Replacing a disk in a disk shelf

Reasons to replace a disk

You can replace a disk in a disk shelf for any reason. However, the most common reason is disk failure. If a disk fails, the storage appliance logs a warning message to the system console indicating which disk on which loop failed.

In addition, a disk shelf with an ESH module identifies any one of the following situations as disk failure:

A disk is bypassed
The filer system boots with the presence of bypassed disks
The filer system detects an eminent threshold bypass

The following autosupport warning message is then sent:

DISK FAIL!! - Bypassed by ESH

Preparing to replace a disk

Before you replace a disk in a disk shelf, you must first check the disk shelf to ensure that after you remove the disk you still have enough disks installed to meet the enclosure services requirements. For information about these requirements, see Drive bay requirements.

About replacing a disk in a disk shelf

Replacing a disk in a disk shelf consists of the following procedures:

Removing a disk

To remove a disk, complete the following steps.

Step	Action
1	If the disk shelf connects to a...	Then...
	Filer/FAS appliance	If you are removing disk that is a member of a volume, enter: disk fail disk_name If you are removing disk that is a spare disk, enter: disk remove disk_name Either command causes the amber fault LED on the disk to illuminate. For more information about LEDs, see Monitoring the Fibre Channel disk. For more information about disk commands, see the Data ONTAP System Administrator's Guide.
	NetCache appliance	In the NetCache Manager utility, select Maintenance tab > Disk > Management. From the Disk Type column of the Disk Status table, identify the disk that you want to remove. Click Fail. Click Swap Drive. For more information about disk management, see the NetCache Appliance System Administration Guide.
2	Wait 30 seconds for the disk to stop spinning.
3	Put on the antistatic wrist strap and grounding leash.
4	To remove the disk, press down on its release mechanism with one hand while grasping the top flange of the disk shelf with the other hand. Gently slide the disk out of the disk shelf. WARNING When removing a disk, always use two hands to support its weight.

Installing a disk

To install a disk in a disk shelf, complete the following steps.

Step	Action
1	Put on the antistatic wrist strap and grounding leash.
2	Orient the device carrier so that the release mechanism is at the top.
3	Insert the device carrier into the guide slot in the disk shelf and firmly push it in until it engages the backplane and you see the release mechanism click into place. Note If the device carrier does not fully seat in the drive bay, you may be trying to install a DS14 device carrier into a DS14mk2 FC disk shelf. Caution Do not slam the device carrier into place.
4	Make sure that disks are installed in drive bays 0 and 1 for Enclosure Services to work.