Dell MD3200, MD3220 owner manual RAID Controller Module Connectors, Cache Functions and Features

RAID Controller Module Connectors

and Features	32
RAID Controller Module—Additional Features	34
Battery Backup Unit	34
Storage Array Thermal Shutdown	35
System Password Reset	35

Cache Functions and Features	36
Cache Mirroring	36
Write-Back Cache	36
Write-Through Cache	36

4Planning: MD3200 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	40
RAID Level Usage	41
Segment Size	43
Virtual Disk Operations	43
Virtual Disk Initialization	43
Background Initialization	43
Foreground Initialization	43
Consistency Check	44
Media Verification	44

4

Contents