December 2002
Intermediate to advanced
260 pages
9h 18m
English
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Existing Arrays
If you have inherited a system that already uses software RAID, you need to decide whether you’re going to continue maintaining that array or retire it and migrate the data to a new array (hardware or software). The rest of this chapter focuses on constructing new software arrays. If you plan to keep maintaining an array that already exists, read Chapter 4 and Chapter 7.
If you want to scrap an existing RAID, this section offers some advice that will help you dismantle the array. It’s vital to keep in mind that reconfiguring an array or reusing its member disks in new arrays means that existing data will be lost. So it’s very important to back up any data before proceeding.
Tip
In certain cases, it’s possible to remove a member disk without losing data on an array. For example, removing an unused spare disk from a RAID-1 or RAID-5 will not cause data loss, although it might reduce fault tolerance.
If you plan to scrap all your existing arrays and use hardware RAID, skip straight to Chapter 5; the preparatory steps in this section do not apply to that situation.
Finally, if you are experimenting with various RAID levels and plan to reuse partitions that you have already included in another array, you might need to take some additional steps before building the new array. Remember that reusing these partitions means that the data on them will be destroyed, along with your array. Furthermore, you will not be able create a new array using partitions that are members of an ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
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.