Ds3500 Storage Subsystem And Exp3500 Expansion Enclosure Components - IBM DS3500 Installation, User & Maintenance Manual

v Make sure that the storage subsystem is in an optimal state before you shut it
v Back up the data on your storage drives periodically.
v To maintain power redundancy, connect the DS3500 storage subsystem and
v Before any planned system shutdown or after any system additions, removals, or
v During any maintenance or attended power-on procedure, carefully follow the
v The storage subsystem supports simultaneous power-on to the system
v A storage subsystem in an optimal state should recover automatically from an
DS3500 storage subsystem and EXP3500 expansion enclosure
components
The DS3500 storage subsystem and EXP3500 expansion enclosure have the
following removable components. These components, called customer replaceable
units (CRUs), are accessible from the front or rear of the storage subsystem.
v (DS3512 and EXP3512) Up to 12 LFF 3.5–inch 6 Gbps SAS or NL SAS hard
v (DS3524 and EXP3524) Up to 24 SFF 2.5–inch 6 Gbps SAS or NL SAS hard
6
System Storage DS3500 and EXP3500: Installation, User's, and Maintenance Guide
down. Never turn off the power if any amber LED is lit; be sure to resolve any
error conditions before you shut down the storage subsystem.
EXP3500 expansion enclosure right and left power supplies to two independent
external power circuits through ac power distribution units (PDUs) inside a rack
or directly into external receptacles. This ensures that all devices in the
configuration have power in the event that only one power circuit is available. In
addition, having all the right or all the left power cables connected to the same
power circuit enables the devices in the configuration to power-on simultaneously
during an unattended restoration of power.
Note: Do not overload the circuits that power your storage subsystem and
expansion enclosures. Use additional pairs of ac PDUs. See Table 1 on
page 4 for information about storage subsystem power requirements.
Contact your technical-support representative for additional information.
modifications (including firmware updates, logical drive creations, storage
partitioning definitions, hardware changes, and so on), save the storage
subsystem profile as explained in the DS Storage Manager 10 Installation and
Host Support Guide for your operating system. Save the profile in a location
other than in the logical drives that are created for the DS3500 storage
subsystem and EXP3500 expansion enclosure.
power-on sequence that is described in "Turning on the storage subsystem" on
page 68. Make sure that each component of the storage subsystem is
powered-on in the correct order during this entire power-on procedure to make
sure that the controller will be able to optimally access all of the storage
subsystems.
components; however, you should always follow the power-on sequence that is
described in "Turning on the storage subsystem" on page 68 during any attended
power-on procedure.
unexpected shutdown and unattended simultaneous restoration of power to
system components. After power is restored, call your IBM technical-support
representative if any of the following conditions occur:
– The storage subsystem logical drives and subsystems are not displayed in the
DS Storage Manager graphical user interface.
– The storage subsystem logical drives and subsystems do not come online.
– The storage subsystem logical drives and subsystems seem to be degraded.
disk drives and drive filler panels.
disk drives and drive filler panels.