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Thread: Load THD slices and loopsets into a THDXL image to convert it to a true THD image?

  1. #1
    Join Date
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    Load THD slices and loopsets into a THDXL image to convert it to a true THD image?

    Over TCF, Jamie P posted the following in response to a comment about issues caused by running TivoHD XL image on an unmodified TivoHD:
    It should be possible to load THD slices and loopsets into a THDXL image to convert it to a true THD image with the THDXL partition layout. You'd need a "hacked" tivo to do that, but once done, anyone would use the image, after a C&DE.
    Has anyone done this?

  2. #2
    Join Date
    Nov 2004
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    Ciper was experimenting with this, though I don't know how far he got.

    Creating loopset slices is non-trivial; it would probably be easier to forge loopset objects to point to the XL's loopsets.

  3. #3
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    It's not that hard to extract loopset resources and move them to another tivo. See the "mfs from scratch" thread. They don't have to be formatted as slices. The only tricky part may be making sure they get a low fsid so that they don't get lost when someone makes a backup with a low mfsbackup -f option value.

    If I remember right, there are only two loopset resources that are different between the two platforms. Forging might be an option too, but it seems better to match the loopsets from a real THD image.

  4. #4
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    I created a loopset slice from THD loopsets a while back and tried to load them on my HR10-250. I never did get all of that working correctly, but the slice did load correctly, though. Perhaps it might be easier to get it to work in this case. I don't have the scripts anymore that I used to create the slice, but I could probably recreate them. I don't have any use for this myself, so I probably won't pursue it too far, but if someone else would want the slice, I'll post it somewhere if I can successfully build it again.

  5. #5
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    Quote Originally Posted by Jamie View Post
    The only tricky part may be making sure they get a low fsid so that they don't get lost when someone makes a backup with a low mfsbackup -f option value.
    I think if you just loaded tivoapp in a minimal state (it's been a while but I think you comment out everything past stage d in the rc.sysinit,) you could mfsrubbishtree / (or if mfsrubbishtree doesn't allow doing that to the root directory for safety reasons, I haven't tried, then just zap each directory individually,) and after that is done do an mfslive truncated backup and it'll probably leave a completely blank mfs image when you restore.

    From there boot to another minimal MFS state then dbload the loopsets and then the software slices and I don't think there'd be any issue.

    I'd test this rather than just talk about it except I don't have the physical hardware needed to do so at the moment, and probably won't for a while.
    Last edited by AlphaWolf; 07-31-2009 at 04:34 AM.
    Before PMing me: Iím not your personal tech support. If you have a question, ask in public so I don't have to repeat if somebody else asks. If you want images or slices, use emule. I will ignore all support PMs.

    Sponsor a vegetarian! I have taken the pledge, how about you?

  6. #6
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    Quote Originally Posted by AlphaWolf View Post
    I think if you just loaded tivoapp in a minimal state (it's been a while but I think you comment out everything past stage d in the rc.sysinit,) you could mfsrubbishtree / (or if mfsrubbishtree doesn't allow doing that to the root directory for safety reasons, I haven't tried, then just zap each directory individually,) and after that is done do an mfslive truncated backup and it'll probably leave a completely blank mfs image when you restore.

    From there boot to another minimal MFS state then dbload the loopsets and then the software slices and I don't think there'd be any issue.

    I'd test this rather than just talk about it except I don't have the physical hardware needed to do so at the moment, and probably won't for a while.
    I could be wrong, but I think your process doesn't reset the starting fsid for allocation, and you'll still end up with high fsid's for the loopset resources.

    It would be nice if we had an mfs64 fsmake.

  7. #7
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    Got bored today and decided to give this a shot

    The only differences (besides a few *.png refs) between the THD and XL images were the *Maroon* loopsets. I extracted these loopsets from a THD image and created a slice from them. I then restored an XL image to a spare drive and dbload'd that slice.

    Even after nuking most everything from mfs and running a C&DE, I still couldn't get the loopsets inserted with a low fsid, but was still able to get everything backed up successfully.

