AMCC 3ware 9000 Series, User Manual

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3DM 2 Reference
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The Maintenance page lets you perform maintenance tasks on existing units
on the current controller (shown in the drop-down list on the menu bar), and
lets you create new units by configuring available drives.
Information about the Maintenance page is organized under these headings:
„
Rescan Controller
„
Unit Maintenance
„
Maintenance Task Buttons
„
Available Drives
Rescan Controller
Use the Rescan Controller button to have 3DM scan the available drives in
the controller and update the list of available drives shown. This is useful in
variety of maintenance tasks. For example, if you physically plug in a drive
and want the controller to recognize the newly plugged in drive.
Note: If you unplug a drive without first removing it through 3DM,
Rescan will not recognize it as gone unless the drive was in use or
until it is required by the system. Always use the
Remove link to
remove a drive before unplugging it.
Warning:
Physically removing or adding drives which are not in
hotswap carriers can result in a system hang or may even damage
the system and the drive.
In 9000-series controllers, rescan checks empty ports for newly plugged in
drives. If those drives were previously part of a 3ware RAID configuration
and they still have valid DCB (Disk Configuration Block) information on
them, the controller tries to piece them back together into a working unit. If a
working unit can be formed, it will appear in the Unit Maintenance list when
the scan is complete, and the operating system will be notified of the unit. In
Linux or FreeBSD, a device node will be associated with each unit created. In
Windows the device manager will reflect the changes under the disk drives
icon. This process is known as importing drives.
If new drives do not have any data indicating they were previously part of a
3ware RAID configuration, they will appear in the Available Drives list.
In addition, if there is a unit with the status Inoperable before a rescan (for
example, a RAID 5 unit missing 2 or more drives), and a rescan finds drives
that complete the unit, the inoperable unit will become a valid unit.