Before you replace a drive, review the requirements and considerations.

Shelf types

You can replace a drive in a 24-drive shelf, in a 60-drive shelf, or in a drive drawer.

This procedure applies to IOM12 and IOM12B drive shelves, and DCM and DCM2 drive shelves.

This procedure is for like-for-like shelf IOM hot-swaps or replacements. This means you can only replace an IOM12 module with another IOM12 module or replace an IOM12B module with another IOM12B module. (Your shelf can have two IOM12 modules or have two IOM12B modules.)

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).

Drive numbering in a DE6000H (2U24) controller shelf or DE240S drive shelf

28 dwg e2824 de224c drive numbering maint e5700

60-drive shelves

Both the DE6000H (4U60) controller shelf and the DE240S drive shelf consist of five drive drawers that each contain 12 drive slots. Drive drawer 1 is at the top, and drive drawer 5 is at the bottom.

28 dwg e2860 de460c front no callouts maint e5700

For both a DE6000H (4U60) controller shelf drawer and a DE240S drive shelf drawer, drives are numbered from 0 to 11 in each drive drawer within the shelf.

dwg trafford drawer with hdds callouts maint e5700

Drive drawer

You can replace a drive drawer in a DE6000H (4U60) controller shelf and a DE240S drive shelf. Each of these 60-drive shelves has five drive drawers.

28 dwg e2860 de460c front no callouts maint e5700

Each of the five drawers can hold up to 12 drives.

92 dwg de6600 drawer with hdds no callouts maint e5700

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.