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Old 12-25-2013, 12:26 AM   #31
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Location: semi-coastal NC
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For what it's worth, here's how WinMFS's mfsinfo sees the original 160GB drive from a 652:

Mfsinfo (Drive 7)

Boot Page
Boot Page: root=/dev/hda4
Active Boot Partition: 3 Active Root Partition: 4
Backup Boot Partition: 6 Backup Root Partition: 7

MFS Super Header
state=0 magic=ebbafeed
devlist=/dev/hda10 /dev/hda11 /dev/hda12 /dev/hda13
zonemap_ptr=1121 total_secs=310728704

Zone Maps
Z0: type=0
map_start=1121 map_size=1 backup_map_start=589822
next_map_start=263266 next_map_size=6 next_backup_map_start=589816
zone_first=1122 zone_last=263265 zone_size=262144 min(chunk)=262144
free=262144 checksum=85e1adbd logstamp=8742226 num_bitmap=1
Z1: type=2
map_start=263266 map_size=6 backup_map_start=589816
next_map_start=263272 next_map_size=34 next_backup_map_start=589782
zone_first=589824 zone_last=138215423 zone_size=137625600 min(chunk)=20480
free=136642560 checksum=e6cdcfd0 logstamp=8742253 num_bitmap=14
Z2: type=1
map_start=263272 map_size=34 backup_map_start=589782
next_map_start=138219520 next_map_size=1 next_backup_map_start=138809343
zone_first=263306 zone_last=589777 zone_size=326472 min(chunk)=8
free=253672 checksum=8b005ca4 logstamp=8742253 num_bitmap=17
Z3: type=0
map_start=138219520 map_size=1 backup_map_start=138809343
next_map_start=138481665 next_map_size=10 next_backup_map_start=138809333
zone_first=138219521 zone_last=138481664 zone_size=262144 min(chunk)=262144
free=262144 checksum=a1a4437d logstamp=8742226 num_bitmap=1
Z4: type=2
map_start=138481665 map_size=10 backup_map_start=138809333
next_map_start=138481675 next_map_size=34 next_backup_map_start=138809299
zone_first=138809344 zone_last=310718463 zone_size=171909120 min(chunk)=20480
free=167772160 checksum=22ca713f logstamp=8742253 num_bitmap=15
Z5: type=1
map_start=138481675 map_size=34 backup_map_start=138809299
next_map_start=0 next_map_size=0 next_backup_map_start=-6148914691236517206
zone_first=138481709 zone_last=138809292 zone_size=327584 min(chunk)=8
free=320560 checksum=8fea37b logstamp=8742226 num_bitmap=17

Partition Maps
#: type name length base ( size )
1 Apple_partition_map Apple 63@1 ( 31.5K)
2 Image Bootstrap 1 1@171920054 ( 512.0 )
3 Image Kernel 1 8192@171920055 ( 4.0M)
4 Ext2 Root 1 524288@171928247 ( 256.0M)
5 Image Bootstrap 2 1@172452535 ( 512.0 )
6 Image Kernel 2 8192@172452536 ( 4.0M)
7 Ext2 Root 2 524288@172460728 ( 256.0M)
8 Swap Linux swap 262144@172985016 ( 128.0M)
9 Ext2 /var 524288@173247160 ( 256.0M)
10 MFS MFS application region 589824@173771448 ( 288.0M)
11 MFS MFS media region 137630712@174951096 ( 65.6G)
12 MFS MFS application region 2 589824@174361272 ( 288.0M)
13 MFS MFS media region 2 171919990@64 ( 82.0G)

Total SA SD Hours: 165 Total DTV SD Hours: 144 98 % Free
Software: 11.0k-01-2-652 Tivo Model: TCD652160


Partition 1, the partition map, comes first, followed by partition 13, the 2nd MFS media partition, followed by 3, 4, 5, 6, 7, 8, 9, 10, 12, 11.


"I am altering the deal. Pray I don't alter it any further."

Darth TiVo, 14 February, 2011
unitron is offline   Reply With Quote
Old 12-25-2013, 06:32 AM   #32
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Posts: 3,972
Originally Posted by unitron View Post
For what it's worth, here's how WinMFS's mfsinfo sees the original 160GB drive from a 652:
That matches the OP's drive and the one I cooked up. Good to know.

ggieseke is offline   Reply With Quote
Old 12-28-2013, 09:52 AM   #33
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Location: Iowa
Posts: 20
Okay, I was able to use the provided 512 byte header and overwrite the primary and backup headers on my clone drive. I just highlighted the same 512 bytes on the drive and pasted it in there.

The first bootup, I didn't see a GSOD, but then it rebooted and subsequent boots had GSOD. I let it loop overnight just to make sure it wasn't FSCKing something.

I'm wondering if maybe replacing the header isn't working because my clone drive isn't exactly like the factory drive? I mean, it's pretty close, but it still has some minor differences, right?

Other than that I'm out of guesses for today. You guys are operating at a level over and above what I know.

I'm attaching the two headers that I overwrote with yours. It did look like your good one "fit" into the sector, if that makes any sense.


Attached Files
File Type: zip MfsVolumeHeaders.zip (436 Bytes, 3 views)
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Old 12-28-2013, 12:10 PM   #34
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Posts: 3,972
I haven't analyzed your backups fully or run a checksum, but they look OK at first glance. Have you had a chance to run mfsinfo to see if it gets past the previous "volume header not found" error message?

If necessary we can try to replace all 6 zone headers too. If the data in the actual zones is corrupt it's a lost cause, but if the damage was limited to a few sectors it might work.

Even if the clone isn't exactly the same it shouldn't matter as long as the cloned drive is at least as big as the original and it's not over 2TB. I haven't proved one way or the other whether Series 3s with a recent OS can break that barrier.

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