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What is the difference between windows 2000 and windows 2003
server features?
what is ASR?
What are the roles of FSMO? Which are Forest level roles and
Domain level roles?
What are the steps taken while moving the FSMO roles?
Types of RAID and brief description ?
Which are all fault tolerant raids?
What is the actual disk space utilised in RAID5 and RAID1?
What is the diff btwn Mirroring and Duplexing?
What are the different types of partitions in Active Directory?
What is the database file name created when ADS is installed
and where is it stored?
What are the types of Sites available?
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Answer Posted / madan
Microsoft® Windows NT® and Windows® 2000-based disk mirroring and duplexing implement RAID (redundant array of independent disks) features in software using any hardware compatible with the operating system. Because these are software-based solutions provided with the operating system, they offer a cost advantage.
Disk mirroring protects against media failure by maintaining a fully redundant copy of a partition on another disk. This provides protection from the downtime and expense involved in recovering lost data and restoring data from a backup storage facility. In a sense, mirroring is continual backup. Mirroring also provides some performance benefits when reading data from disks under heavy I/O loads. Windows NT–based disk mirroring and Windows 2000 mirrored volume implement RAID 1.
Disk duplexing is a form of mirroring that provides protection against controller failures (in addition to protecting against media failures) by using a different disk controller on the mirror disk.
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