IBM Partner Pavilion DS4100 manual Installing hot-swap hard disk drives, LED state Descriptions

Attention: After you remove a drive CRU, wait at least 70 seconds before replacing or reseating the drive CRU to allow the drive to properly spin down. Failure to do so may cause undesired events.

Before you install or remove drive CRUs, review the following information:

vBlank trays: A storage server without a full set of drives (14) contains blank trays in the unused drive bays. Before installing new drives, you must remove these empty trays. Save the empty trays for future use. Each of the 14 bays must always contain either a blank tray or a hot-swap hard disk drive.

Note: For proper cooling and EMC protection, do not leave a drive slot open without either a blank tray or a hard disk drive CRU inserted.

vDrive CRUs: The DS4100 supports up to fourteen IBM 1.5 Gbps SATA hard disk drives.

Note: Do not use fibre-channel hard disk drive CRUs in the DS4100.

These drives come preinstalled in drive trays. This drive-and-tray assembly is called a drive CRU. You can install the drive CRUs in the 14 drive bays on the front of the storage server.

vDrive CRU labels: A label is provided on the front of each hard disk drive. Use this label to record the location information for each drive before you remove it. Ensure that you keep track of the drives and their corresponding bays. Also, record the location information in Table 19 on page 119. If you install a drive in the wrong bay, you might lose data.

vDrive LEDs: Each drive tray has two associated LEDs, a green Activity LED and an amber Fault LED, on the chassis of the DS4100. These LEDs indicate the status for that drive. See Table 16 for the drive LED states and descriptions.

Table 16. Drive LED activity

LED	LED state	Descriptions
Activity LED	Flashing green	The green LED flashes to indicate fibre-channel activity to
		the drive.
Activity LED	Steady green	The green LED lights to indicate that the drive is properly
		installed and is spun up by the DS4000 controller.
Fault LED	Flashing	The amber LED flashes to indicate that a drive has been
	amber	identified by the software.
Fault LED	Steady amber	The amber LED lights to indicate a drive failure.
Activity and	All unlit	The storage server is powered off.
Fault LEDs

vFibre-channel loop IDs: When you install a drive CRU in the storage server, the drive CRU connects into a printed circuit board called the midplane. The midplane automatically sets the fibre-channel loop ID to the default value 00.

vHot-swap hardware: The storage server contains hardware that you can use to replace a failed hard disk drive without turning off the storage server. Therefore, you can continue operating the system while a hard disk drive is removed or installed. These drives are known as hot-swapdrives.

Installing hot-swap hard disk drives

You can install hard disk drives while the storage server is turned on and running. Complete the following steps to install hot-swap hard disk drives in the storage server:

80IBM TotalStorage DS4100 Storage Server: Installation, User’s, and Maintenance Guide