    Haven't tested the images on a drive larger than 1TB since I don't currently have a spare one, but everything seems to work fine on this drive so far.

    If anyone would like to give the image a try, shoot me a pm. They're both (winmfs *.tbk & mfstools *.mfs) over 400 MB so it would be prefered if you're familiar with setting up an ftp server. A C&DE is not necessary before using these images since I nuked most everything from mfs before doing the backup.

    Attached is the quick and dirty script I wrote to extract the loopsets and dump everything into a writeguide compatible format for slice creation. Source code for Tridge's writeguide can found here among other places on the 'net. Note that the script dumps all LoopSet resources, not just the *Maroon* ones, so some editing of the script or resultant output may be warranted before slice creation.
    Attached Files Attached Files

  8. #8
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    I think you'd need a relatively "fresh" XL image (i.e., backup made before running the unit in earnest) to ensure the loaded loopset slices receive low FSIDs.

    But to understand, after loading the TiVoHD loopsets onto the XL image, you confirmed that you could load TiVoHD software slices into the XL image and successfully install them? That would presumably yield a valid TiVoHD [non-XL] software image with base 1TB MFS, suitable for expansion to 2TB.

  9. #9
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    I believe you're correct. The XL image I started with contained a full keyring, guide data, etc. It certainly wasn't "fresh." (seems it came from an instantcake image)

    But to understand, after loading the TiVoHD loopsets onto the XL image, you confirmed that you could load TiVoHD software slices into the XL image and successfully install them?
    yup
    Code:
    TiVo_HD#[/] $ echo mls /SwSystem | tivosh
    Directory of /SwSystem starting at ''
    
        Name                      Type        FsId      Date  Time   Size
        ----                      ----        ----      ----  ----   ----
        11.0b-01-2-658            tyDb       13272  01/27/10 00:01    884
        11.0d-01-2-652            tyDb       16163  01/27/10 00:07    908
        ACTIVE                    tyDb       16163  01/27/10 00:07    908
    That would presumably yield a valid TiVoHD [non-XL] software image with base 1TB MFS, suitable for expansion to 2TB.
    Hopefully someone can test the image and see.

    I've noticed a few oddities with the "hybrid" image however. For example, pdisk reports "No partition map exists". Will keep poking at it...

