LSI MegaRAID SAS 9286-8e User's Guide download pdf (Page 15)

LSI Corporation

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6Gb/s MegaRAID SAS RAID Controllers User Guide

August 2012

Chapter 1: Overview

Summary of 6Gb/s MegaRAID SATA+SAS RAID Controller Characteristics

 They permit grouping of up to four PHYs in a single quad port to form a wide port.

 They permit programming of the World Wide Name.

1.6.7 Drive Roaming

Drive roaming occurs when the drives are changed to different ports on the same controller. When the drives are

placed on different channels, the controller detects the RAID configuration from the configuration data on the drives.

Configuration data is saved in both the NVRAM on the RAID controller and on the drives attached to the controller.

This action maintains the integrity of the data on each drive, even if the drives have changed their physical device ID.

Follow these steps to use the drive roaming feature:

1. Turn off the power to the server and all drives, enclosures, and system components. Disconnect the power cords

from the system.

2. Open the host system by following the instructions in the host system technical documentation.

3. Move the drives to different positions on the backplane to change the targets.

4. Determine

the SAS

target requirements.

5. Perform a safety check.

a. Make sure that the drives are inserted correctly.

b. Close the cabinet of the host system.

6. Reconnect the power cords to the system.

7. Turn on the power to the system.

The controller then detects the RAID configuration from the configuration data on the drives.

1.6.8 Drive Migration

Drive migration is the transfer of a set of drives in an existing configuration from one controller to another. The drives

must remain on the same channel and must be reinstalled in the same order as in the original configuration. The

controller to which you migrate the drives cannot have an existing configuration.

NOTE If you move a drive that is being rebuilt, the rebuild operation restarts; it does not resume from the

stopping point.

NOTE Partial configurations, which include individual virtual drives, can be migrated.

NOTE Drive roaming and drive migration cannot be supported at the same time.

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LSI MegaRAID SAS 9286-8e User's Guide Page 15