Ejecting a 2nd EHD from iMac when not in use

I have a 2TB WD EHD drive hooked up using Time Machine. I have a 2nd 1 TB WD EHD with a large vacation project. On the iMac the WD drives do not completely shut done when the iMac sleeps or is shut down. Since I am not currently working on the vacation project - I ejected the EHD. I guess I will find out when I reconnect it, but is there any problem doing this. I had excluded some files on the vacation EHD and they don't show now in options. I guess it would be wise to check when reconnecting if the exclusion shows up again. I just can't see the vacation drive remaining on when I'm not using it.

No, there's no problem. In fact it's a good idea. Firewire retains power on the bus even when the computer is shut down, so ejecting the drives and disconnecting will save energy.

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    0xffffff800aafb320 : 0xffffff8002443908
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    0xffffff800aafb450 : 0xffffff80024de395
    0xffffff800aafb500 : 0xffffff80024dd64b
    0xffffff800aafb530 : 0xffffff80024dd7f7
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    0xffffff800aafb5c0 : 0xffffff800272024c
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    0xffffff800aafb840 : 0xffffff800271936a
    0xffffff800aafb8c0 : 0xffffff80025137df
    0xffffff800aafb910 : 0xffffff8002509fe1
    0xffffff800aafb950 : 0xffffff800252685c
    0xffffff800aafba00 : 0xffffff8002526679
    0xffffff800aafba30 : 0xffffff8002712518
    0xffffff800aafbaa0 : 0xffffff8002511c46
    0xffffff800aafbae0 : 0xffffff800250936c
    0xffffff800aafbb90 : 0xffffff80024fbb49
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    Kernel text base: 0xffffff8002400000
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    vm objects:17562048
    vm object hash entri:2264400
    VM map entries:6216720
    pv_list:19034112
    vm pages:74043792
    kalloc.32:1826816
    kalloc.64:170766336
    kalloc.128:649785344
    kalloc.256:648183808
    kalloc.512:2285568
    kalloc.1024:2637824
    kalloc.4096:2387968
    kalloc.8192:3989504
    ipc ports:2168672
    threads:1166880
    vnodes:16507128
    namecache:6952320
    HFS node:21840864
    HFS fork:6352896
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    ubc_info zone:3559464
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    Kalloc.Large:12347186
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    com.seagate.driver.PowSecLeafDriver_10_5          5.2.2
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    com.apple.driver.AppleHDA          2.3.1f2
    com.apple.driver.AppleBluetoothMultitouch          75.15
    com.apple.driver.AppleHWSensor          1.9.5d0
    com.apple.iokit.IOUserEthernet          1.0.0d1
    com.apple.iokit.IOBluetoothSerialManager          4.0.9f33
    com.apple.Dont_Steal_Mac_OS_X          7.0.0
    com.apple.driver.AGPM          100.12.69
    com.apple.driver.AppleMikeyDriver          2.3.1f2
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    com.apple.iokit.BroadcomBluetoothHCIControllerUSBTransport          4.0.9f33
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    com.apple.driver.ACPI_SMC_PlatformPlugin          1.0.0
    com.apple.driver.AppleLPC          1.6.0
    com.apple.driver.AppleBacklight          170.2.3
    com.apple.driver.AppleUpstreamUserClient          3.5.10
    com.apple.driver.AppleMCCSControl          1.0.33
    com.apple.kext.AMDFramebuffer          8.0.0
    com.apple.ATIRadeonX2000          8.0.0
    com.apple.driver.AppleUSBCardReader          3.1.0
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    com.apple.AppleFSCompression.AppleFSCompressionTypeDataless          1.0.0d1
    com.apple.AppleFSCompression.AppleFSCompressionTypeZlib          1.0.0d1
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    com.apple.driver.XsanFilter          404
    com.apple.iokit.IOAHCIBlockStorage          2.2.2
    com.apple.driver.AppleUSBHub          5.2.5
    com.apple.driver.AppleFWOHCI          4.9.6
    com.apple.driver.AirPort.Atheros40          600.70.23
    com.apple.driver.AppleAHCIPort          2.4.1
    com.apple.nvenet          2.0.19
    com.apple.driver.AppleUSBEHCI          5.4.0
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    com.apple.driver.AppleEFINVRAM          1.6.1
    com.apple.driver.AppleRTC          1.5
    com.apple.driver.AppleHPET          1.7
    com.apple.driver.AppleACPIButtons          1.6
    com.apple.driver.AppleSMBIOS          1.9
    com.apple.driver.AppleACPIEC          1.6
    com.apple.driver.AppleAPIC          1.6
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    com.apple.nke.applicationfirewall          4.0.39
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    com.apple.driver.AppleIntelCPUPowerManagement          196.0.0
    com.apple.driver.AppleBluetoothHIDKeyboard          165.5
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    com.apple.driver.AppleMultitouchDriver          235.28
    com.apple.iokit.IOSurface          86.0.3
    com.apple.iokit.IOSerialFamily          10.0.6
    com.apple.iokit.IOBluetoothFamily          4.0.9f33
    com.apple.kext.triggers          1.0
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    com.apple.iokit.AppleBluetoothHCIControllerUSBTransport          4.0.9f33
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    com.apple.iokit.IOHDAFamily          2.3.1f2
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    com.apple.driver.IOPlatformPluginLegacy          1.0.0
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    com.apple.driver.AppleGraphicsControl          3.2.11
    com.apple.driver.AppleBacklightExpert          1.0.4
    com.apple.driver.AppleSMBusController          1.0.10d0
    com.apple.iokit.IONDRVSupport          2.3.5
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    com.apple.iokit.IOUSBHIDDriver          5.2.5
    com.apple.iokit.IOUSBMassStorageClass          3.5.0
    com.apple.driver.AppleUSBMergeNub          5.2.5
    com.apple.driver.AppleUSBComposite          5.2.5
    com.apple.iokit.IOSCSIMultimediaCommandsDevice          3.5.1
    com.apple.iokit.IOBDStorageFamily          1.7
    com.apple.iokit.IODVDStorageFamily          1.7.1
    com.apple.iokit.IOCDStorageFamily          1.7.1
    com.apple.iokit.IOFireWireSBP2          4.2.0
    com.apple.iokit.IOSCSIBlockCommandsDevice          3.5.1
    com.apple.iokit.IOAHCISerialATAPI          2.5.0
    com.apple.iokit.IOSCSIArchitectureModelFamily          3.5.1
    com.apple.iokit.IOUSBUserClient          5.2.5
    com.apple.iokit.IOFireWireFamily          4.5.5
    com.apple.iokit.IO80211Family          500.15
    com.apple.iokit.IOAHCIFamily          2.2.1
    com.apple.iokit.IONetworkingFamily          3.0
    com.apple.iokit.IOUSBFamily          5.4.0
    com.apple.driver.NVSMU          2.2.9
    com.apple.driver.AppleEFIRuntime          1.6.1
    com.apple.iokit.IOHIDFamily          1.8.0
    com.apple.iokit.IOSMBusFamily          1.1
    com.apple.security.sandbox          220
    com.apple.kext.AppleMatch          1.0.0d1
    com.apple.security.TMSafetyNet          7
    com.apple.driver.DiskImages          344
    com.apple.iokit.IOStorageFamily          1.8
    com.apple.driver.AppleKeyStore          28.21
    com.apple.driver.AppleACPIPlatform          1.6
    com.apple.iokit.IOPCIFamily          2.7.2
    com.apple.iokit.IOACPIFamily          1.4
    com.apple.kec.corecrypto          1.0

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