4 Contents
RAID Controller Module Connectors and Features . . . 30
RAID Controller Module—Additional Features
. . . . . 32
Battery Backup Unit
. . . . . . . . . . . . . . . . 32
Storage Array Thermal Shutdown
. . . . . . . . . 33
System Password Reset . . . . . . . . . . . . . . 33
Cache Functions and Features. . . . . . . . . . . . . . 34
Cache Mirroring
. . . . . . . . . . . . . . . . . . . 34
Write-Back Cache . . . . . . . . . . . . . . . . . 34
Write-Through Cache
. . . . . . . . . . . . . . . . 34
4 Planning: MD3200 Series Storage
Array Terms and Concepts . . . . . . . . . . . 35
Physical Disks, Virtual Disks, and Disk Groups . . . . . 35
Physical Disks
. . . . . . . . . . . . . . . . . . . . 36
Physical Disk States
. . . . . . . . . . . . . . . . 36
Self-Monitoring Analysis and Reporting
Technology . . . . . . . . . . . . . . . . . . . . . 37
Virtual Disks and Disk Groups . . . . . . . . . . . 37
Virtual Disk States
. . . . . . . . . . . . . . . . . 38
RAID Levels
. . . . . . . . . . . . . . . . . . . . . . . . 38
RAID Level Usage
. . . . . . . . . . . . . . . . . . 39
Segment Size. . . . . . . . . . . . . . . . . . . . . . . 41
Virtual Disk Operations
. . . . . . . . . . . . . . . . . 41
Virtual Disk Initialization
. . . . . . . . . . . . . . 41
Background Initialization
. . . . . . . . . . . . . . 41
Foreground Initialization
. . . . . . . . . . . . . . 41
Consistency Check
. . . . . . . . . . . . . . . . . 42
Media Verification
. . . . . . . . . . . . . . . . . 42
Cycle Time
. . . . . . . . . . . . . . . . . . . . . . 42
book.book Page 4 Monday, June 21, 2010 11:00 AM
