Functions Of Software Raid1 - Hitachi HF-W2000 Instruction Manual

10.1.2 Functions of software RAID1

The software RAID1 installed in this computer has the following functions.
<Hot swap>
This computer supports hot swap (replacement of HDD with power turned on), which
makes it possible to replace HDDs without stopping the system.
<Rebuilding function>
This computer can automatically start rebuilding or manually start rebuilding by executing
a command after replacement of HDDs. This computer can also change the load of writing
data to HDDs, which is applied to the system during rebuilding. These settings can be
modified by the RAS software. For how to modify settings, refer to "5.3 RAID
Configuration Control Command (raidctrl)" in the HF-W2000 Model 48/45 RAS Function
Manual (WIN-63-0092).
<Data mismatch detection function>
When a data mismatch between HDDs may have occurred due to unexpected power
interruption or other reason, this computer can be set to isolate or continue to operate the
HDD in drive bay 2. This setting can be modified by the RAS software. For how to modify
this setting, refer to "5.3 RAID Configuration Control Command (raidctrl)" in the HF-
W2000 Model 48/45 RAS Function Manual (WIN-63-0092).
<GUI function>
This computer can graphically display the HDD status of RAID1 by using the RAS
software. For how to use the RAS software, refer to "4.1 Hardware Status Window" in the
HF-W2000 Model 48/45 RAS Function Manual (WIN-63-0092).
<Offline rebuilding function>
This computer can rebuild RAID1 while the OS is deactivated by using a dedicated tool.
Because rebuilding is possible with the OS deactivated, the system can be recovered more
quickly than by rebuilding with the OS running.
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10. SOFTWARE RAID1