Hot-upgrading or hot-downgrading a disk shelf

When you can hot-upgrade or hot-downgrade

You can hot-upgrade a disk shelf with an LRC into a disk shelf with an ESH or ESH2, or hot-downgrade the disk shelf with an ESH or ESH2 into a disk shelf with an LRC, if your filer system incorporates redundancy through multipathing.

Note
MetroClusters are the only systems that use multipathing.

Caution
You must hot-upgrade or hot-downgrade all disk shelves in the loop.

Requirements for hot-upgrading or hot-downgrading

To hot-upgrade a disk shelf or hot-downgrade a disk shelf, the following requirements must be met.

Disk shelf loop speed	Hot-upgrade	Hot-downgrade
DS14 (only available at 1-Gb loop speed)	LRC to ESH or ESH2 hot-upgrade is supported.	ESH or ESH2 to LRC hot-downgrade is supported.
DS14mk2 FC set at 1-Gb loop speed	LRC to ESH or ESH2 hot-upgrade is supported.	ESH or ESH2 to LRC hot-downgrade is supported.
DS14mk2 FC set at 2-Gb loop speed	Not applicable ESH to ESH2 is supported. SeeHot-swapping a module.	ESH or ESH2 to LRC hot-downgrade is not supported. ESH2 to ESH hot-downgrade is supported.

Hot-upgrading or hot-downgrading a disk shelf

To hot-upgrade or hot-downgrade a disk shelf, complete the following steps.

Step	Action
1	Put on the antistatic wrist strap and grounding leash.
2	If you are working with...	Then...
	A non MetroCluster system	From the console of the partner appliance, enter the following command to disable all the LRC, ESH, or ESH2 modules in Loop A: cf takeover
	A MetroCluster system	Go to Step 3.
3	If you are...	Then...
	Hot-upgrading the disk shelf	Note the position of the terminate switch on the LRC you are removing and set the terminate switch on the ESH to the same setting before inserting it into the disk shelf. Note ESH2 is self-terminating and does not have a terminate switch.
	Hot-downgrading the disk shelf from an ESH to an LRC	Note the position of the terminate switch on the ESH you are removing and set the terminate switch on the LRC to the same setting before inserting it into the disk shelf.
	Hot-downgrading the disk shelf from an ESH2 to an ESH or LRC	On all but the last disk shelf in the loop, place the terminate switch to the Off position on ESH/LRC A (up) and ESH/LRC B (down).
4	Disconnect the LRC, ESH, or ESH2 from the Fibre Channel cabling and remove the cabling.
5	Using the thumb and index finger of both hands, press the levers on the CAM mechanism on the module to release it and pull it out of the disk shelf.
6	Slide the module into the slot at the rear of the disk shelf and push the levers of the CAM mechanism into place. Caution Do not use excessive force when sliding the module into the disk shelf; you might damage the connector.
7	If you are...	Then...
	Hot-upgrading a disk shelf from an LRC to an ESH	Reconnect the Fibre Channel cabling by using LC-to-LC cables when connecting to optical FC-AL adapters, and with HSSDC2-to-HSSDC2 cables for connections between shelves.
	Hot-upgrading a disk shelf from an LRC to an ESH2	Reconnect the Fibre Channel cabling by plugging an optical SFP into the ESH2 Input port and using an LC-to-LC cable when connecting to optical FC-AL adapters and with SFP-to-SFP cables for connections between shelves.
	Hot-downgrading a disk shelf from an ESH2/ESH to an LRC	Reconnect the Fibre Channel cabling by using HSSDC to DB-9 cables when connecting to copper FC-AL adapters or SC-to-LC cables when connecting to optical FC-AL adapters, and with DB-9 to DB-9 cables for connections between shelves.
	Hot-downgrading a disk shelf from an ESH2 to an ESH	Reconnect the Fibre Channel cabling by using LC-to-LC cables when connecting to optical FC-AL adapters, and with HSSDC2-to-HSSDC2 cables for connections between shelves.
8	Repeat Step 2 through Step 7 for the remaining LRC, ESH, or ESH2 modules in the loop.
9	From the console of the appliance, enter the following command to verify that the modules in Loop A report good status: environ shelf As long as only the modules in loop A are upgraded, you also receive the following error message: Element 1: component is from a different product family. This is an unsupported configuration. Note Both modules in the disk shelf must be the same. A mixed module configuration is supported during the hot-swap procedure, but it is not a supported configuration for long-term operation.
10	From the console of the appliance, enter the following command to enable the Loop A: cf giveback
11	Repeat Step 1 through Step 10 for Loop B.