Installing a disk shelf in an existing mixed-shelf loop

Assumptions about the existing mixed-shelf loop

This section is based on the assumption that the last disk shelf in the existing mixed-shelf loop connected to your storage system is not a DS14 or DS14mk2 FC disk shelf.

A DS14mk2 AT disk shelf is only compatible with similar shelves and cannot be added to a mixed-shelf loop.

Note
If the last disk shelf in your storage system is a DS14, DS14mk2 FC, or DS14mk2 AT, you can add the disk shelf to the loop without shutting down the system. Go to Hot-adding a DS14, DS14mk2 FC, or DS14mk2 AT to an existing loop.

Attention
Do not attempt to add a DS14/DS14mk2 FC disk shelf that has ESH or ESH2 modules to a mixed-shelf loop.

Installing the disk shelf

To install a DS14/DS14mk2 FC disk shelf into an existing mixed-shelf loop on a storage system, complete the following steps.

Attention
If you are installing a DS14 or DS14mk2 FC disk shelf into a loop that contains FC7, FC8, or FC9 disk shelves, the DS14 or DS14mk2 FC must be the last disk shelf in the loop and must have the highest disk shelf ID in the loop to avoid address conflicts.

Step	Action
1	Put on the antistatic wrist strap and grounding leash.
2	Shut down the storage system by entering the following command at the console: halt Attention Always use the `halt` command to perform a clean shutdown.
3	Verify that the LCD display at the front of your storage system displays the following message: Halted
4	Turn off the power to your storage system and the disk shelves.
5	Install the disk shelf, attach grounding cables, and connect the disk shelf to a power source. See the DiskShelf14 and DiskShelf14mk2 FC Hardware Guide for more information.
6	If the last disk shelf in the loop is...	Then...
	An FC7 or FC8 disk shelf	Remove the terminator from the Output/Terminator connector and go to Step 7.
	An FC9 disk shelf	Go to Step 7.
7	Connect one end of the provided cable to the Output/Terminator connector of the LRC A on the last disk shelf in the loop.
8	Connect the other end of the cable to the LRC A Input on the disk shelf that you are adding. The following illustration shows a DS14mk2 FC disk shelf installed above an FC9 disk shelf.
9	If the DS14/ DS14mk2 FC...	Then...
	Is the only disk shelf being added to the loop	Connect one end of the provided cable to the LRC B Input on the disk shelf. Connect the other end of the cable to the LRC B Output on the disk shelf. Turn the terminate switches on LRCs A and B to the On position. Note Because LRC B on the disk shelf is inverted, the On termination position on LRC B is up instead of down.
	Is the first of additional DS14/DS14mk2 FC disk shelves being added to the loop	Turn the terminate switch on the first disk shelf in the mixed-shelf loop to the Off position for LRC A (up) and LRC B (down). Connect one end of the provided cable to the LRC B Output on the first disk shelf in the mixed-shelf loop. Connect the other end of the cable to the LRC B Input on the next disk shelf that you added to the mixed-shelf loop. Verify that the terminate switch on all but the last disk shelf is in the Off position for LRC A (up) and LRC B (down). The terminate switches on the last disk shelf should be in the On position.
10	Give the disk shelf a unique disk shelf ID. See the DiskShelf14 and DiskShelf14mk2 FC Hardware Guide for additional information. Note A valid shelf ID is 1 through 7. Only use disk shelf ID 7 if it is the last ID available on this loop. A shelf ID that is not from 1 through 7 causes the drive addresses to default to those of a shelf with the ID switch set to 7, even though the Shelf ID indicator in the front operation panel displays a dash (-).
11	If your disk shelf is a...	Then...
	DS14mk2 FC with an LRC module	Set the loop speed switch to 1 Gb. Attention An incorrectly set loop speed results in an open loop condition.
	DS14	Go to Step 12.
12	Turn on the power first to the disk shelves and then to the storage system.
13	Reboot the storage system.