Highly Available Storage for Windows Servers by Paul Massiglia

By Paul Massiglia

The 1st how-to advisor for on-line garage administration with home windows 2000 during this e-book, professional Paul Massiglia first presents a transparent educational at the rules 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 atmosphere. He presents the entire info process directors have to reap the benefits of home windows 2000's strong new services for dealing with huge numbers of disks and RAID subsystems. utilizing either the embedded features of the home windows 2000 working process, VERITAS quantity Manager--the de-facto common for software storage--and different operating examples, Massiglia basically illustrates how one can arrange disks in order that all program facts may be given the appropriate stability of availability, I/O functionality, and on-line garage expense. Readers will know about on-line garage architectures, failure and non-failure tolerant volumes, RAID, on-line disks, and developing and coping with volumes.

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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. The spanned volume continues to be accessed and managed as though it were a large single disk. The NTFS file system in Windows 2000 can use additional volume capacity immediately.

It is chiefly useful to predict failures that are characterized by gradual deterioration of some measurable disk parameter. SMART does not protect against sudden failures, as are typical of logic module failures. Because SMART reports refer to conditions that are deteriorating with time, system administrators must receive and act on them promptly. SMART is thus most useful in environments that are monitored constantly by administrators. 4 AT(advanced technology) Attachment; also known as extended IDE intelligent drive electronics, FCP = Fibre Channel Protocol Disk Storage Basics 19 SMART is indeed a useful technology for improving the reliability of data stored on disks, but it is most effective in protecting data against disk failures when used in conjunction with volume management techniques described later in Chapter 2.

Mirrored and RAID volumes are failure-tolerant; they are able to survive disk failures and provide continuous data access services. Chapters 3 and 4 describe the capacity, performance, and failure tolerance characteristics of these five types of volumes in more detail. CHAPTER 3 Volumes That Are Not Failure Tolerant Simple Volumes A simple volume consists of a single subdisk. The subdisk may consist of some or all of the available blocks on a single disk. Simple volumes are functionally equivalent to the partitions found in legacy Windows operating system environments.

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