Removing disks

Reasons to remove disks

You remove a disk for the following reasons:

It is a failed disk. You cannot use this disk again.
It is a hot spare and you want to use it elsewhere.
It is a data disk, is producing excessive error messages, and is about to fail. You cannot use this disk again.
Note
You cannot reduce the number of disks in a file system by removing data disks. The only way to reduce the number of data disks in a file system is to copy the data and transfer it to a new file system that has fewer data disks.

Removing a failed disk

To remove a failed disk, complete the following steps.

Note
In the following procedure, the NearStore R100 appliance and the original-capacity R150 appliance use disks on SCSI-attached shelves. The R150 appliance with upgraded 24 TB capacity and the R200 appliance use disks on Fibre-Channel-attached shelves.

Step	Action
1	Find the disk ID of the failed disk by entering the following command: vol status -f Result The ID of the failed disk is shown next to the word failed. The location of the disk is shown to the right of the disk ID, in the column HA SHELF BAY.
2	If the disk is a...	Then...
	Fibre Channel disk or in a Fibre-Channel-attached shelf	Go to Step 3.
	SCSI disk or in a SCSI-attached shelf	Enter the following command and go to Step 3: disk swap
3	Remove the disk from the disk shelf according to the disk shelf manufacturer's instructions.

Removing a hot spare disk

To remove a hot spare disk, complete the following steps.

Step	Action
1	Find the disk IDs of hot spare disks by entering the following command: vol status -s Result The names of the hot spare disks appear next to the word spare. The locations of the disks are shown to the right of the disk name.
2	Enter the following command to spin down the disk: disk remove disk_name disk_name is the name of the disk you want to remove (from the output of Step 1).
3	If the disk is...	Then...
	A Fibre Channel disk or in a Fibre Channel attached shelf	Go to Step 4.
	A SCSI disk or in a SCSI-attached shelf	Enter the following command, and go to Step 4: disk swap
4	Wait for the disk to stop spinning. See the hardware guide for your disk shelf model for information about how to tell when a disk stops spinning.
5	Remove the disk from the disk shelf, following the instructions in the hardware guide for your disk shelf model. Result: File service resumes 15 seconds after you remove the disk.

Removing a data disk that is about to fail

To remove a data disk that is about to fail, complete the following steps.

Step	Action
1	Find the disk name in the log messages that report the errors by looking at the numbers that follow the word Disk.
2	At the filer, enter the following command: vol status -r
3	Look at the HA.ID column of the output of the `sysconfig -r` command. It shows the disk ID of each disk. The location of the disk appears to the right of the disk ID, in the column HA SHELF BAY.
4	Enter the following command to fail the disk: disk fail disk_name disk_name is the disk name from the output in Step 1. Result After you complete this step, the system operates in degraded mode, which means that a disk is missing from the RAID group.
5	If the disk is...	Then...
	A Fibre Channel disk or in a Fibre Channel attached shelf	Go to Step 6.
	A SCSI disk or in a SCSI-attached shelf	Enter the following command, then go to Step 6: disk swap
6	Remove the disk from the disk shelf, following the instructions in the hardware guide for your disk shelf model. Result: File service resumes 15 seconds after you remove the disk.

Removing disks

Reasons to remove disks

Removing a failed disk

Result

Removing a hot spare disk

Result

Result:

Removing a data disk that is about to fail

Result

Result: