Solution
Product and version information:
VTL6000 V100R003C02
VTL6900 V100R005
The procedures for powering off and powering on the VTL6000 and VTL6900 are as follows:
Power-off procedure: stopping services, powering off VEs, powering off SEs, powering off the SUC-SUD subsystem, powering off Fibre Channel switches, and disconnecting from the external power supply
Power-on procedure: connecting to the external power supply, powering on Fibre Channel switches, powering on the SUC-SUD subsystem, powering on VEs, and powering on SEs.