Proware EP-4604D-G1S3, User Manual

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iSCSI GbE to SAS/SATA RAID Subsystem
144 User Manual
6.10.2 Ownership
When creating RG, it will be assigned with a prefered owner, the default owner is
controller 1. To change the RG ownership, please follow the procedures.
1. Select “/ Volume configuration / RAID group”.
2. Check the gray button next to the RG name; click “Set preferred owner”.
3. The ownership of the RG will be switched to the other controller.
The RG ownership is changed to the other controller.
6.10.3 Controller Status
There are four statuses described on the following. It can be found in “/ System
maintenance / System information”.
1. Normal: Dual controller mode. Both of controllers are functional.
2.
Degraded: Dual controller mode. When one controller fails or has been plugged out,
the system will turn to degraded. In this stage, I/O will force to write through for
protecting data and the ownership of RG will switch to good one. For example: if
controller 1 which owns the RG1 fails accidently, the ownership of RG1 will be
switched to controller 2 automatically. And the system and data can keep working
well. After controller 1 is fixed or replaced, The current owner of all RGs will be
asigned back to their prefered owner.
3.
Lockdown: Dual controller mode. The firmware of two controllers is different or the
size of memory of two controllers is different. In this stage, only master controller
can work and I/O will force to write through for protecting data.