Chapter 2. Safety Guidelines; Safe Handling; Operation - IBM Medium J11 Hardware Installation And Maintenance Manual

Chapter 2. Safety guidelines

Safe handling

CAUTION: Use this equipment in a manner specified by the manufacturer: failure to do this may
cancel the protection provided by the equipment.
• For new enclosures, prepare the site for installation per "Installation checklist" on page 25,
and follow safe-handling instructions provided in "Unpacking the Disk Enclosure" on page 27
• Permanently unplug the enclosure before you move it, or if you think that it has become
damaged in any way.
• A safe lifting height is 20U.
• To minimize weight for an unpacked or rack-mounted enclosure, you can optionally remove the
rear panel CRU modules and the top-loaded CRU modules (accessed from beneath the
enclosure's top lids) before moving the enclosure once it is unpacked. However; CRU removal is
not required. If you remove an item—reinstall it into the same module slot from which it was
removed—after moving the enclosure. The Disk Enclosure ships with CRUs installed; however,
the disks must be installed as part of the system setup, afterthe enclosure is securely mounted
in the rack.
– Before installing the enclosure into a rack, see the Installing Disk Enclosure warning
– After installing the enclosure, and beforeinstalling the disks, see "ESD precautions" on page
55.
– To install disk drive modules into a rack-mounted enclosure, face the front panel, and pull the
enclosure outward onits rails. Remove the top lid(s) to provide access to the disk module
slots. See Figure 9 on page 11 for removable lids, see Figure 10 on page 11 and Figure 11
on page 12 for disk slots and CRU module slot indexing.
• Belt straps and optional lift handles are designed to support the weight of the enclosure as
shipped. They are not designed to support a fully populated enclosure. See also "Unpacking the
Disk Enclosure" on page 27
CAUTION: Use a suitable mechanical lift for hoisting the enclosure for installation into the rack:
• Fully configured COS Medium / Large Disk Enclosures can weigh up to 145.6 kg (321 lb). Do not
install disks until after the enclosure is secured into the rack.
• When positioning the enclosure into its rack space, use the optional enclosure lift handles (two
handles per side). See also "Requirements for rackmount installation" on page 29 for addition
information.
• Observe the lifting hazard label affixed to the storage enclosure.
• Avoid use of a vacuum lift because it can potentially damage the Disk Enclosure.

Operation

Important: Operation of the enclosure with any CRU modules missing will disrupt the airflow, and the
enclosure will not receive sufficient cooling. It is essential that all CRU slots hold modules before the
enclosure system is used.
• Observe the module bay caution label affixed to the module being replaced.
• Replace a defective CRU with a fully operational CRU as soon as possible. Do not remove a defective
CRU module unless you have a replacement model of the correct type ready for insertion.
• Before removal/replacement of a PSU, disconnect supply power from the PSU to be replaced. Refer to
"Replacing a PSU module" on page 56
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