Acer HDS AMS200 Reference Manual page 314

Note 2: Although the subsystem with a configuration of RAID6, RAID 5, RAID 1, or RAID 1+0
provides data reliability enhanced by means of redundancy, a possibility remains that user
data is lost owing to an unexpected failure of a host computer or hardware/software of the
subsystem itself. Therefore, users are requested to back up all data for restoration in case
where the original data is lost.
RAID 0+1 is described in place of RAID 1+0 in some places, however, it has the same meaning
as RAID 1+0.
Note 3: Value of maximum configuration (in the case where all the mountable Disk drives
and Controller are mounted).
Note 4: Power requirement in the case of the maximum configuration is shown. When
planning facilities such as the uninterrupted power supply (UPS), specify the power factor as
100% for calculation. Value at 100 V/200 V is shown.
(Example: 300 W=300 VA)
The actual required power may exceed the value shown in the table when the tolerance is
included.
Note 5: Power current of N×2 described in this table is required for operation by a single
power supply unit.
Note 6: When one of the two power supply units fails, another power supply unit requires
electric current for the two power supply units. Therefore, plan the power supply facility in
which the current carrying capacity of one of the power supply units is a total capacity of
the two power supply units.
Note 7: A noise emitted at the time of start is not included.
Note 8: The start-up time may be longer than three minutes depending on the configuration.
Note 9: It is recommended that the RAID level is configured within 6D+1P.
294 Appendix C Basic Specifications of the Subsystem