By Paul Massiglia
The 1st how-to consultant for on-line garage administration with home windows 2000
during this e-book, specialist Paul Massiglia first offers a transparent educational at the ideas of controlled on-line garage after which walks you thru the fundamentals of the way to control your disks and RAID arrays within the home windows 2000 server surroundings. He presents all of the info process directors have to make the most of home windows 2000's robust new features for dealing with huge numbers of disks and RAID subsystems. utilizing either the embedded services of the home windows 2000 working method, VERITAS quantity Manager--the de-facto common for software storage--and different operating examples, Massiglia in actual fact illustrates tips to set up disks in order that all software facts will be given the ideal stability of availability, I/O functionality, and on-line garage rate. Readers will know about on-line garage architectures, failure and non-failure tolerant volumes, RAID, on-line disks, and growing and handling volumes.
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Extra info for Highly available storage for Windows servers
Hundred to SubDisk C. In the volume block address space, the last block of SubDisk A (block 99) immediately precedes the first block of SubDisk B. Similarly, the last block of SubDisk B precedes the first block of SubDisk C. TE File systems would perceive this volume as a single 300-block disk. For example, assume that SubDisk C occupies the lowest-numbered blocks on its disk. 2 The data would be delivered to the file system as though it had come from block 205 of a 300-block disk. Obviously, creating a spanned volume is a quick way to add storage to a volume, with minimal effect on its characteristics.
Stripe or distribute data across disks for improved performance and present the combined capacity as a single large virtual disk. 15 Intelligent disk subsystem with aggregating disk controller. 20 CHAPTER ONE ■■ Mirror identical block contents on two or more disks or striped volumes, and present them as a single failure-tolerant virtual disk. ■■ Combine several disks using Redundant Array of Independent Disk (RAID) techniques to stripe data across the disks with parity check data interspersed, and present the combined available capacity of the disks as a single failure-tolerant virtual disk.
Host-based volume-manager mirroring can be used similarly to augment RAID controller capabilities. Why Striped Volumes Are Effective Striping data across several subdisks located on different disks tends to improve I/O performance for both I/O request-intensive and data transferintensive applications, but for different reasons. The following sections describe how striped volumes enhance I/O performance for these two classes of I/O-bound applications. Striped Volumes and I/O RequestIntensive Applications The performance of I/O request-intensive applications is most often limited by how fast a disk can execute I/O requests.
Highly available storage for Windows servers by Paul Massiglia