October 2021
Intermediate to advanced
746 pages
44h 42m
English
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Chapter 4: Mirrored & hybrid arrays
Abstract
Mirrored disks classified as RAID1 protect against disk failures by storing data twice doubling disk access bandwidth. Hybrid Disk Arrays - HDAs store the XOR of pairs or more generally subsets of disks to provide a higher reliability level than RAID1, Basic mirroring is susceptible to disk overload when disk failures occur. Several RAID1 organizations which allow disk load balancing after disk failure are presented. Access latency can be improved by data placement and disk scheduling, e.g., accessing the disk whose arm is closer to the requested data block. The fact that a disk failure in Basic Mirroring - BM results in the doubling of the load on surviving disk has led to several RAID1 configurations, ...
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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.