not able to umount :( I have a checkbox checked to extend internal memory and I cant unchek it :(

so I have “BUSY” message everytime

/home/user # umount /dev/mmcblk0p1
umount: cannot umount /media/mmc2: Device or resource busy

/home/user # lsof /dev/mmcblk0p1
gets nothing :(

please take a look at this, I think there is something wrong as I am not too deep into linux yet, I just made using your and other forums instructions - but no luck againe

/ # sfdisk -f /dev/mmcblk0p1
Checking that no-one is using this disk right now …
BLKRRPART: Invalid argument
OK

Disk /dev/mmcblk0p1: 61439 cylinders, 4 heads, 16 sectors/track
Old situation:
Units = cylinders of 32768 bytes, blocks of 1024 bytes, counting from 0

Device Boot Start End #cyls #blocks Id System
/dev/mmcblk0p1p1 0 - 0 0 0 Empty
/dev/mmcblk0p1p2 0 - 0 0 0 Empty
/dev/mmcblk0p1p3 0 - 0 0 0 Empty
/dev/mmcblk0p1p4 0 - 0 0 0 Empty
Input in the following format; absent fields get a default value.

Usually you only need to specify and (and perhaps ).

/dev/mmcblk0p1p1 :0,,b
/dev/mmcblk0p1p1 0+ 61438 61439- 1966047+ b W95 FAT32
/dev/mmcblk0p1p2 :
/dev/mmcblk0p1p2 0 - 0 0 0 Empty
/dev/mmcblk0p1p3 :
/dev/mmcblk0p1p3 0 - 0 0 0 Empty
/dev/mmcblk0p1p4 :
/dev/mmcblk0p1p4 0 - 0 0 0 Empty
New situation:
Units = cylinders of 32768 bytes, blocks of 1024 bytes, counting from 0

Device Boot Start End #cyls #blocks Id System
/dev/mmcblk0p1p1 0+ 61438 61439- 1966047+ b W95 FAT32
/dev/mmcblk0p1p2 0 - 0 0 0 Empty
/dev/mmcblk0p1p3 0 - 0 0 0 Empty
/dev/mmcblk0p1p4 0 - 0 0 0 Empty
Warning: no primary partition is marked bootable (active)
This does not matter for LILO, but the DOS MBR will not boot this disk.
Do you want to write this to disk? [ynq] y
Successfully wrote the new partition table

Re-reading the partition table …
BLKRRPART: Invalid argument

If you created or changed a DOS partition, /dev/foo7, say, then use dd(1)
to zero the first 512 bytes: dd if=/dev/zero of=/dev/foo7 bs=512 count=1
(See fdisk(8).)
/ # mkdosfs /dev/mmcblk0p1
mkdosfs 2.11 (12 Mar 2005)
mkdosfs: /dev/mmcblk0p1 contains a mounted file system.
/ #

The only thing that NB didn’t cover above was for folks who have extended their memory, you need to turn it off first. From the thread at ITT, before running ‘umount’ -
1. Open the Control Panel and click the Memory Icon.
2. UN-check the “extended memory box” (this is what is using the internal card)

(Plus I’d add a brief caveat that sfdisk will wipe everything off your internal card, so if there is anything you want to keep on there better copy it someplace else.)

Considering that I updated my n800 at the same time (well, first actually), it was very confusing when the internal memory on the n810 started saying everything was read only, and the n800 didn’t have a problem. I was despairing I had a flash failure before googling and finding your site here! Thanks all!

Then from xterm:

sudo gainroot
umount /media/mmc2
then
sfdisk /dev/mmcblk0
0,,b

(hit enter until get back to main # prompt)

mkdosfs /dev/mmcblk0p1

— and then reboot the device. Problem solved. Really gotta thank the guy who provided this info for some of us novices (with 30+ years of non-linux o/s and development experience).

Unfortunately, the fsck.vfat command returned:
“dosfsck 2.11, 12 Mar 2005, FAT 32, LFN
Seek to 2055200256:Invalid Argument”.

I rebooted and sought to use the control panel/memory to disable virtual memory (that resides on the IMC). It showed a 64mb VM setup. Unclicking the check box to disable/remove the VM and oddly it said it couldn’t undo the VM. I tried changing it to 128mb VM and that doesn’t work. I’m going to assume it was trying to delete the VM file and couldn’t. I had hoped that after removing the VM I could use file manager to reformat the IMC. Oh well.

So I tried the suggestions above. However, on my windows XP I tried executing “flasherGui.exe -enable-rd-mode” as I don’t have “flasher-3.0-static” there. It just wanted to reflash my system. Apparently this version doesn’t recognize the “-enable…” command line option.

I did however simply install “becomeroot” on my N810. I can execute “sudo gainroot” successfully. However, each time I attempt to execute “umount /media/mmc2″, it fails with a “device busy” message.

I’ve disabled all applets, I uninstalled the “map” application (that puts its maps on mmc2) and the tutorial applet. I only have becomeroot and osso-xterm apps installed. Still the “device busy” persists.