Download E-books Managing RAID on Linux PDF

By Derek Vadala

Redundant Array of self reliant Disks (RAID) expertise is changing into a customary characteristic of computers that help mission-critical providers like dossier sharing, mail alternate, or internet servers. RAID deals merits to those crucial structures: greater I/O functionality and fail-safe information storage.Although bandwidth difficulties on networks are good documented, the inner info move bottleneck that exists on the point in every one approach may also go away you with complicated functionality concerns. RAID is an economical and easy-to-manage approach to alleviate this bandwidth challenge through dispensing the I/O load seamlessly throughout a number of disks and controllers.RAID additionally offers uninterrupted info entry via disk mirroring and parity algorithms. that implies structures can stay on-line even in the course of a disk or controller failure. RAID is scalable, making it powerful adequate for big, high-traffic websites and small, serious structures. through the use of RAID, method directors can mix unmarried disks into terabytes worthy of information storage.Managing RAID on Linux covers every little thing approach directors want to know to place jointly a procedure that could aid RAID. you'll find out about the differing kinds of RAID, besides linked applied sciences and concerns, and the way to settle on the easiest RAID procedure to your wishes. With a step by step, hands-on process, the writer publications you thru the set up of both Linux software program RAID or a RAID card. The publication indicates find out how to construct an array and optionally set up a high-performance dossier method. Contents include:

* An creation to RAID and Linux
* making plans and structure of your RAID system
* development a software program RAID
* software program RAID instruments and references
* construction a RAID
* functionality and tuning of your RAID system

RAID has develop into the inexpensive resolution of option to care for the ever-increasing call for for facts space for storing. Written for method directors, energy clients, tech managers, and a person who desires to find out about RAID know-how, coping with RAID on Linux sidesteps the often-confusing vendor-specific technique you'll locate in different places to provide you the immediately tale on RAID. Even non-Linux clients will locate this booklet packed with useful fabric.

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The place these designations seem during this booklet, and O’Reilly & affiliates, Inc. was once conscious of a hallmark declare, the designations were revealed in caps or preliminary caps. The organization among just like a logjam and the subject of RAID on Linux is a hallmark of O’Reilly & affiliates, Inc. whereas each precaution has been taken within the coaching of this e-book, the writer and writer think no accountability for mistakes or omissions, or for damages caused by using the data contained herein. ISBN: 1-56592-730-3 [M] Table of Contents Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii 1. creation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 RAID Terminology The RAID degrees: an outline RAID on Linux as opposed to software program three 6 eight 10 2. making plans and structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . eleven or software program? The RAID degrees: intensive RAID Case stories: What should still i select? Disk disasters issues Making feel of all of it eleven 17 28 31 32 fifty six three. Getting begun: construction a software program RAID . . . . . . . . . . . . . . . . . . . . . . . . . . . . fifty nine Kernel Configuration operating with software program RAID developing an Array the next move 60 70 eighty one one hundred and five four. software program RAID Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106 Kernel thoughts md Block detailed records /proc and software program RAID raidtools mdadm 106 109 109 114 129 v 5. RAID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . a hundred forty five picking a RAID Controller getting ready Controllers and Disks normal Configuration matters Mylex Adaptec Promise know-how 3ware Escalade ATA RAID Controller LSI common sense (MegaRAID) a hundred forty five 148 a hundred and fifty a hundred and fifty five 167 174 181 184 6. Filesystems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187 easy Filesystem ideas The Linux digital Filesystem (VFS) ext2 ext3 Extensions for the ext2 Filesystem ReiserFS IBM JFS SGI XFS 188 191 192 197 201 207 210 7. functionality, Tuning, and upkeep . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214 tracking RAID units dealing with Disk mess ups Configuring harddisk Parameters functionality trying out Booting with software program RAID 214 216 221 227 227 A. extra assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233 B. RAID Controller owners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 236 Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 237 vi | desk of Contents Preface Linux has come a ways within the final decade. not relegated to the realm of hobbyists and builders, Linux is ubiquitous and is instantly taking carry of company and high-performance computing. confirmed organisations corresponding to IBM, Hewlett-Packard, and solar Microsystems have embraced Linux. Linux is now used to supply blockbuster movies, create real-time versions of globally climate styles, and reduction in medical and clinical examine. Linux is even used at the foreign house Station. Linux has finished this due to an unlimited, and possible tireless, community of builders, documenters, and evangelists who proportion the typical mantra that software program can be trustworthy, effective, and safe in addition to unfastened.

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