12-Drive Or 24-Drive Shelves; Drive Numbering In A 12-Drive Controller Shelf Or Drive Shelf; Drive Numbering In A 24-Drive Controller Shelf Or Drive Shelf; Requirements For Handling Drives - Lenovo ThinkSystem DE Series Hardware Installation And Maintenance Manual

12-drive or 24-drive shelves

The figures show how the drives are numbered in each type of shelf (the shelf's front bezel or end caps have
been removed). Your system might look slightly different from the following figures.

Drive numbering in a 12-drive controller shelf or drive shelf

Drive numbering in a 24-drive controller shelf or drive shelf

Requirements for handling drives

The drives in your storage array are fragile. Improper drive handling is a leading cause of drive failure.
Follow these rules to avoid damaging the drives in your storage array:
• Prevent electrostatic discharge (ESD):
– Keep the drive in the ESD bag until you are ready to install it.
– Do not insert a metal tool or knife into the ESD bag. Open the ESD bag by hand or cut the top off with a
pair of scissors.
– Keep the ESD bag and any packing materials in case you must return a drive later.
– Always wear an ESD wrist strap grounded to an unpainted surface on your storage enclosure chassis.
If a wrist strap is unavailable, touch an unpainted surface on your storage enclosure chassis before
handling the drive.
• Handle drives carefully:
– Always use two hands when removing, installing, or carrying a drive.
– Never force a drive into a shelf, and use gentle, firm pressure to completely engage the drive latch.
– Place drives on cushioned surfaces, and never stack drives on top of each other.
– Do not bump drives against other surfaces.
– Before removing a drive from a shelf, unlatch the handle and wait 30 seconds for the drive to spin
down.
– Always use approved packaging when shipping drives.
• Avoid magnetic fields:
– Keep drives away from magnetic devices. Magnetic fields can destroy all data on the drive and cause
irreparable damage to the drive circuitry.
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Chapter 3 Hardware replacement procedures
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