Dell PowerVault 650F Information Update page 3

53WHHbk1.book Page 1 Tuesday, March 14, 2000 5:47 PM
This document updates the installation and service guides for Dell PowerVault 65 x F
storage systems. The information contained in this update explains the correct proce-
dure for turning off power to the PowerVault 65 x F Fibre Channel disk array processor
enclosure (DPE) and supersedes the information contained in the installation and
service guides.
If a DPE is improperly turned off, you cannot save write cache data to the vault drives
and a "cache dirty" condition can occur. When that happens, logical unit numbers
(LUN) become inaccessible and the unsolicited event log displays a message such as:
In addition, Dell OpenManage™ Data Supervisor and Dell OpenManage Data
Administrator shows that the inaccessible LUN is unowned. The LUN may need to be
unbound and rebound. For more information, refer to your Dell PowerVault 65 x F
storage system documentation.
To turn off power correctly, stop any input/output (I/O) activity to the array, then turn
off AC power to the array as explained in the following section, "Turning Off a DPE."
support.dell.com Dell PowerVault 65xF Storage System Information Update 1-1