Dell PowerVault 251F Dell PowerVault 65xF Storage System — Informatio - Page 3

53WHHbk1.book Page 1 Tuesday, March 14, 2000 5:47 PM This document updates the installation and service guides for Dell PowerVault 65xF storage systems. The information contained in this update explains the correct procedure for turning off power to the PowerVault 65xF 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 65xF 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