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Whether your controller enclosure product is a 2U24 or 2U12 model, a fully functional replacement
chassis requires the successful removal and installation of the following components:
• All disk drive modules and air management modules
• Two ear bezels (for left and right ears)
Some models use an enclosure bezel instead of left and right ear covers
• Two power supply units of the same type (both AC or both DC)
• One or two controller modules (of the same model type) and possibly an I/O module blank (for
single-controller enclosures)
Certain models also require the successful removal and installation of the following components:
• Fibre Channel transceiver (SFP for 3920/3930, 3723/3733, and 3720/3730 models)
• 10GbE SFP+ transceiver (SFP+ option for 3420/3430 models)
This procedure makes extensive use of the FRU component procedures described elsewhere in Chapter 2.
Perform this procedure by following the step-by-step process described below.
Before you begin
CAUTION: Do not remove the enclosure until you have received the replacement enclosure.
See CAUTION bullets regarding "electrostatic discharge" and "anti-static protection" on
1. Schedule down time that will allow for shutdown; sixty minutes of replacement work; and restart.
2. Verify the existence of a known/good backup of the system.
3. Record system settings for future use.
4. Label all cables.
5. Prepare a suitable work environment to accommodate chassis replacement.
Verifying component failure
The controller enclosure FRU includes the enclosure's metal housing and the midplane that connects
controller modules, disk drive modules, and power supply modules. This FRU replaces an enclosure that
has been damaged, or whose midplane has been damaged.
Often times, a damaged midplane will appear as though a controller module has failed. If you replace a
controller module, and it does not remedy the fault, you may need to replace the enclosure.
Alternatively, you can observe enclosure health (front panel and rear panel) using management interfaces
to verify enclosure/component failure or enclosure/component operation (see
interfaces
on page 55 for more information).
Preparing to remove a damaged storage enclosure chassis
Since you are removing and replacing an entire controller enclosure, neither the hot-swap capability that
applies to replacing individual redundant FRUs in an operational controller enclosure, nor the hot-add of a
drive enclosure to an operational storage system, apply to this procedure.
1. Stop all I/O from hosts to the system. See
2. Shut down the controller(s). See
3. Power off the system (controller enclosure first; drive enclosure(s) next). See
page 42, and refer to the power cycling procedures pertaining to your enclosure's power supply
modules.
52
Procedures
Stopping I/O
Shutting down a controller module
Using management
on page 31.
on page 31.
Power supply units
page
27.
on
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