Time Machine drive showing much smaller amount of data than on internal HDD.

I am helping a friend that has an iMac running 10.7.5 with a TM backup drive. External HDD is formatted as Extended Journaled Case Sensitive.( Default via TM grabbing the disk initially and setting it up.)
Both internal HDD and TM HDD have been verified in Disk Utility. TM drive shows the size of the backups.backups folder as 11GB and the internal drive has 320GB of data on it. No items were excluded from the TM backup as an option. Running a backup to TM is successful with no error messages.
Disk Permissions were repaired on the internal HDD but it is not an option for the TM HDD ( grayed out in DU) .
I tried the tips from this thread:
https://discussions.apple.com/message/19018287#19018287
about unchecking the ownership in the Get Info window for the TM drive but the checkbox is not available. I went thru Terminal to enable ownership on the drive and it appeared successful but still no ability to Repair Disk Permissions in Disk Utility.
Pondini has had GREAT advice on all things TM!!!!! What a fantastic resource for us all! This is the only backup of the data at this point. The friend is also having issues with a large iPhoto Library and before I option & boot iPhoto to repair library permissions etc, I want to know the TM HDD is truly functioning correctly.
Any thoughts?

It has failed. It says it requires 318 GB of space, which is ludicrous.
Feb 1 17:02:25 koishi /System/Library/CoreServices/backupd[7799]: Backup requested by user
Feb 1 17:02:25 koishi /System/Library/CoreServices/backupd[7799]: Starting standard backup
Feb 1 17:02:25 koishi /System/Library/CoreServices/backupd[7799]: Backing up to: /Volumes/kuhi/Backups.backupdb
Feb 1 17:02:25 koishi /System/Library/CoreServices/backupd[7799]: Ownership is disabled on the backup destination volume. Enabling.
Feb 1 17:02:25 koishi KernelEventAgent[37]: tid 00000000 received unknown event (256)
Feb 1 17:02:26 koishi /System/Library/CoreServices/backupd[7799]: Event store UUIDs don't match for volume: koishi
Feb 1 17:05:20 koishi login[7705]: DEAD_PROCESS: 7705 ttys001
Feb 1 17:07:49 koishi /System/Library/CoreServices/backupd[7799]: Backup content size: 292.1 GB excluded items size: 26.4 GB for volume koishi
Feb 1 17:07:49 koishi /System/Library/CoreServices/backupd[7799]: Starting pre-backup thinning: 318.79 GB requested (including padding), 297.64 GB available
Feb 1 17:07:49 koishi /System/Library/CoreServices/backupd[7799]: No expired backups exist - deleting oldest backups to make room
Feb 1 17:07:49 koishi /System/Library/CoreServices/backupd[7799]: Error: backup disk is full - all 0 possible backups were removed, but space is still needed.
Feb 1 17:07:49 koishi /System/Library/CoreServices/backupd[7799]: Backup Failed: unable to free 318.79 GB needed space
Feb 1 17:07:54 koishi /System/Library/CoreServices/backupd[7799]: Backup failed with error: Not enough available disk space on the target volume.
I will now force a Spotlight re-indexing of my source drive.
d.

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    12/31/07 1:30:42 PM com.apple.launchd[1] (com.apple.metadata.mds[28]) Exited abnormally: Bus error
    12/31/07 1:30:42 PM com.apple.launchd[1] (0x10ba40.mdworker[96]) Exited: Terminated
    12/31/07 1:30:42 PM com.apple.launchd[1] (0x1004a0.mdworker[108]) Exited: Terminated
    12/31/07 1:30:42 PM mds[147] (/Volumes/Xxxxxx Time Machine/.Spotlight-V100/Store-V1/Stores/80F3EC85-D77A-49FE-8BDC-BB7C3B3EC1CF)(E rror) IndexCI in ContentIndexOpenBulk:Unclean shutdown of /Volumes/Xxxxxx Time Machine/.Spotlight-V100/Store-V1/Stores/80F3EC85-D77A-49FE-8BDC-BB7C3B3EC1CF/0. ; needs recovery
    12/31/07 1:30:43 PM ReportCrash[146] Saved crashreport to /Library/Logs/CrashReporter/mds2007-12-31-133038Xxxxxx-Xxxxxx-Computer.crash using uid: 0 gid: 0, euid: 0 egid: 0
    The Crash Report reads as follows (again with personal information x'ed out):
    Process: mds [28]
    Path: /System/Library/Frameworks/CoreServices.framework/Frameworks/Metadata.framework /Support/mds
    Identifier: mds
    Version: ??? (???)
