Ds5020 Storage Subsystem Front View - IBM Midrange System DS4000 Series Hardware Manual

There are no serviceable parts in an E-DDM CRU. If it fails, it must be replaced in its entirety
(E-DDM, ATA translator card, bezel, and tray). The DS5020 drive tray is not interchangeable
with the drive tray of other DS4000 storage subsystems, such as DS4100 or DS4300 storage
subsystems. The DS5020 E-DDM option CRUs are not interchangeable with those of the
DS4200 Express and EXP420. When replacing an E-DDM CRU, be sure to order and install
the correct E-DDM CRU. Using non-supported E-DDM options or FRUs will result in the
E-DDM being locked out by the DS5020 controller firmware and might also damage the drive
connector in the enclosure midplane.
The following precautions must be taken while replacing the E-DDM CRU.
After you remove an E-DDM CRU, wait 70 seconds before replacing or reseating the
E-DDM CRU to allow it to properly spin down. Failure to do so might cause undesired
events.
Never hot-swap an E-DDM CRU when its associated green Activity LED is flashing.
Hot-swap an E-DDM CRU only when its associated amber Fault LED lights is not flashing
or when the E-DDM is inactive and its associated green Activity LED lights is not flashing.
If the E-DDM you want to remove is not in a failed or bypass state, always use the Storage
Manager client program either to place it in a failed state or to place the array that is
associated with the E-DDM (or E-DDMs) in an offline state before you remove it from the
enclosure.
The IBM System Storage DS5020 storage subsystem (Machine Type 1814-20A) supports
RAID levels 0, 1, 3, 5, and 6 up to over 67.2 TB when using 600 GB Fibre Channel hard
drives and up to 112 TB when using 1 TB Serial Advanced Technology Attachment (SATA)
Enhanced Disk Drive Modules (E-DDMs).
The DS5020 supports configurations of FC disks with or without Full Disk Encryption (FDE),
or SATA disks, or a mix of disk drives. To install FDE disks in a DS5020, you must purchase
the Full Disk Encryption option.

3.5.3 DS5020 Storage Subsystem front view

Figure 3-50 shows the DS5020 from the front side.
Figure 3-50 DS5020 storage subsystem front view
The hot-swap features of the DS5020 enable you to remove and replace the hard disk drives
without turning off the storage expansion enclosure. You can maintain the availability of your
system while a hot-swap device is removed, installed, or replaced.
The DS5020 Express supports up to 16 disk drive modules (DDMs). Each drive bay also
provides dual paths to each drive for path redundancy. The drives are customer replacement
units (CRUs).
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IBM Midrange System Storage Hardware Guide