you will be able to upgrade from an earlier version of the server to
version 5.0 using the standard upgrade process . You should back up all your data and test carefully after installation.
6.3. Upgrading From A Previous Version
If you have previously installed a server or an e-smith server and gateway and now wish to upgrade to version 5.0, you can do so
while preserving your configuration data. To do so, select Upgrade from the appropriate screen in the installation process.
While the upgrade should proceed smoothly, we do recommend that you back up your system prior to performing this upgrade just to
be safe.
Warning
It is not possible to use the Upgrade option to add software mirroring (RAID1) to an existing server.
If you previously installed software mirroring with server version 4.1, you should be able to upgrade without any problems.
However, if you want to upgrade a version of the server server prior to 4.1 (or an server 4.1 that was not installed with
software mirroring) to use software mirroring (RAID1) support, you should:
1. perform a backup through the server manager
2. perform a fresh install selecting the software mirroring option
3. restore the backup through the server manager
If you do choose to use software mirroring in version 5.0, we expect that you will be able to upgrade to future versions of
the SME Server V5 with ServiceLink.
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