    Code Type: PPC (Native)
    Parent Process: launchd [1]
    Date/Time: 2007-12-31 13:30:38.746 -0500
    OS Version: Mac OS X 10.5.1 (9B18)
    Report Version: 6
    Exception Type: EXCBADACCESS (SIGBUS)
    Exception Codes: KERNPROTECTIONFAILURE at 0x0000000000000030
    Crashed Thread: 15
    Thread 0:
    0 libSystem.B.dylib 0x92ed39d8 machmsgtrap + 8
    1 libSystem.B.dylib 0x92eda8fc mach_msg + 56
    2 com.apple.CoreFoundation 0x90214664 CFRunLoopRunSpecific + 1828
    3 mds 0x00059ab8 0x1000 + 363192
    4 mds 0x0000cfa0 0x1000 + 49056
    5 mds 0x00005580 0x1000 + 17792
    Thread 1:
    0 libSystem.B.dylib 0x92ed39d8 machmsgtrap + 8
    1 libSystem.B.dylib 0x92eda8fc mach_msg + 56
    2 com.apple.CoreFoundation 0x90214664 CFRunLoopRunSpecific + 1828
    3 mds 0x00059ab8 0x1000 + 363192
    4 mds 0x0005987c 0x1000 + 362620
    5 com.apple.Foundation 0x969c5d9c _NSThread__main_ + 1004
    6 libSystem.B.dylib 0x92f15bf8 pthreadstart + 316
    Thread 2:
    0 libSystem.B.dylib 0x92ed39d8 machmsgtrap + 8
    1 libSystem.B.dylib 0x92eda8fc mach_msg + 56
    2 com.apple.CoreFoundation 0x90214664 CFRunLoopRunSpecific + 1828
    3 mds 0x00059ab8 0x1000 + 363192
    4 mds 0x0005987c 0x1000 + 362620
    5 com.apple.Foundation 0x969c5d9c _NSThread__main_ + 1004
    6 libSystem.B.dylib 0x92f15bf8 pthreadstart + 316
    Thread 3:
    0 libSystem.B.dylib 0x92ed39d8 machmsgtrap + 8
    1 libSystem.B.dylib 0x92eda8fc mach_msg + 56
    2 com.apple.CoreFoundation 0x90214664 CFRunLoopRunSpecific + 1828
    3 mds 0x00059ab8 0x1000 + 363192
    4 mds 0x0005987c 0x1000 + 362620
    5 com.apple.Foundation 0x969c5d9c _NSThread__main_ + 1004
    6 libSystem.B.dylib 0x92f15bf8 pthreadstart + 316
    Thread 4:
    0 libSystem.B.dylib 0x92ed39d8 machmsgtrap + 8
    1 libSystem.B.dylib 0x92eda8fc mach_msg + 56
    2 com.apple.CoreFoundation 0x90214664 CFRunLoopRunSpecific + 1828
    3 mds 0x00059ab8 0x1000 + 363192
    4 mds 0x0005987c 0x1000 + 362620
    5 com.apple.Foundation 0x969c5d9c _NSThread__main_ + 1004
    6 libSystem.B.dylib 0x92f15bf8 pthreadstart + 316
    Thread 5:
    0 libSystem.B.dylib 0x92ed39d8 machmsgtrap + 8
    1 libSystem.B.dylib 0x92eda8fc mach_msg + 56
    2 com.apple.CoreFoundation 0x90214664 CFRunLoopRunSpecific + 1828
    3 mds 0x00059ab8 0x1000 + 363192
    4 mds 0x0005987c 0x1000 + 362620
    5 com.apple.Foundation 0x969c5d9c _NSThread__main_ + 1004
    6 libSystem.B.dylib 0x92f15bf8 pthreadstart + 316
    Thread 6:
    0 libSystem.B.dylib 0x92eda3ec _semwaitsignal + 12
    1 libSystem.B.dylib 0x92f16fa0 pthread_condwait + 1580
    2 mds 0x00009648 0x1000 + 34376
    3 libSystem.B.dylib 0x92f15bf8 pthreadstart + 316
    Thread 7:
    0 libSystem.B.dylib 0x92ee0ea0 read$UNIX2003 + 12
    1 mds 0x000091b4 0x1000 + 33204
    Thread 8:
    0 libSystem.B.dylib 0x92f15438 kevent + 12
    1 mds 0x0007e584 0x1000 + 513412
    Thread 9:
    0 libSystem.B.dylib 0x92ed39d8 machmsgtrap + 8
    1 libSystem.B.dylib 0x92eda8fc mach_msg + 56
    2 com.apple.CoreFoundation 0x90214664 CFRunLoopRunSpecific + 1828
    3 mds 0x00059ab8 0x1000 + 363192
    4 mds 0x0005987c 0x1000 + 362620
    5 com.apple.Foundation 0x969c5d9c _NSThread__main_ + 1004
