What is a logical storage unit in a database can anyone help me in a better

what is a logical storage unit in a database can anyone help me in a better
Thank u

Do you have something specific in your mind? Do you want to clarify something you did not understand in the documentation? If so please provide the document you are reading.
For example, a tablespace is a logical storage unit where datafiles are physical files. Did you read the concepts manual?

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    Sun Aug 12 15:30:08 2012
    panic(cpu 1 caller 0xffffff802dab7b95): Kernel trap at 0xffffff7fafb87ad7, type 13=general protection, registers:
    CR0: 0x000000008001003b, CR2: 0xffffff8035ffd000, CR3: 0x00000000301e7000, CR4: 0x00000000000606e0
    RAX: 0xbbb77b426eb70009, RBX: 0xffffff803efb3008, RCX: 0x7fffffffffffffff, RDX: 0x0000000000000040
    RSP: 0xffffff8035f8bfa0, RBP: 0xffffff8035f8bfb0, RSI: 0x0000000000000002, RDI: 0xdeadbeefdeadbeef
    R8:  0xffffff80a7975078, R9:  0x7ffffffffffffffe, R10: 0x00000000ffffffff, R11: 0xffffff7fafb52ec0
    R12: 0xffffff80a7975000, R13: 0x0000000000000000, R14: 0x0000000000000000, R15: 0xffffff803d99baa0
    RFL: 0x0000000000010282, RIP: 0xffffff7fafb87ad7, CS:  0x0000000000000008, SS:  0x0000000000000010
    Fault CR2: 0xffffff8035ffd000, Error code: 0x0000000000000000, Fault CPU: 0x1
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    0xffffff8035f8bc40 : 0xffffff802da1d5f6
    0xffffff8035f8bcb0 : 0xffffff802dab7b95
    0xffffff8035f8be80 : 0xffffff802dace4ad
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    0xffffff8035f8bfb0 : 0xffffff802dab2677
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             com.digidesign.fwfamily.driver(8.0.3f1)[BEB533F9-2D70-291F-A586-3A9C65E1BB71]@0 xffffff7fafb79000->0xffffff7fafb9afff
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                dependency: com.apple.iokit.IOAudioFamily(1.8.9fc9)[FCB6B5D9-28D3-37BB-917C-F77C3B2CF2F8]@0 xffffff7fafb4b000
                dependency: com.apple.iokit.IOFireWireFamily(4.5.5)[A045A111-194F-3E54-A63E-E015DC69B862]@0 xffffff7fae0d0000
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    Darwin Kernel Version 12.0.0: Sun Jun 24 23:00:16 PDT 2012; root:xnu-2050.7.9~1/RELEASE_X86_64
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    com.paceap.kext.pacesupport.snowleopard          5.7.2
    com.digidesign.fwfamily.driver          8.0.3f1
    com.digidesign.iokit.DigiIO          8.0.3f1
    com.digidesign.iokit.DigiDal          8.0.3f1
    com.apple.filesystems.smbfs          1.8
    com.apple.driver.AppleHWSensor          1.9.5d0
    com.apple.driver.AudioAUUC          1.60
    com.apple.driver.AppleMikeyHIDDriver          122
    com.apple.driver.AppleHDA          2.3.0f2
    com.apple.driver.AGPM          100.12.69
    com.apple.driver.AppleMikeyDriver          2.3.0f2
    com.apple.driver.AppleBluetoothMultitouch          75.15
    com.apple.filesystems.autofs          3.0
    com.apple.iokit.IOBluetoothSerialManager          4.0.9f8
    com.apple.driver.AppleUpstreamUserClient          3.5.10
    com.apple.kext.AMDFramebuffer          8.0.0
    com.apple.AMDRadeonAccelerator          1.0.0
    com.apple.driver.AppleSMCPDRC          1.0.0
    com.apple.iokit.BroadcomBluetoothHCIControllerUSBTransport          4.0.9f8
    com.apple.driver.AppleBacklight          170.2.3
    com.apple.driver.AppleMCCSControl          1.0.33
    com.apple.driver.ACPI_SMC_PlatformPlugin          1.0.0
    com.apple.driver.AppleSMCLMU          2.0.2d0
    com.apple.iokit.IOUserEthernet          1.0.0d1
    com.apple.Dont_Steal_Mac_OS_X          7.0.0
    com.apple.driver.ApplePolicyControl          3.2.6
