NEC Storage M100 Series - Table 1-12: about Control Systems

Release 6.0 57
User Guide Chapter 1 Overview
3. When the snapshot function is used
If the snapshot function is used, updated information is copied from disk drives to the cache
memory when the disk array unit is started.
Because of this, the disk array unit’s start up time is delayed by 10 seconds per 1 TB of the updated
information.
1.3.1.4 Power control systems without using power switches
1. Control Systems
Table 1-12: About Control Systems describes power control systems that do not use power
switches.
Control systems described here are supported only in the M300 series.
Table 1-12: About Control Systems
Control system Host OS Feature
ESMPRO/AC
(Works together with UPS)
Windows
Linux
This control system uses a server for power
control, which can be associated with hosts.
For details, see ESMPRO/AC manual.
ESMPRO/AC
(Automatic operation)
Windows
Linux
This control system uses a server for power
control and allows for automatic operation.
For details, see ESMPRO/AC manual.
UPS
(Does not work with UPS)
Not specified
This control system is for instantaneous power
interruption.
Because there is no association, when the
retention period of UPS elapses, temporary
power-off followed by reboot takes place.
Cached data, however, is protected.
Association is a mechanism to notify the disk array system of interruption of power
supply to the UPS and to start shutdown.
 If you use the UPS control system, establish redundancy by providing a UPS for
each power supply of a device.
 Make sure that a failure of a single UPS does not cause simultaneous power failure
of PS0 and PS1.