IBM DCS3860, Инструкция по установке, использованию и обслуживанию

Страница: 26 / 204

Important: The installation order within each drive drawer is from left to right in
rows. Slots 1, 4, 7, and 10 must have a drive installed in these locations to ensure
that there is sufficient airflow to the drives (see Figure 3). To verify these slots,
consult the overlay on the front of each of the five drive drawers. Ensure that the
four drives in each row are next to each other. The long edge of each drive must
touch the drive next to it. To maintain uniform airflow across all drive drawers, the
storage expansion enclosure must be configured with a minimum of 20 drives,
with four drives in the front row of each of the five drive drawers.
Disk Drive Modules (DDMs)
The DCS3860 supports up to 60 DDMs in five drive drawers that are accessible
from the front of the storage expansion enclosure. The disk drawer system board
supports 6 Gbps SAS (Serial Attached SCSI) and Near-Line SAS interface.
Attention: The DCS3860 and EXP3800 DDMs and the EXP5060 SATA DDMs are
not compatible. Do not use the DCS3860 DDMs in an EXP5060 storage expansion
enclosures. Similarly, do not use the EXP5060 SATA DDMs in a DCS3860 enclosure.
There are no serviceable parts in a DDM FRU. If the DDM FRU fails, it must be
replaced. When replacing a DDM FRU, ensure that you order and install the
correct DDM FRU.
Attention:
1. After you remove a drive FRU, wait 90 seconds before replacing or reseating
the drive FRU to allow the drive to properly spin down. Failure to do so can
cause undesired events.
2. Never hot-swap a drive FRU when its green Activity LED is flashing. Hot-swap
a drive FRU only when its associated blue Service Action Allowed LED is lit
and the drive is inactive.
If the DDM you want to remove is not in a failed or bypass state, always use the
DS Storage Manager client program either to place the DDM in a failed state or to
place the array that is associated with the DDM (or DDMs) in an offline state
before you remove it from the enclosure.
Front-row
drives
Figure 3. DCS3860 drive drawer
8
IBM System Storage DCS3860 Storage System: Installation, User's, and Maintenance Guide