Adaptec 5325301656 - Snap Server 14000 NAS, Руководство администратора

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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 ).