    6 libSystem.B.dylib 0x92f15bf8 pthreadstart + 316
    Thread 10:
    0 libSystem.B.dylib 0x92ed39d8 machmsgtrap + 8
    1 libSystem.B.dylib 0x92eda8fc mach_msg + 56
    2 com.apple.CoreFoundation 0x90214664 CFRunLoopRunSpecific + 1828
    3 mds 0x00059ab8 0x1000 + 363192
    4 mds 0x0005987c 0x1000 + 362620
    5 com.apple.Foundation 0x969c5d9c _NSThread__main_ + 1004
    6 libSystem.B.dylib 0x92f15bf8 pthreadstart + 316
    Thread 11:
    0 libSystem.B.dylib 0x92ed39d8 machmsgtrap + 8
    1 libSystem.B.dylib 0x92eda8fc mach_msg + 56
    2 com.apple.CoreFoundation 0x90214664 CFRunLoopRunSpecific + 1828
    3 mds 0x00059ab8 0x1000 + 363192
    4 mds 0x0005987c 0x1000 + 362620
    5 com.apple.Foundation 0x969c5d9c _NSThread__main_ + 1004
    6 libSystem.B.dylib 0x92f15bf8 pthreadstart + 316
    Thread 12:
    0 libSystem.B.dylib 0x92ed39d8 machmsgtrap + 8
    1 libSystem.B.dylib 0x92eda8fc mach_msg + 56
    2 com.apple.CoreFoundation 0x90214664 CFRunLoopRunSpecific + 1828
    3 mds 0x00059ab8 0x1000 + 363192
    4 mds 0x0005987c 0x1000 + 362620
    5 com.apple.Foundation 0x969c5d9c _NSThread__main_ + 1004
    6 libSystem.B.dylib 0x92f15bf8 pthreadstart + 316
    Thread 13:
    0 libSystem.B.dylib 0x92ed39d8 machmsgtrap + 8
    1 libSystem.B.dylib 0x92eda8fc mach_msg + 56
    2 com.apple.spotlight.index 0x00207f0c _handleExceptions + 208
    3 libSystem.B.dylib 0x92f15bf8 pthreadstart + 316
    Thread 14:
    0 libSystem.B.dylib 0x92ed39d8 machmsgtrap + 8
    1 libSystem.B.dylib 0x92eda8fc mach_msg + 56
    2 com.apple.CoreFoundation 0x90214664 CFRunLoopRunSpecific + 1828
    3 mds 0x00059ab8 0x1000 + 363192
    4 mds 0x0005987c 0x1000 + 362620
    5 com.apple.Foundation 0x969c5d9c _NSThread__main_ + 1004
    6 libSystem.B.dylib 0x92f15bf8 pthreadstart + 316
    Thread 15 Crashed:
    0 com.apple.spotlight.index 0x002046cc ContentIndexContainsContentByDocId + 204
    1 com.apple.spotlight.index 0x00164358 QueryFunctionCallbackContext::findContent(db_obj*, __CFString const*, char*, int) + 244
    2 com.apple.spotlight.index 0x001634d0 qpContentIndexMatch(datastoreinfo*, dblazyobj*, query_piece*, void*, int) + 328
    3 com.apple.spotlight.index 0x0015587c comparefile_againsttree + 828
    4 com.apple.spotlight.index 0x00155d30 comparefile_againsttree + 2032
    5 com.apple.spotlight.index 0x00155d5c comparefile_againsttree + 2076
    6 com.apple.spotlight.index 0x001e307c -[SISearchCtx isObjectInQuery:withQuery:shortcut:] + 144
    7 com.apple.spotlight.index 0x001fa268 -[SISearchCtx_FSWalk performSearch:] + 996
    8 com.apple.spotlight.index 0x001e2cbc -[SISearchCtx executeSearchContextCracked_2:jobNum:] + 136
    9 com.apple.spotlight.index 0x00177e80 siwork_queueprocess + 752
    10 com.apple.spotlight.index 0x0017811c sischeduleronce + 356
    11 com.apple.spotlight.index 0x0017816c sischeduleronce + 436
    12 com.apple.spotlight.index 0x001784f8 sischeduler_run_waitingtimeout + 640
    13 com.apple.spotlight.index 0x0016529c runLoop + 72
    14 com.apple.spotlight.index 0x00165308 query_runLoop + 32
    15 libSystem.B.dylib 0x92f15bf8 pthreadstart + 316
    Thread 15 crashed with PPC Thread State 32:
