IBM DS3500

Table 3. DS3524 storage subsystem and EXP3524 expansion enclosure weights
Model Maximum
1
Empty
2
DS3524 25.9 kg (57.2 lb)
10.7 kg (23.6 lb)
EXP3524 25.2 kg (55.5 lb)
1
Chassis with dual controller or ESMs and 24 hard disk drives.
2
Chassis without power supplies, controllers or ESMs, and hard disk drive filler panels.
Table 4. DS3500 component weights
Unit Weight
2.5–inch hard disk drive 0.25 kg (0.55 lb)
3.5–inch hard disk drive 0.78 kg (1.72 lb)
Power supply with fan 2.50 kg (5.31 lb)
Controller (including cache battery backup
and no host port adapter)
2.05 kg (4.52 lb)
Fibre channel host daughter card .08 kg (.18 lb)
iSCSI host daughter card .05 kg (.11 lb)
SAS host daughter card .07 kg (.15 lb)
Battery .15 kg (.33 lb)
ESM 1.75 kg (3.86 lb)
Temperature and humidity
Table 1 on page 4 lists the acceptable temperature and humidity ranges in which
the storage subsystem is designed to operate.
Notes:
1. The non-operating environment must not exceed the environment limits for
longer than 60 days.
2. The storage environment must not exceed the environment limits for longer than
1 year.
3. Substantial deviations from the suggested operating range, in either direction, if
sustained for extended periods of time, will expose the unit to greater risk of
failure from external causes.
Electrical requirements
Consider the following information when you prepare the installation site:
v Protective ground: Site wiring must include a protective ground connection to
the ac power source.
Note: Protective ground is also known as safety ground or chassis ground.
v Circuit overloading: Power circuits and associated circuit breakers must provide
sufficient power and overload protection. To prevent possible damage to the unit,
isolate its power source from large switching loads (such as air conditioning
motors, elevator motors, and factory loads).
v Power failures: If a total power failure occurs, the unit automatically performs a
power-on recovery sequence without operator intervention after power is
restored.
14 System Storage DS3500 and EXP3500: Installation, User’s, and Maintenance Guide