Features Of Raid1 - Hitachi HF-W2000 58 Instruction Manual

10.1.2 Features of RAID1

The RAID1 installed in this equipment has the following features.
Hot swap
This equipment supports hot swap (replacement of an HDD with the power turned on), which makes it possible
to replace HDDs without stopping the system.
Rebuilding feature
This equipment can automatically or manually start rebuilding via the execution of a command after the
replacement of HDDs. This equipment 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 details about how to modify
these settings, see 5.3 RAID Configuration Control Command (raidctrl) (B Model Only) in the HF-W2000
Model 58/55/50 RAS FEATURES MANUAL (WIN-63-0098).
Data mismatch detection feature
When a data mismatch between HDDs might have occurred due to an unexpected power interruption or for
another reason, this equipment 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 details about how to modify this setting, see 5.3 RAID Configuration
Control Command (raidctrl) (B Model Only) in the HF-W2000 Model 58/55/50 RAS FEATURES MANUAL
(WIN-63-0098).
GUI features
This equipment can graphically display the HDD status of RAID1 by using the RAS software. For details about
how to use the RAS software, see 4.1 Hardware Status Window in the HF-W2000 Model 58/55/50 RAS
FEATURES MANUAL (WIN-63-0098).
Offline rebuilding feature
This equipment can rebuild RAID1 while the OS is deactivated through the use of 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