[U-Boot] "Writing to MMC(%d)... failed"

[Nathan]

Wow, that came out as a real mess.
I used Outlook.com to compose that message.
Anyone experience that and can recommend how I can clean it up?
I see that I composed using "Rich Text".

I'll try to redo it in my reply here using "Plain Text":

"saveenv" won't write the environment out to disk.

$ sudo dd if=/dev/zero of=/dev/sde seek=1 bs=512 count=3999
  //wiping out area just to make sure no garbage is picked up.
$ sudo dd if=bl1.HardKernel of=/dev/sde seek=1 iflag=dsync oflag=dsync
$ sudo dd if=bl2.HardKernel of=/dev/sde seek=31 iflag=dsync oflag=dsync
$ sudo dd if=u-boot-dtb.bin of=/dev/sde seek=63 iflag=dsync oflag=dsync
$ sudo dd if=tzsw.HardKernel of=/dev/sde seek=2111 iflag=dsync oflag=dsync

Fail:
git://git.denx.de/u-boot.git
commit 47d8ae4069b47ce966c0c5e0d8dd041e69ee1f86
*****
U-Boot 2015.04-rc2-00081-g47d8ae4 (Feb 25 2015 - 12:12:40)

CPU: Exynos4412 at 1000MHz
Model: Odroid based on Exynos4412
DRAM:  2 GiB
Board PMIC init
MMC:   SAMSUNG SDHCI: 0, EXYNOS DWMMC: 1
*** Warning - bad CRC, using default environment

DFU alt info setting: done
Net:   No ethernet found.
Hit any key to stop autoboot:  0
** Unrecognized filesystem type **
** Unrecognized filesystem type **
** Unrecognized filesystem type **
Bad Linux ARM zImage magic!
Odroid # saveenv
Saving Environment to MMC...
Writing to MMC(0)... failed
Odroid # mmc info
Device: SAMSUNG SDHCI
Manufacturer ID: 3
OEM: 5344
Name: SU08G
Tran Speed: 50000000
Rd Block Len: 512
SD version 3.0
High Capacity: Yes
Capacity: 7.4 GiB
Bus Width: 4-bit
Erase Group Size: 512 Bytes
Odroid # mmc list
SAMSUNG SDHCI: 0 (SD)
EXYNOS DWMMC: 1
Odroid # mmc part

Partition Map for MMC device 0  --   Partition Type: DOS

Part Start Sector  Num Sectors  UUID    Type
** Can't read partition table on 0:0 **
Odroid # mmc hwpartition check
Partition configuration:
  No enhanced user data area
  No GP1 partition
  No GP2 partition
  No GP3 partition
  No GP4 partition
eMMC >= 4.4 required for enhanced user data area
Failed!
Odroid # version

U-Boot 2015.04-rc2-00081-g47d8ae4 (Feb 25 2015 - 12:12:40)
armv7l-unknown-linux-gnueabihf-gcc (GCC) 5.0.0 20150221 (experimental)
GNU ld (GNU Binutils) 2.25.51.20150221
Odroid # fstype mmc 0:0
 ** ext4fs_devread read error - block
Failed to mount ext2 filesystem...
** Unrecognized filesystem type **
Odroid # bdinfo
arch_number = 0x000010C1
boot_params = 0x40000100
DRAM bank   = 0x00000000
-> start    = 0x40000000
-> size     = 0x10000000
DRAM bank   = 0x00000001
-> start    = 0x50000000
-> size     = 0x10000000
DRAM bank   = 0x00000002
-> start    = 0x60000000
-> size     = 0x10000000
DRAM bank   = 0x00000003
-> start    = 0x70000000
-> size     = 0x10000000
DRAM bank   = 0x00000004
-> start    = 0x80000000
-> size     = 0x10000000
DRAM bank   = 0x00000005
-> start    = 0x90000000
-> size     = 0x10000000
DRAM bank   = 0x00000006
-> start    = 0xA0000000
-> size     = 0x10000000
DRAM bank   = 0x00000007
-> start    = 0xB0000000
-> size     = 0x0FF00000
current eth = unknown
ip_addr     = <NULL>
baudrate    = 115200 bps
TLB addr    = 0xBFEF0000
relocaddr   = 0xBDE43000
reloc off   = 0x7A043000
irq_sp      = 0xB8E3D860
sp start    = 0xB8E3D850
*****
Ignore the "unrecognized filesystem type" stuff. I'm using ext4.
mmc hwpartition only used for eMMC?

Success:
https://github.com/hardkernel/u-boot.git
commit 33e05ffb159141b640571e91470172d83a2a1273
*****
U-Boot 2010.12-svn (May 12 2014 - 15:05:46) for Exynox4412


CPU: S5PC220 [Samsung SOC on SMP Platform Base on ARM CortexA9]
APLL = 1000MHz, MPLL = 880MHz
DRAM:  2 GiB

PMIC VERSION : 0x00, CHIP REV : 3
TrustZone Enabled BSP
BL1 version: 20121128

Checking Boot Mode ... SDMMC
MMC Device 0: 7580 MB
MMC Device 1 not found
*** Warning - using default environment
USB3503 NINT = OUTPUT LOW!
ModeKey Check... run normal_boot
No ethernet found.
Hit any key to stop autoboot:  0
Exynos4412 # wipeenv  0
spot on!
0: wipeenv
1:0
MMC Device 1 not found
Wiping u-boot env at MMC: 0
Exynos4412 # mmcinfo
Device: S3C_HSMMC2
Manufacturer ID: 3
OEM: 5344
Name: SU08G
Tran Speed: 0
Rd Block Len: 512
SD version 2.0
High Capacity: Yes
Size: 0MB (block: 7580)
Bus Width: 4-bit
Boot Partition Size: 0 KB
Exynos4412 # saveenv
Saving Environment to SMDK bootable device...
done
*****