eMMC partition problem

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eMMC partition problem

Unread postby Guso » Mon Jan 26, 2015 1:19 pm

Hi, I just got my C1 a week a go and I'm very happy with it, but it comes with what I think it's a faulty eMMC unit, when it's plugged in it gets recognized but it couldn't read it nor put a partition

I've already tried:
  • dd
  • fdisk
  • gparted
  • win32diskimager
  • diskpart(cmd tool on win)
  • some recovery tool on Caine that i don't remember right now
  • to modify a tool linked on (1) to fit my C1
  • that same tool with a friend's XU on (2)

I'm using a TS RDP5, and already tried with almost 4 different readers

I'm pretty short of ideas right now, anyone has some suggestion?

(1) http://forum.odroid.com/viewtopic.php?f=53&t=969#p68164
(2) http://forum.odroid.com/viewtopic.php?f=53&t=4778
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Re: eMMC partition problem

Unread postby odroid » Mon Jan 26, 2015 2:06 pm

The C1 doesn't need the recovery process because S805 CPU doesn't access the hidden block in the eMMC.

Did you connect the eMMC in this way?
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Re: eMMC partition problem

Unread postby Guso » Mon Jan 26, 2015 2:57 pm

Off course, it wouldn't detect it either way, and with two eMMC to microSD too
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Re: eMMC partition problem

Unread postby odroid » Mon Jan 26, 2015 3:02 pm

Clicky sound should be made when you plug the eMMC module to the reader board to make sure connection.

Check also the direction of reader board. If the direction is wrong, your PC can't detect the storage.
I think you PC could detect the USB card reader without storage media. Right?

Anyway, If it doesn't help, contact "odroid at hardkernel dot com" with a link of this thread.
She will help your RMA process. Sorry for the inconvenience caused.
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Re: eMMC partition problem

Unread postby Guso » Mon Jan 26, 2015 3:35 pm

Well just for record I guess then, this is what happen with it if I try to format the eMMC with fdisk

sudo fdisk -l
Code: Select all
Partition table entries are not in disk order.
Disk /dev/sdb: 14.7 GiB, 15758000128 bytes, 30777344 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x0249138b

Device     Boot Start      End  Sectors  Size Id Type
/dev/sdb1          63 30777343 30777281 14.7G  c W95 FAT32 (LBA)


sudo fdisk /dev/sdb
Code: Select all
Welcome to fdisk (util-linux 2.25.2).                                                                                                                                                                                                     
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.


Command (m for help): o
Created a new DOS disklabel with disk identifier 0x573f9b5d.

Command (m for help): n
Partition type
   p   primary (0 primary, 0 extended, 4 free)
   e   extended (container for logical partitions)
Select (default p): p
Partition number (1-4, default 1): 1
First sector (2048-30777343, default 2048):
Last sector, +sectors or +size{K,M,G,T,P} (2048-30777343, default 30777343):

Created a new partition 1 of type 'Linux' and of size 14.7 GiB.

Command (m for help): w
The partition table has been altered.
Calling ioctl() to re-read partition table.
Syncing disks.


sudo mkfs.ext4 /dev/sdb1
Code: Select all
mke2fs 1.42.12 (29-Aug-2014)
Creating filesystem with 3847160 4k blocks and 962880 inodes
Filesystem UUID: eb1eabf8-5185-4e46-9be4-14cc750395c6
Superblock backups stored on blocks:
        32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208

Allocating group tables: done                           
Writing inode tables: done                           
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done


sudo fdisk -l, again
Code: Select all
Partition table entries are not in disk order.
Disk /dev/sdb: 14.7 GiB, 15758000128 bytes, 30777344 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x0249138b

Device     Boot Start      End  Sectors  Size Id Type
/dev/sdb1          63 30777343 30777281 14.7G  c W95 FAT32 (LBA)


And even when says its FAT it doesn't recognize it anyway, and with any graphical tool either linux or windows says that the partition or partition table its faulty, depends on which sw I use, and doesn't matter if I create a new partition table or just erase the partition "existent" it's the same result

OK I guess I'm gonna RMA it, it's kind of pita but you guys are nice, thank your for your product and service
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Re: eMMC partition problem

Unread postby tobetter » Mon Jan 26, 2015 3:59 pm

@Guso, I am just curious if you have tried to change the partition type on fdisk. Since I found that still the partition type is FAT32 (LBA) and you format it with mkfs.ext4. It does not match.
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Re: eMMC partition problem

Unread postby Guso » Mon Jan 26, 2015 4:06 pm

@tobetter Thats the point, actually on the step 2, I erased all partitions on it, it just doesn't matter what I do on it will ever get the same result at fdisk -l, and at gparted says unrecognized
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Re: eMMC partition problem

Unread postby tobetter » Mon Jan 26, 2015 4:29 pm

Guso wrote:@tobetter Thats the point, actually on the step 2, I erased all partitions on it, it just doesn't matter what I do on it will ever get the same result at fdisk -l, and at gparted says unrecognized

Even if you reinsert your USB card reader while eMMC is inserted once you done to write and exit from fdisk, still it says W95 FAT32? :o
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Re: eMMC partition problem

Unread postby Guso » Mon Jan 26, 2015 4:35 pm

yup, or if I use dd to write zeros or an image on it, or if I rewrite the partition table and doing nothing else, keeps FAT
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Re: eMMC partition problem

Unread postby tobetter » Mon Jan 26, 2015 4:50 pm

Guso wrote:yup, or if I use dd to write zeros or an image on it, or if I rewrite the partition table and doing nothing else, keeps FAT

Thank you for your clarification.
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Re: eMMC partition problem

Unread postby odroid » Mon Jan 26, 2015 4:54 pm

I think some unknown root causes made his card in the read-only mode. :o
Might be a defective eMMC module or reader board.
Or write-protection error in the USB card reader.
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Re: eMMC partition problem

Unread postby Guso » Mon Jan 26, 2015 5:11 pm

Well that's true but I already tried another reader board besides mine, nothing change at all, as well as some other microSD-USB readers...
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Re: eMMC partition problem

Unread postby odroid » Mon Jan 26, 2015 5:42 pm

Yes, I agree.
Please contact us as I told you.
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Re: eMMC partition problem

Unread postby Guso » Tue Jan 27, 2015 1:41 am

Thank you again, I already did but not with hardkernel, I made my purchase with ameridroid, so I wrote them, or should I write hardkernel as well?
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Re: eMMC partition problem

Unread postby odroid » Tue Jan 27, 2015 11:45 am

No..
Contact the distributor if you bought the board from them. :)
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