December 2002
Intermediate to advanced
260 pages
9h 18m
English
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System Installation
Normally you need to configure a hardware array using the controller’s BIOS before you can install an operating system. However, there are a few exceptions when creating an array first is undesirable.
The first case is when you already have an operating system on a disk that is connected to the controller. This usually happens when you upgrade an existing system by installing a RAID controller. Some controllers support a pass-through mode, which means that you can connect an existing system disk to a new controller and boot the system normally, without any additional configuration. However, not all controllers support this pass-through mode. In that case, you first need to configure the existing system disk as a JBOD mode array. I’ve included cookbook examples for setting up JBOD modes for existing system disks in many of the sections about individual controllers, later in this chapter.
Since many users upgrade from a single disk environment to a RAID-1 configuration, I have also included cookbook examples that will help you migrate from a single disk system to RAID-1, using the controllers that I have evaluated. These procedures are often not documented, even though they represent a common task that many users and system administrators need to perform.
Unfortunately, it’s really not possible to move from a single disk system to any RAID level other than JBOD or disk mirroring. Although moving from a single disk to a RAID-0 or RAID-5 might be highly desirable, it ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.