    Code:
    TiVo_HD#[/] $ mfs_info
    Super:
            state=0 magic=ebbafeed
            devlist=/dev/hda10 /dev/hda11 /dev/hda12 /dev/hda13
            zonemap_ptr=1121 total_secs=1951672320 next_fsid=200000
            backup_zonemap_ptr=8fffe zonemap_size=1
    /dev/hda10 has 589824 sectors
    /dev/hda11 has 876054528 sectors
    /dev/hda12 has 589824 sectors
    /dev/hda13 has 1074438144 sectors
    zone(0):
            sector=1121 backup_sector=589822 next_zonemap_ptr=263266 backup_next_zonemap_ptr=589788 next_size=876052480
            zone_start: 1122 zone_last: 263265 zone_size: 262144 free: 262144
            next_zonemap_size: 34 zonemap_size: 1 per_chunk: 262144 next_per_chunk: 20480
            logstamp: 73709 type: 0 crc: e3654be0 zero: 0 buddy_size: 1
    00000000 00 00 00 00 00 00 04 61 00 00 00 00 00 08 ff fe
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    zone(1):
            sector=263266 backup_sector=589788 next_zonemap_ptr=263300 backup_next_zonemap_ptr=589754 next_size=326416
            zone_start: 589824 zone_last: 876642303 zone_size: 876052480 free: 872509440
            next_zonemap_size: 34 zonemap_size: 34 per_chunk: 20480 next_per_chunk: 8
            logstamp: 73745 type: 2 crc: 052bb459 zero: 0 buddy_size: 17
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    zone(2):
            sector=263300 backup_sector=589754 next_zonemap_ptr=876644352 backup_next_zonemap_ptr=877234175 next_size=262144
            zone_start: 263334 zone_last: 589749 zone_size: 326416 free: 193584
            next_zonemap_size: 1 zonemap_size: 34 per_chunk: 8 next_per_chunk: 262144
            logstamp: 73745 type: 1 crc: b58b5ef2 zero: 0 buddy_size: 17
    00000000 00 00 00 00 00 04 04 84 00 00 00 00 00 08 ff ba
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    zone(3):
            sector=876644352 backup_sector=877234175 next_zonemap_ptr=876906497 backup_next_zonemap_ptr=877234141 next_size=1074421760
            zone_start: 876644353 zone_last: 876906496 zone_size: 262144 free: 262144
            next_zonemap_size: 34 zonemap_size: 1 per_chunk: 262144 next_per_chunk: 20480
            logstamp: 73709 type: 0 crc: a22dd95f zero: 0 buddy_size: 1
    00000000 00 00 00 00 34 40 88 00 00 00 00 00 34 49 87 ff
    00000010 00 00 00 00 34 44 88 01 00 00 00 00 34 49 87 dd
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    zone(4):
            sector=876906497 backup_sector=877234141 next_zonemap_ptr=876906531 backup_next_zonemap_ptr=877234107 next_size=327536
            zone_start: 877234176 zone_last: 1951655935 zone_size: 1074421760 free: 1072701440
            next_zonemap_size: 34 zonemap_size: 34 per_chunk: 20480 next_per_chunk: 8
            logstamp: 73745 type: 2 crc: 1e5dd144 zero: 0 buddy_size: 17
    00000000 00 00 00 00 34 44 88 01 00 00 00 00 34 49 87 dd
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    zone(5):
            sector=876906531 backup_sector=877234107 next_zonemap_ptr=0 backup_next_zonemap_ptr=-6148914691236517206 next_size=0
            zone_start: 876906565 zone_last: 877234100 zone_size: 327536 free: 262912
            next_zonemap_size: 0 zonemap_size: 34 per_chunk: 8 next_per_chunk: 0
            logstamp: 73745 type: 1 crc: 850c87f2 zero: 0 buddy_size: 17
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    total_inodes: 262144
    Last edited by jt1134; 02-17-2010 at 05:50 AM.

  10. #10
    Join Date
    Jun 2006
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    Dougal County
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    I've posted a link to the "hybrid" image here for anyone interested.

    edit - download link removed
    Last edited by jt1134; 02-08-2010 at 06:29 PM.

  11. #11
    Join Date
    Jun 2006
    Location
    Dougal County
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    Managed to acquire a 1.5TB drive today and restore the hybrid image to it

