4

3 Planning: RAID Controller Modules . . . . 31

RAID Controller Modules

31

RAID Controller Module Connectors and Features . . .

32

RAID Controller Module—Additional Features

34

Battery Backup Unit

34

Storage Array Thermal Shutdown

34

System Password Reset

35

Cache Functions and Features

35

Cache Mirroring

35

Write-Back Cache

35

Write-Through Cache

36

4Planning: MD3600i Series Storage Array Terms and Concepts . . . . . . . . . . . . . . . . 37

Physical Disks, Virtual Disks, and Disk Groups

37

Physical Disks

38

Physical Disk States

38

Self-Monitoring Analysis and

 

Reporting Technology

39

Virtual Disks and Disk Groups

39

Virtual Disk States

40

RAID Levels

41

RAID Level Usage

41

Segment Size

43

Virtual Disk Operations

43

Virtual Disk Initialization

43

Consistency Check

44

Media Verification

44

Contents

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Dell MD3620I, MD3600I owner manual Planning RAID Controller Modules, Cache Functions and Features