User guide

B–18 System option modes
Hitachi Unified Storage VM Block Module Hardware User Guide
734 Dynamic
Provisioning
When exceeding the pool threshold, the SIM is reported
as follows:
Mode 734 = ON: The SIM is reported at the time when
exceeding the pool threshold. If the pool usage rate
continues to exceed the pool threshold, the SIM is
repeatedly reported every eight (8) hours. Once the pool
usage rate falls below the pool threshold, and then
exceeds again, the SIM is reported.
Mode 734 = OFF (default): The SIM is reported at the
time when exceeding the pool threshold. The SIM is not
reported while the pool usage rate continues to exceed
the pool threshold. Once the pool usage rate falls below
the pool threshold and then exceeds again, the SIM is
reported.
Notes:
1. This option is turned ON to prevent the write I/O
operation from being unavailable due to pool full.
2. If the exceeding pool threshold SIM occurs
frequently, other SIMs may not be reported.
3. Though turning on this option can increase the
warning effect, if measures such as adding a pool fail
to be done in time so that the pool becomes full,
MODE 729 can be used to prevent file systems from
being destroyed.
4. Turning on MODE 741 can provide the SIM report to
not only the users but also the service personnel.
OFF .
741 Dynamic
Provisioning
The option enables to switch over whether to report the
following SIM for users to the service personnel:
SIM-RC 625000 (DP pool usage rate continues to exceed
the threshold)
Mode 741 = ON: SIM is reported to the service personnel
Mode 741 = OFF (default): SIM is not reported to the
service personnel
Note:
1. This option is set to ON to have SIM for users
reported to the service personnel:
- For the system where SNMP and E-mail notification
are not set.
- If Storage Navigator is not periodically activated.
2. When MODE 734 is turned OFF, SIM-RC625000 is not
reported; accordingly the SIM is not reported to the
service personnel even though this option is ON.
OFF -
Mode Category Description Default
MCU/
RCU