Adaptec 5325301656 Administration Guide - Page 59

RAID Groups, Function, Navigation Path

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RAIDs Background Disk Scan The background disk scan checks the integrity of RAID data by continuously scanning the disk drives for errors. Each RAID (except RAID 0) has its own background disk scan that is set to run when the I/O activity falls to a very low disk activity. Once the acitivity rises above the idle threshold, the background scan stops and waits for the activity to fall to the idle threshold again before resuming. As a result, there should be minimal to no impact on performance. Once the disk scan has completed a pass on a given RAID set, it waits a certain period of time before starting again. The background disk scan is enabled by default. To disable the background disk scan, go to the Storage > RAID Sets screen and click the RAID Settings button. Notes • If the background disk scan is disabled, it will still initiate a scan on a RAID if problems are detected on one of the RAID drives. • The background scan will not run on RAIDs that are degraded, syncing, or rebuilding. RAID Management Tools Snap Servers use the following tools for configuring and monitoring RAIDs: Function Ongoing Maintenance Email Notification Navigation Path Navigate to the Storage > RAID Set screen, from which you can create, assess, edit, and delete RAIDs. You can also disable or enable the Background Disk Scan and the automatic assignment of GuardianOS-partitioned unused disks to a degraded RAID. The server can notify you when a RAID is degraded, failed, or has experienced another error or maintenance condition. This allows you to take action to ensure workflows are not disrupted (Server > Email Notification). You can view the status of your RAID sets on the Storage > RAID Sets and Monitor > System Status screens. RAID Groups Two RAIDs can be grouped together to neatly resolve a number of capacity issues. For example, a volume on one RAID nearing full utilization can be expanded using spare capacity on another RAID. The ability to grow volumes beyond the capacity Chapter 4 Storage Configuration and Expansion 45

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RAIDs
Chapter 4
Storage Configuration and Expansion
45
Background Disk Scan
The background disk scan checks the integrity of RAID data by continuously
scanning the disk drives for errors. Each RAID (except RAID 0) has its own
background disk scan that is set to run when the I/O activity falls to a very low disk
activity. Once the acitivity rises above the
idle threshold
, the background scan stops
and waits for the activity to fall to the
idle threshold again before resuming. As a
result, there should be minimal to no impact on performance.
Once the disk scan
has completed a pass on a given RAID set, it waits a certain period of time before
starting again.
The background disk scan is enabled by default. To disable the background disk
scan, go to the
Storage > RAID Sets
screen and click the
RAID Settings
button.
Notes
•
If the background disk scan is disabled, it will still initiate a scan on a RAID if
problems are detected on one of the RAID drives.
•
The background scan will not run on RAIDs that are degraded, syncing, or
rebuilding.
RAID Management Tools
Snap Servers use the following tools for configuring and monitoring RAIDs:
You can view the status of your RAID sets on the
Storage > RAID Sets
and
Monitor >
System Status
screens.
RAID Groups
Two RAIDs can be grouped together to neatly resolve a number of capacity issues.
For example, a volume on one RAID nearing full utilization can be expanded using
spare capacity on another RAID. The ability to grow volumes beyond the capacity
Function
Navigation Path
Ongoing Maintenance
Navigate to the
Storage > RAID Set
screen, from which you
can create, assess, edit, and delete RAIDs. You can also
disable or enable the Background Disk Scan and the
automatic assignment of GuardianOS-partitioned unused
disks to a degraded RAID.
Email Notification
The server can notify you when a RAID is degraded, failed,
or has experienced another error or maintenance condition.
This allows you to take action to ensure workflows are not
disrupted (
Server > Email Notification
).