Hitachi VSP User and Reference Guide
2–30
Functional and Operational Characteristics
721 Open and
Mainframe
When a parity group is uninsulated or installed, the
following operation is performed according to the
setting of mode 721.
Mode 721 = ON:
When a parity group is uninstalled or installed, the
LED of the drive for uninstallation is not illuminated,
and the instruction message for removing the drive
does not appear. Also, the windows other than that
of parity group, such as DKA or DKU, are
unavailable to select.
Mode 721 = OFF (default):
When a parity group is uninstalled or installed, the
operation is as before: the LED of the drive is
illuminated, and the drive must be unmounted and
remounted.
Notes:
1. When the RAID level or emulation type is
changed for the existing parity group, this
option should be applied only if the drive
mounted position remains the same at the time
of the parity group uninstallation or installation.
2. After the operation using this option is
completed, the mode must be set back to OFF;
otherwise, the LED of the drive to be removed
will not be illuminated at subsequent parity
group uninstalling operations.
OFF .
Mode Category Description Default MCU/RCU
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