NEC S2900 User Manual

Contents

NEC S2900 User Manual Manual pdf 90 page image

73The host system cannot recognize the disk array unit.Cause CountermeasuresThe FC cable is not connected correctly. Connect the FC cable correctly according to Chapter5 "Connection of Disk Array Unit".After turning on the power switch of thehost system or FC-AL switch, the powerof the disk array unit is turned on.See Section 7.2 "Power On/Off of Disk Array Unit".Each AL-PA must be unique. The sameAL-PA is specified in duplicate.Set an AL-PA different from the AL-PAs of other FCdevices in the loopaccording to Chapter 5"Connection of Disk Array Unit".The setting of a host bus adapter orFC-AL switch is incorrect.Set the switches correctly according to the User'sGuide of the host bus adapter or FC-AL switch, thehost system, and/or additionally installed peripherals.The used host bus adapter is unavailablefor the disk array unit.Use the host bus adapter available for the disk arrayunit. Contact your sales representative if unknown.The disk array unit is installed in an areain which it easily suffers vibration and/orshocks.Install the disk array unit referring to Chapter 1"Notes on Installation and Handling of Disk ArrayUnit".The power is turned off or the resetbutton on the host system is pressed withthe ACCESS LED (green) being on.Contact your service representative.The logical disk of the disk array unit isnot assigned.Assign the logical disk number appropriately usingthe " NEC Storage Manager software" or contactyour service representative.8.2 Computer VirusA computer virus is a program that is intentionally designed to cause damage to a third party'sprograms or databasesThe program can replicate itself or use another system function to infect other systems by copyingitself into other programs. The appearance of symptoms of virus infection can be delayed by havingthe system wait for a specific point in time, a specific period of time, or a specific number oftransaction executions. The virus may destroy programs, data, or other files or causes systems tooperate in a way not intended by the designers.To suppress the risk of damage to a minimum level, take proper measures such as a regularlyscheduled backup of important data.