Root Partition Question

[MrB206]

I PM'd Neph, but I wanted to see if I could get an answer faster by also posting here.

He posted our partitions as

major minor #blocks name
179 0 3526656 mmcblk0
179 1 32768 mmcblk0p1 = /firmware vfat
179 2 1024 mmcblk0p2 = SBL2?
179 3 1024 mmcblk0p3 = SBL3?
179 4 1 mmcblk0p4
179 5 1024 mmcblk0p5
179 6 5120 mmcblk0p6 = ROM update commands - ipth
179 7 5120 mmcblk0p7 = DemiGod Crash Handler/Factory Reset Module
179 8 10240 mmcblk0p8 = /boot emmc
179 9 1024 mmcblk0p9
179 10 3072 mmcblk0p10
179 11 3072 mmcblk0p11
179 12 8192 mmcblk0p12 = /persist ext4 blocks = 4096
179 13 16384 mmcblk0p13 = /recovery emmc
179 14 32768 mmcblk0p14 = /system/etc/firmware/misc_mdm vfat
179 15 3072 mmcblk0p15
179 16 3072 mmcblk0p16
179 17 3072 mmcblk0p17 = empty
179 18 3072 mmcblk0p18 = empty
179 19 1024 mmcblk0p19 = empty
179 20 8192 mmcblk0p20 = /drm ext4
179 21 16384 mmcblk0p21 = empty
179 22 73728 mmcblk0p22 = /tombstones ext4
179 23 8192 mmcblk0p23 = /mm ext4
179 24 24576 mmcblk0p24
179 25 8192 mmcblk0p25 = /misc emmc
179 26 1048576 mmcblk0p26 = /system ext4
179 27 270336 mmcblk0p27 = /cache ext4 blocks = 4096
179 28 1843200 mmcblk0p28 = /data ext4 blocks = 4096
179 29 16384 mmcblk0p29 = /mpt ext4
179 30 4096 mmcblk0p30 = empty

I *may* have solved the flashing problem, because the source manifest was flashing to p7. I see Nitro's Domination ROM is formatting and mounting as:

format("ext4", "EMMC", "/dev/block/mmcblk0p27");
mount("ext4", "EMMC", "/dev/block/mmcblk0p27", "/system");

Should that be p26, p13 or something else for the Spectrum?

 

[MicroMod777]

This is good info. If my radio looses 4g, which partition needs to be restored?

 

[vj950]

I have a question: can you do a dd backup without root? and once you do it, assuming it will be in a .img format, what software do you use to see what's inside?

 

[Neph81]

no, DD requires root, and no, it does not turn it into .img format. DD makes a raw rip of the partition. If it's in vfat format, linux can brute force read it when you mount it. if it's ext4, it's a bit harder. If it's an unknown format, good luck reading it.

 

[Neph81]

Also, here is the new list of partitions and names. Not sure why this old one was brought up missing info.

major minor  #blocks  name 
179        0    3526656 mmcblk0 
179        1      32768 mmcblk0p1 = /firmware vfat (modem)
179        2       1024 mmcblk0p2 = secondary boot loader 1 (SBL1)
179        3       1024 mmcblk0p3 = secondary boot loader 2 (SBL2)
179        4          1 mmcblk0p4 (EXT)
179        5       1024 mmcblk0p5 (RPM)
179        6       5120 mmcblk0p6 = ROM update commands - ipth (SBL3)
179        7       5120 mmcblk0p7 = DemiGod Crash Handler/Factory Reset Module (ABOOT)
179        8      10240 mmcblk0p8 = /boot emmc (Boot)
179        9       1024 mmcblk0p9 = trust zone(TZ)
179       10       3072 mmcblk0p10 = (Modem_ST1)
179       11       3072 mmcblk0p11 = (Modem_ST2)
179       12       8192 mmcblk0p12 = /persist ext4    blocks = 4096 (Persist)
179       13      16384 mmcblk0p13 = /recovery emmc (Recovery)
179       14      32768 mmcblk0p14 = /system/etc/firmware/misc_mdm vfat (MDM)
179       15       3072 mmcblk0p15 = (M9K_EFS1)
179       16       3072 mmcblk0p16 = (M9K_EFS2)
179       17       3072 mmcblk0p17 = empty (M9K_EFS3)
179       18       3072 mmcblk0p18 = empty (FSG)
179       19       1024 mmcblk0p19 = empty (SSD)
179       20       8192 mmcblk0p20 = /drm ext4 (BSP)
179       21      16384 mmcblk0p21 = empty (BLB)
179       22      73728 mmcblk0p22 = /tombstones ext4 (Tombstones)
179       23       8192 mmcblk0p23 = /mm ext4 (DRM)
179       24      24576 mmcblk0p24 (FOTA)
179       25       8192 mmcblk0p25 = /misc emmc - This is where the CWM bootloop flag is (MISC)
179       26    1048576 mmcblk0p26 = /system ext4 (System)
179       27     270336 mmcblk0p27 = /cache ext4    blocks = 4096 (Cache)
179       28    1843200 mmcblk0p28 = /data ext4    blocks = 4096 (Userdata)
179       29      16384 mmcblk0p29 = /mpt ext4 (MPT)
179       30       4096 mmcblk0p30 = empty (Grow)

 

[MrDangerous]

mount -o loop /path/file.img /mnt/blah -t vfat

something like that to mount a file.

If you don't know the format, copy the file to a system with a full linux install and use the file command

file /path/file.img and it may say something like
vfat file system
or whatever.