    srr0: 0x002046cc srr1: 0x0200f030 dar: 0x00000030 dsisr: 0x40000000
    r0: 0x002046a4 r1: 0xf09a4380 r2: 0x00000000 r3: 0x00000000
    r4: 0xf09a43c0 r5: 0x00000000 r6: 0x000074d1 r7: 0x00000000
    r8: 0x003fc080 r9: 0x00000000 r10: 0x00000000 r11: 0x44000444
    r12: 0x92ede094 r13: 0x00000000 r14: 0x00000000 r15: 0x00373410
    r16: 0x00000000 r17: 0x00239e98 r18: 0x00000001 r19: 0x00227b9c
    r20: 0x00000000 r21: 0x00245554 r22: 0x00000001 r23: 0x00000001
    r24: 0x00000000 r25: 0x00000005 r26: 0x00000000 r27: 0x00000000
    r28: 0x00000000 r29: 0x00000005 r30: 0xf09a43c0 r31: 0x00204610
    cr: 0x24000444 xer: 0x20000004 lr: 0x002046a4 ctr: 0x92ede094
    vrsave: 0x00000000
    Binary Images:
    0x1000 - 0xc1ffb mds ??? (???) <af9cc958b4b030835101ff024186c7d3> /System/Library/Frameworks/CoreServices.framework/Frameworks/Metadata.framework /Support/mds
    0xde000 - 0xe0ffd com.apple.MDSChannel 1.0 (1.0) /System/Library/PrivateFrameworks/MDSChannel.framework/Versions/A/MDSChannel
    0x139000 - 0x23fffb com.apple.spotlight.index 10.5.0 (398.1) <5843125c709dd85f22f9bd42744beea5> /System/Library/PrivateFrameworks/SpotlightIndex.framework/Versions/A/Spotlight Index
    0x1ca9000 - 0x1caaffc liblangid.dylib ??? (???) <5f078ac1f623f5ce432ea53fc29338c0> /usr/lib/liblangid.dylib
    0x2198000 - 0x22bdffb libmecab.1.0.0.dylib ??? (???) <cd875e74974e4ec3a0b13eeeb236fa53> /usr/lib/libmecab.1.0.0.dylib
    0x8fe00000 - 0x8fe309d3 dyld 95.3 (???) <a7be977c203ec5c76b2f25a7aef66554> /usr/lib/dyld
    0x90123000 - 0x9016effb com.apple.Metadata 10.5.0 (398) <b6bb1fd5a7a9135f546b2d8cbd65eafc> /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/Metadat a.framework/Versions/A/Metadata
    0x901ab000 - 0x902d0ff3 com.apple.CoreFoundation 6.5 (476) <9073c2bfdf6842562c8b7f0308109c02> /System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation
    0x9060a000 - 0x90612fff libbsm.dylib ??? (???) <c1fca3cbe3b1c21e9b31bc89b920f34c> /usr/lib/libbsm.dylib
    0x90683000 - 0x90688ff6 libmathCommon.A.dylib ??? (???) /usr/lib/system/libmathCommon.A.dylib
    0x90757000 - 0x907d2fff com.apple.SearchKit 1.2.0 (1.2.0) <1b448fbae02460eae76ee1c6883f45d6> /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/SearchK it.framework/Versions/A/SearchKit
    0x9088a000 - 0x9090ffff libsqlite3.0.dylib ??? (???) <7b379cb4220346e99c32c427d4539496> /usr/lib/libsqlite3.0.dylib
    0x90aa7000 - 0x90ab5fff libz.1.dylib ??? (???) <1a70dd3594a8c5ad39d785af5da23237> /usr/lib/libz.1.dylib
    0x90b50000 - 0x90be2fff com.apple.framework.IOKit 1.5.1 (???) <591b8b0cc4261db98a6e72e38eef5f9a> /System/Library/Frameworks/IOKit.framework/Versions/A/IOKit
    0x91105000 - 0x9116cffb libstdc++.6.dylib ??? (???) <a4e9b10268b3ffac26d0296499b24e8e> /usr/lib/libstdc++.6.dylib
    0x9116d000 - 0x912b5ff3 libicucore.A.dylib ??? (???) <250daed2fb2e6bf114480e2e4da0728b> /usr/lib/libicucore.A.dylib
    0x91c3c000 - 0x91d32ffc libiconv.2.dylib ??? (???) <05ae1fcc97404173b2f9caef8f8be797> /usr/lib/libiconv.2.dylib
    0x91d3a000 - 0x91db4ffd com.apple.CFNetwork 220 (221) <00b882d3d3325526b78ded74880759fe> /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/CFNetwo rk.framework/Versions/A/CFNetwork
