LSI 3ware SAS 9750-8i User's Guide download pdf (Page 232)

3DM 2 Reference

220 3ware SATA+SAS RAID Controller Card Software User Guide, Version 10.0

Rescanning is useful in a variety of maintenance tasks. For example, if you

physically plug in a drive and want the controller to recognize the newly

plugged-in drive, Rescan will find it.

Rescan checks all ports. It 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, 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.

Unit Maintenance

The Unit Maintenance section of the page lists all existing units on the current

controller, and displays summary information about them.

The top row shows information about the unit, while subsequent rows show

summary information about each drive in the unit.

Unit Information

Note: If you unplug a drive without first removing it through 3DM 2, Rescan may

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 hot swap bays can

result in a system hang or may even damage the system and the drive.

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LSI 3ware SAS 9750-8i User's Guide Page 232