NEC Storage M100 Series User Manual page 60

User Guide
1.3.2.2 Notes on Turning Off the AC Power
1. Backing up user data
If the power of this disk array system is turned off without going through the power off procedure
described in
without using DC buttons section described in
the user data on caches will be backed up on the flash memory of the unit.
Data will not be lost even if the power is turned off without going through the procedures.
2. Notes on using the data replication function
The update information (= storage system information) managed by the data replication function
(DynamicDataReplication or RemoteDataReplication) is created on a replication reserved volume
or the cache memory.
If no replication reserved volume has been created, the update information mentioned above is
created only on the cache memory. In these circumstances, even if the disk array system is
powered off according to the procedure described in
System", the status of the disk array system becomes backup status when the disk array system is
stopped. If the backup fails, the storage system information is lost and the status of the disk array
system becomes one of the following six statuses.
Activity
Separate
Replicate
Restore
Release 6.0
Section 1.3.2: "Powering Off the Disk Array
Synchronization
Separated
Separating
Replicating
Synchronized
Restoring
Synchronized
System", or the power control systems
Section 1.3.1: "Powering On the Disk Array System",
Section 1.3.2: "Powering Off the Disk Array
Pair Status
All spaces are different. There is no change in
the status.
The status becomes fault, where copying is
stopped.
All spaces are different. Replication is
automatically restarted from the beginning.
There is no change in the status.
The status becomes fault, where copying is
stopped.
All spaces are different. Replication is
automatically restarted from the beginning.
There is no change in the status.
60
Chapter 1 Overview