    0x9236a000 - 0x92382ffb com.apple.DictionaryServices 1.0.0 (1.0.0) <fe37191e732eeb66189185cd000a210b> /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/Diction aryServices.framework/Versions/A/DictionaryServices
    0x92383000 - 0x9238effb libgcc_s.1.dylib ??? (???) <ea47fd375407f162c76d14d64ba246cd> /usr/lib/libgcc_s.1.dylib
    0x92742000 - 0x92769fff libxslt.1.dylib ??? (???) <3700d04090629deddb436aa2d516c56d> /usr/lib/libxslt.1.dylib
    0x92777000 - 0x92860fff libxml2.2.dylib ??? (???) <6f383df1e1e775be0158ba947784ae13> /usr/lib/libxml2.2.dylib
    0x928aa000 - 0x928b9fff com.apple.DSObjCWrappers.Framework 1.2 (1.2) <2411674c821a8907449ac741ce6a40c3> /System/Library/PrivateFrameworks/DSObjCWrappers.framework/Versions/A/DSObjCWra ppers
    0x92a17000 - 0x92afafeb libobjc.A.dylib ??? (???) <4a90e315bd1718c3f5ae09ee6c23e36c> /usr/lib/libobjc.A.dylib
    0x92afb000 - 0x92bc9ff7 com.apple.CoreServices.OSServices 210.2 (210.2) <bad4943629f870d305f2bc7c6dfffe2d> /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/OSServi ces.framework/Versions/A/OSServices
    0x92bde000 - 0x92dbfffb com.apple.security 5.0.1 (32736) <15632bf9bbdb223194b3d79a2e48e02d> /System/Library/Frameworks/Security.framework/Versions/A/Security
    0x92e9a000 - 0x92ec5ff7 libauto.dylib ??? (???) <c1f2bd227817ad7c7bf29ec74729ac7c> /usr/lib/libauto.dylib
    0x92ed2000 - 0x9306bfe3 libSystem.B.dylib ??? (???) <8a6cd873dfa7ada786efac188f95ed1b> /usr/lib/libSystem.B.dylib
    0x931a7000 - 0x934a7ff3 com.apple.CoreServices.CarbonCore 783 (783) <fd2acaf23e95472f78b8a077fa039986> /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/CarbonC ore.framework/Versions/A/CarbonCore
    0x946f2000 - 0x9472afff com.apple.SystemConfiguration 1.9.0 (1.9.0) <d925dde7699e6231c88a41b0254a7591> /System/Library/Frameworks/SystemConfiguration.framework/Versions/A/SystemConfi guration
    0x94933000 - 0x9494eff3 com.apple.DirectoryService.Framework 3.5 (3.5) <3246a5d1c6a3d678798a90e8c5cd3677> /System/Library/Frameworks/DirectoryService.framework/Versions/A/DirectoryServi ce
    0x9494f000 - 0x9494fffa com.apple.CoreServices 32 (32) <42b6dda539f7411606187335d9eae0c5> /System/Library/Frameworks/CoreServices.framework/Versions/A/CoreServices
    0x94c68000 - 0x94c9dfff com.apple.AE 402 (402) <a4b92c8ac89cc774b85fb44c48b9d882> /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/AE.fram ework/Versions/A/AE
    0x96831000 - 0x9683afff com.apple.DiskArbitration 2.2 (2.2) <9c8f8ade43fa25b32109ef9dcc0cb5d5> /System/Library/Frameworks/DiskArbitration.framework/Versions/A/DiskArbitration
    0x9683b000 - 0x968d1ff7 com.apple.LaunchServices 286 (286) <a3a0b2af862e9a8945072f8cb523678f> /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/LaunchS ervices.framework/Versions/A/LaunchServices
    0x969bc000 - 0x96c00ffb com.apple.Foundation 6.5.1 (677.1) <4152239382fb0f48abbcbf35bd04afa6> /System/Library/Frameworks/Foundation.framework/Versions/C/Foundation
    0xfffec000 - 0xfffeffff libobjc.A.dylib ??? (???) /usr/lib/libobjc.A.dylib
    0xffff8000 - 0xffff9703 libSystem.B.dylib ??? (???) /usr/lib/libSystem.B.dylib
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