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10.3 Hot System Replacement
Be sure to install an UltraSCSI differential terminator plug to the SCSI OUT connector.
CAUTION
Do not set the AC main line switch to OFF, nor disconnect the
power cable or RCI cable while the GP7000F main cabinet is
powered on, unless absolutely necessary. Otherwise, the data in
the disk units may be destroyed.
10.3 Hot System Replacement
Disk unit The SCA-II connector is used as the disk unit connector to enable hot system replacement of a
faulty disk unit. The availability is improved by combining this feature with the disk mirroring
features. Two LEDs (ACTIVE and FAULT) are installed per disk unit to indicate the disk unit
status. These LEDs operate as described below.
Table 10.2 LEDs
Name Color Status
ACTIVE LED Green Lights up when the SCSI commands are executed.
FAULT LED Amber Lights up when the hot replacement command is executed.
To hot-swap a disk unit, you need to use the software tool which is provided in "Basic Software
Extension" or "Enhanced Support Facility". Please refer to user’s guide of "Basic Software
Extension" or "Enhanced Support Facility" for more information. The FAULT LED lights up
according to the procedures described in the user’s guide to identify the failed disk unit. If the
FAULT LED does not lights up even if you follows the procedures described in the user’s guide,
hot-swapping is not possible. In this case, power-off the entire system, then replace the disk unit.
When adding a new disk unit while the system is running, use the software tool, as well.
Power When the power supply units are configured redundantly, it can be hot-swapped. Each power supply
unit has a POWER LED on it, and it lights steadily while the corresponding power supply is
working. When the POWER LED doesn’t light, it indicates that the power is turned off or the power
unit has failed. Hot replacement of the power supply unit is possible only while the corresponding
POWER LED is off.
Use a software tool, which is provided in "Basic Software Extension" or "Enhanced Support
Facility", to how-swap a power supply unit. Please refer to user’s guide of "Basic Software
Extension" or "Enhanced Support Facility" for more information.
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