    System information screen reports 237 HD hours / 2072 SD hours

    Code:
    Partition Maps
     #:                  type name                            length base      ( size  )
      1   Apple_partition_map Apple                               63@1         (  31.5K)
      2                 Image Bootstrap 1                          1@1950492736( 512.0 )
      3                 Image Kernel 1                          8192@1950492737(   4.0M)
      4                  Ext2 Root 1                          524288@1950500929( 256.0M)
      5                 Image Bootstrap 2                          1@1951025217( 512.0 )
      6                 Image Kernel 2                          8192@1951025218(   4.0M)
      7                  Ext2 Root 2                          524288@1951033410( 256.0M)
      8                  Swap Linux swap                      262144@1951557698( 128.0M)
      9                  Ext2 /var                            524288@1951819842( 256.0M)
     10                   MFS MFS application region          589824@1952344130( 288.0M)
     11                   MFS MFS media region             876054528@1074438208( 417.7G)
     12                   MFS MFS application region 2        589824@1952933954( 288.0M)
     13                   MFS MFS media region 2          1074438144@64        ( 512.3G)
     14                   MFS MFS App by Winmfs                 2048@1953523778(   1.0M)
     15                   MFS MFS Media by Winmfs          976732160@1953525826( 465.7G)
    Code:
    Zone Maps
    Z0:	type=0
    	map_start=1121 map_size=1 backup_map_start=589822
    	next_map_start=263266 next_map_size=34 next_backup_map_start=589788
    	zone_first=1122 zone_last=263265 zone_size=262144 min(chunk)=262144
    	free=262144 checksum=8ac81e70 logstamp=45323 num_bitmap=1
    Z1:	type=2
    	map_start=263266 map_size=34 backup_map_start=589788
    	next_map_start=263300 next_map_size=34 next_backup_map_start=589754
    	zone_first=589824 zone_last=876642303 zone_size=876052480 min(chunk)=20480
    	free=872714240 checksum=3877c27f logstamp=45397 num_bitmap=17
    Z2:	type=1
    	map_start=263300 map_size=34 backup_map_start=589754
    	next_map_start=876644352 next_map_size=1 next_backup_map_start=877234175
    	zone_first=263334 zone_last=589749 zone_size=326416 min(chunk)=8
    	free=254560 checksum=301b77a9 logstamp=45479 num_bitmap=17
    Z3:	type=0
    	map_start=876644352 map_size=1 backup_map_start=877234175
    	next_map_start=876906497 next_map_size=34 next_backup_map_start=877234141
    	zone_first=876644353 zone_last=876906496 zone_size=262144 min(chunk)=262144
    	free=262144 checksum=cb808ccf logstamp=45323 num_bitmap=1
    Z4:	type=2
    	map_start=876906497 map_size=34 backup_map_start=877234141
    	next_map_start=876906531 next_map_size=34 next_backup_map_start=877234107
    	zone_first=877234176 zone_last=1951655935 zone_size=1074421760 min(chunk)=20480
    	free=1072496640 checksum=721ed43f logstamp=45397 num_bitmap=17
    Z5:	type=1
    	map_start=876906531 map_size=34 backup_map_start=877234107
    	next_map_start=1951672320 next_map_size=35 next_backup_map_start=1951674333
    	zone_first=876906565 zone_last=877234100 zone_size=327536 min(chunk)=8
    	free=268112 checksum=b7846c41 logstamp=45479 num_bitmap=17
    Z6:	type=2
    	map_start=1951672320 map_size=35 backup_map_start=1951674333
    	next_map_start=0 next_map_size=0 next_backup_map_start=0
    	zone_first=1951674368 zone_last=2928406527 zone_size=976732160 min(chunk)=20480
    	free=976732160 checksum=6f43aee5 logstamp=0 num_bitmap=17

  12. #12
    Join Date
    Apr 2005
    Posts
    7

    Another Success.

    I got the image last night, and today, restored it to a 1.5TB Western Digital "Green" drive.

    After going through Guided Set-Up, everything appears to be working fine!

    System shows 237 / 2072 hours (as JT1134).

    Someday soon, I'll try it on a 2TB expansion.

    I still need to run the WD utility to fix the soft boot issue.

    Anyone want any data / dumps / screenshots / etc?

  13. #13
    Join Date
    Apr 2005
    Posts
    7
    Here's the MFSinfo...

    It appears that the WinMFS I used to restore the image doesn't properly reflect the new drive size.... but the space is there, according to the Tivo.
    Attached Files Attached Files

  14. #14
    Join Date
    Apr 2005
    Posts
    7
    An update.

    The unit just took the latest software update from tivo (11.0g) with no issues.

    All is well; I am enjoying the 1.5 TB of space.

  15. #15
    Join Date
    Jul 2005
    Posts
    2
    The hybrid image discussed above, is it mfstools compatible or does it require WinMFS to install? (Or are they the same format? Does WinMFS use the same mfstools code?) As a Mac user, I normally use the mfsLive CD to boot a Mac. Will the image work with mfsLive?

    Wondering too, how is the difference in max size implemented? That is, what about the XL allows a bigger volume size? Is it strictly the partition scheme used? Or is there code different in the two models?

    It sounds like this image is an XL image with HD s/w inserted, replacing the XL s/w. So, what, exactly limits the normal HD to 1.2 TB?

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