Sonnet Technologies Fusion RAID Configuration Tool and Utilities Operation Manual - Manual (Page 34)

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1.6 RAID Group Media Maintenance
Cancel, Pause, or Resume a Media Scan
Media Scan functions for a parity RAID group may be paused,
resumed and cancelled. The Configuration Tool provides menu
items to pause and resume, and CLI provides a command to
cancel the Media Scan. The results of the Media Scan up to the
time of the pause or cancel are saved persistently.
Media Scan functions for Hot Spare and unallocated drives can
be cancelled, but cannot be paused. Media Scan of Hot Plug
and unallocated drives are run immediately and they are not
scheduled. The Configuration Tool provides menu items to start
and cancel Media Scan functions on these drives.
1. Select the RAID group being scanned in the groups pane.
2. Control-click (or right-click) the RAID group and select
Pause Media (or Parity) Scan to pause the Media Scan, or
Cancel to stop the Media Scan. You may also select RAID
Management >
Pause Media (or Parity) Scan, or RAID
Management > Cancel from the application menu.
Note: You may resume a paused Media Scan operation by control-
clicking (or right-clicking) the RAID group that was being
scanned and selecting Resume Media Scan, or by selecting RAID
Management > Resume from the application menu.
Manage Scheduled Media Scans
1. Click the Tasks tab.
2. Select the RAID group scheduled for a Media Scan.
3. Control-click (or right-click) the RAID group and select
Reschedule to change the Media Scan schedule, or
Delete to delete the Media Scan. You may also select Task
Management > Reschedule, or Task Management > Delete
from the application menu. See
Figure 26 on page 31.
Automatic Media Scan Cancellation
A Media Scan may be automatically cancelled for the following
reasons:
• A parity RAID group being scanned requires a rebuild operation
• A parity RAID group is being scanned and the last drive is
marked “Faulted”
• A Hot Spare being scanned is needed for a RAID group rebuild
• An unallocated drive being scanned is needed for a RAID group
rebuild
A Media Scan is not cancelled in the following scenario:
• An unallocated drive cannot be added to a RAID group when a
Media Scan is active on the drive.
The Media Scan must be manually cancelled in the above
scenario.
View a Scan Report
1. Select the Sonnet RAID controller from the Device Listing
pane.
2. Select the RAID tab in the right pane.
3. Select the RAID group, Hot Spare drive(s) or unallocated
drive(s) whose scan report should be displayed. One RAID
group can be selected or multiple Hot Spare and unallocated
drives can be selected.
4. Select RAID Management > Scan Report from the application
menu.
5. A Media Scan Error Report message box appears with the
scan results. See Figure 27 on page 31. If a scan is currently
in process, the Scanned column indicates the percent
complete for the operation.
The Scan Report includes the counts for the most recent scan and
the total results for all Media Scan operations. This information
is persistent for RAID group drives and Hot Spare drives since
it is stored in the drive’s metadata. The results may be erased
from the drive when the metadata is rewritten, e.g. a Hot Spare’s
information is lost when the Hot Spare is added to a RAID group.
The Media Scan results for an unallocated drive are only available
until a reboot occurs.
Media Scan provides the following metrics:
• Media errors detected on most recent scan in the Errors
column.
• Media errors corrected on most recent scan.
• Total stripe groups scanned on most recent scan. This data is
not displayed in Configuration Tool.
• Media errors detected on all scans in the Total Errors column.
• Media errors corrected on all scans.
• Total number of all scans in the Scans column.
The Media Scan Error Report does not display the count of
corrected errors. The corrected error count is displayed while the
mouse pointer hovers over the Errors or Total Errors value for a
specific drive. If the detected errors do not equal the corrected
errors the warning icon appears to the left of device name
column.
The Scan Report is updated by the Configuration Tool every 10
seconds. The metrics are not updated when the Media Scan is
paused.