Chumby gets a new card

Bought an 8GB Sandisk C4 MicroSDHC card to use with the chumby.

[261960.474288] sd 6:0:0:1: [sdc] 3854336 512-byte logical blocks: (1.97 GB/1.83 GiB)
[261960.487488]  sdc: sdc1 sdc2 sdc3 sdc4 < sdc5 sdc6 >

iofiel% fdisk -l /dev/sdc

Disk /dev/sdc: 1973 MB, 1973420032 bytes
5 heads, 4 sectors/track, 192716 cylinders
Units = cylinders of 20 * 512 = 10240 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

   Device Boot      Start         End      Blocks   Id  System
/dev/sdc1               1       14670      146697+  53  OnTrack DM6 Aux3
/dev/sdc2            1563       14063      125000+  83  Linux
/dev/sdc3           14063       26563      125000+  83  Linux
/dev/sdc4           26563      192308     1657444    5  Extended
/dev/sdc5           26564       39063      124998+  83  Linux
/dev/sdc6           39064      192308     1532441+  83  Linux

iofiel% dd if=/dev/sdc of=chumby2G.img
3854336+0 records in
3854336+0 records out
1973420032 bytes (2.0 GB) copied, 119.449 s, 16.5 MB/s
iofiel% eject sdc

And the new card...

[262427.694384] sd 7:0:0:1: [sdc] 15523840 512-byte logical blocks: (7.94 GB/7.40 GiB)
iofiel% dd if=chumby2G.img of=/dev/sdc
3854336+0 records in
3854336+0 records out
1973420032 bytes (2.0 GB) copied, 1041.09 s, 1.9 MB/s
You have new mail.                                                                                                  
iofiel% sync
iofiel% eject sdc

Plug back in...

[263569.155489]  sdc: sdc1 sdc2 sdc3 sdc4 < sdc5 sdc6 >

iofiel% sudo fdisk /dev/sdc       

WARNING: DOS-compatible mode is deprecated. It's strongly recommended to
         switch off the mode (command 'c') and change display units to
         sectors (command 'u').

Command (m for help): p

Disk /dev/sdc: 7948 MB, 7948206080 bytes
5 heads, 4 sectors/track, 776192 cylinders
Units = cylinders of 20 * 512 = 10240 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

   Device Boot      Start         End      Blocks   Id  System
/dev/sdc1               1       14670      146697+  53  OnTrack DM6 Aux3
/dev/sdc2            1563       14063      125000+  83  Linux
/dev/sdc3           14063       26563      125000+  83  Linux
/dev/sdc4           26563      192308     1657444    5  Extended
/dev/sdc5           26564       39063      124998+  83  Linux
/dev/sdc6           39064      192308     1532441+  83  Linux

Command (m for help): v
Warning: partition 1 overlaps partition 2.
Warning: partition 1 overlaps partition 3.
Remaining 11677702 unallocated 512-byte sectors

Command (m for help): d
Partition number (1-6): 4

Command (m for help): n
Command action
   e   extended
   p   primary partition (1-4)
e
Selected partition 4
First cylinder (26563-776192, default 26563): 
Using default value 26563
Last cylinder, +cylinders or +size{K,M,G} (26563-776192, default 776192): 
Using default value 776192

Command (m for help): n
First cylinder (26564-776192, default 26564): 
Using default value 26564
Last cylinder, +cylinders or +size{K,M,G} (26564-776192, default 776192): 39063

Command (m for help): n
First cylinder (39064-776192, default 39064): 
Using default value 39064
Last cylinder, +cylinders or +size{K,M,G} (39064-776192, default 776192): 
Using default value 776192

Command (m for help): v
Warning: partition 1 overlaps partition 2.
Warning: partition 1 overlaps partition 3.
Remaining 7 unallocated 512-byte sectors

Command (m for help): p

Disk /dev/sdc: 7948 MB, 7948206080 bytes
5 heads, 4 sectors/track, 776192 cylinders
Units = cylinders of 20 * 512 = 10240 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

   Device Boot      Start         End      Blocks   Id  System
/dev/sdc1               1       14670      146697+  53  OnTrack DM6 Aux3
/dev/sdc2            1563       14063      125000+  83  Linux
/dev/sdc3           14063       26563      125000+  83  Linux
/dev/sdc4           26563      776192     7496291+   5  Extended
/dev/sdc5           26564       39063      124999+  83  Linux
/dev/sdc6           39064      776192     7371288   83  Linux

Command (m for help): w
The partition table has been altered!

Calling ioctl() to re-read partition table.
Syncing disks.


iofiel% resize2fs /dev/sdc6 
resize2fs 1.41.12 (17-May-2010)
resize2fs: Bad magic number in super-block while trying to open /dev/sdc6
Couldn't find valid filesystem superblock.

Ok, not quite as planned. Parted also can't seem to cope with the funky overlapping first partition. So I'm trying fdisk. I have a dump of /mnt/storage, so I made a new ext3fs and restored the files. Reassemble partly, power up and hold breath...

chumby:~# dmesg -c
gcc version 4.3.2 (Sourcery G++ Lite 2008q3-72) ) #1 PREEMPT Tue Mar 2 16:09:35 PST 2010
[    0.000000] CPU: ARM926EJ-S [41069265] revision 5 (ARMv5TEJ), cr=00053177
[    0.000000] CPU: VIVT data cache, VIVT instruction cache
[    0.000000] Machine: STMP378X
...
[    1.530000] Waiting for root device /dev/mmcblk0p2...
[    1.580000] mmc0: new SDHC card at address e624
[    1.590000] mmcblk0: mmc0:e624 SU08G 3.40 GiB 
[    1.590000]  mmcblk0: p1 p2 p3 p4 < p5 p6 >
...

chumby:~# df -h
Filesystem                Size      Used Available Use% Mounted on
/dev/mmcblk0p2          118.2M     97.1M     15.0M  87% /
tmpfs                    29.3M    640.0k     28.7M   2% /tmp
none                     32.0M     60.0k     31.9M   0% /var
none                     32.0M         0     32.0M   0% /mnt
/dev/mmcblk0p5          122.0M      4.1M    111.8M   4% /psp
/dev/mmcblk0p6            6.9G    247.8M      6.3G   4% /mnt/storage
none                     32.0M     44.0k     32.0M   0% /dev

Ok, now I should have a new card to play with, a backup image, and the old card to boot in case of bricking incidents.

Edit: It might be safe to fix the partition table.