    com.apple.driver.AppleIntelHD3000Graphics          8.0.0
    com.apple.driver.AppleLPC          1.6.0
    com.apple.driver.AppleIntelSNBGraphicsFB          8.0.0
    com.apple.iokit.SCSITaskUserClient          3.5.1
    com.apple.driver.AppleUSBCardReader          3.1.0
    com.apple.driver.AppleIRController          320.15
    com.apple.AppleFSCompression.AppleFSCompressionTypeDataless          1.0.0d1
    com.apple.AppleFSCompression.AppleFSCompressionTypeZlib          1.0.0d1
    com.apple.BootCache          34
    com.apple.driver.XsanFilter          404
    com.apple.iokit.IOAHCIBlockStorage          2.2.0
    com.apple.iokit.AppleBCM5701Ethernet          3.2.5b3
    com.apple.driver.AppleUSBHub          5.1.6
    com.apple.driver.AppleFWOHCI          4.9.5
    com.apple.driver.AirPort.Atheros40          600.70.23
    com.apple.driver.AppleAHCIPort          2.4.0
    com.apple.driver.AppleUSBEHCI          5.1.5
    com.apple.driver.AppleEFINVRAM          1.6.1
    com.apple.driver.AppleRTC          1.5
    com.apple.driver.AppleACPIButtons          1.6
    com.apple.driver.AppleHPET          1.7
    com.apple.driver.AppleSMBIOS          1.9
    com.apple.driver.AppleACPIEC          1.6
    com.apple.driver.AppleAPIC          1.6
    com.apple.driver.AppleIntelCPUPowerManagementClient          196.0.0
    com.apple.nke.applicationfirewall          4.0.39
    com.apple.security.quarantine          2
    com.apple.driver.AppleIntelCPUPowerManagement          196.0.0
    com.apple.driver.DspFuncLib          2.3.0f2
    com.apple.iokit.IOAudioFamily          1.8.9fc9
    com.apple.kext.OSvKernDSPLib          1.6
    com.apple.iokit.IOFireWireAVC          4.2.2
    com.apple.driver.IOBluetoothHIDDriver          4.0.9f8
    com.apple.driver.AppleMultitouchDriver          235.27
    com.apple.kext.triggers          1.0
    com.apple.iokit.IOSerialFamily          10.0.6
    com.apple.iokit.IOAcceleratorFamily          19.0.26
    com.apple.iokit.AppleBluetoothHCIControllerUSBTransport          4.0.9f8
    com.apple.kext.AMD6000Controller          8.0.0
    com.apple.kext.AMDSupport          8.0.0
    com.apple.driver.AppleBacklightExpert          1.0.4
    com.apple.iokit.IOFireWireIP          2.2.5
    com.apple.driver.IOPlatformPluginLegacy          1.0.0
    com.apple.iokit.IOSurface          86.0.2
    com.apple.iokit.IOBluetoothFamily          4.0.9f8
    com.apple.driver.AppleGraphicsControl          3.2.6
    com.apple.driver.AppleThunderboltEDMSink          1.1.8
    com.apple.driver.AppleThunderboltEDMSource          1.1.8
    com.apple.driver.AppleSMBusController          1.0.10d0
    com.apple.driver.AppleSMBusPCI          1.0.10d0
    com.apple.driver.AppleSMC          3.1.3d11
    com.apple.driver.AppleHDAController          2.3.0f2
    com.apple.iokit.IOHDAFamily          2.3.0f2
    com.apple.iokit.IONDRVSupport          2.3.4
    com.apple.driver.IOPlatformPluginFamily          5.2.0d16
    com.apple.iokit.IOGraphicsFamily          2.3.4
    com.apple.driver.AppleUSBHIDKeyboard          165.5
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    com.apple.driver.AppleThunderboltDPOutAdapter          1.8.5
    com.apple.driver.AppleThunderboltDPInAdapter          1.8.5
    com.apple.driver.AppleThunderboltDPAdapterFamily          1.8.5
    com.apple.driver.AppleThunderboltPCIDownAdapter          1.2.5
    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.IOSCSIBlockCommandsDevice          3.5.1
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    com.apple.driver.AppleThunderboltNHI          1.6.0
    com.apple.iokit.IOThunderboltFamily          2.0.3
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    ~~~~~~~~~~~~~
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