System information

43 of 114Release 7.0VNX™ System Operations
4. Use the SPS power switches to power off the storage system.
Wait two minutes to allow the storage system to write its cache to disk. Make sure that the
SPS power indicators are off before continuing. The storage system will power down
within 2 minutes.
CAUTION
!
Never unplug the power supplies to shut down an SPE. Bypassing the SPS in that
manner prevents the storage system from saving write cache data to the vault
drives, and results in data loss. You will lose access to data, and the storage
processor log displays an error message similar to the following:
Enclosure 0 Disk 5 0x90a (Can’t Assign - Cache Dirty)
0 0xafb40 0x14362c
Contact your service provider if this situation occurs.
5. Disconnect the power cables that run from the Standby Power Supplies to the DAE.
Note: This turns off the power to the SPS and the DAE. If the intent is to power off the
entire array, then shutdown each DAE as well.
This turns off power to the SPE and the first DAE (EA 0, bus 0). If the intent is to power off
the entire array, then shutdown each DAE as well.
6. If there are multiple DAEs, disconnect the power cables from each DAE to the PDP. This
powers down the DAEs..
Step Action
CIP-001115
SPS power
switch A
SPS power
switch B