Workstation User’s Manual
358 VMware, Inc.
Thisisimportantwithdatastoragedevices(aZipdrive,forexample).Ifyoumovea
datastoragedevicetoosoonaftersavingafileandtheoperatingsystemdidnot
actuallywritethedatatothedisk,youcanlosedata.
Use Smart Cards with Virtual Machines
Asmartcardisaplasticcardaboutthesizeofacreditcardbutembeddedwitha
computerchip.Manygovernmentagenciesandlargeenterprisesusesmartcardsto
sendsecurecommunication,digitallysigndocuments,andauthenticateuserswho
accesstheircomputernetworks.Usersplugasmartcardreaderintotheirco
mputer
andinserttheirsmartcardinthereader.TheyarethenpromptedfortheirPINtologon.
ThevirtualmachineconsiderssmartcardreaderstobeatypeofUSBdevice.Youcan
chooseVM>RemovableDevicestoaccessthem.Virtualmachinescanconnectto
smartcardre
adersthatinterfacetoserialports,parallelports,USBports,PCMCIA
slots,andPCIslots.
Asmartcardcanbesharedbetweenvirtualmachinesorbetweenthehostandoneor
morevirtualmachines.Sharingisenabledbydefault.Todisablesharing,see“Disable
SmartCardSharing”onpage 360.
Whenyouplugasmartcardreaderintothecom
puterthereaderappearsastwo
separateUSBdevicesintheWorkstationinterface.Thisisbecauseyoucanusesmart
cardsinoneoftwomutuallyexclusivemodes:virtualmodeorUSBpassthroughmode.
Youmustselectoneortheother.
Virtualmode(Recommended)–Thesmartcardreaderdeviceisavailableas
Virtual<smart_card_reader_model>underRemovableDevices.Afterthe
virtualreaderisconnectedtothevirtualmachine,itisvisibleasUSBSmartCard
ReaderonWindowsXPguests.OnWindowsVistaandWindows7gueststhe
genericsmartcardreaderde
vicenameappearsun
dertheWindowsDevice
Managerlist.Invirtualmode,thesmartcardreadercanbesharedamong
applicationsonthehostandamongapplicationswithindifferentguestsonthe
host.
USBpassthroughmode–Thesmartcardreaderdeviceisavailableas
<smart_card_reader_model>underRemovableDevices.InUSBpassthrough
mode,asinglevirtualmachinedirectlycontrolsthephysicalsmartcardreader.A
USBpassthroughsmartcardreadercannotbeusedbyapplicationsonthehostor
byapplicationswithinothervirtualmach
ines.Yo
ushoulduseUSBpassthrough
modeonlyifconnectioninvirtualmodedoesnotworkwellforyourscenario.If
youareusingtheUSBpassthroughmodeyoumayneedtoinstallthedriver
providedbythemanufacturer.
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