Related
What does this notification really mean? I'm running CM7 off an 8G SanDisk. The /sdcard filesystem appears intact, it mounts properly on CM7 and Linux, but this notification won't go away.
fsck on Linux reports no problems.
Might something be confused about partitions? I can't mount /emmc for some reason, CWM can't mount it when I tell it to format it, and USB mode doesn't export it, although it looks like it's trying to; Linux reports a /dev/sde (along with /sdcard at /dev/sdd), but it can't be used:
Code:
# fsck /dev/sde
e2fsck: No medium found while trying to open /dev/sde
Any ideas?
Thanks!
Dennis
Fixed it!
To recap, I'm running CM7 from SD. I was getting a "Damaged SD Card" notification, and my /emmc vanished, and it wouldn't export via USB ("No media present" was the error reported by Linux, although /dev/sde was created), and CWM couldn't format it for me (why not?).
Both were apparently from the same cause. I repaired mmcblk0p8, and now my /emmc is back and the Damaged notification is gone.
So, if you're getting that notification, it may not be about your SD card!
Details: I couldn't use dd from Linux, but I could dd if=...blk0p8 within Terminal Emulator. My busybox doesn't have mkfs.vfat, so I used dd to copy /boot onto the partition; this gives it a (small but sane) filesystem. I rebooted to get /emmc mounted properly (check fstab.vold for the gory details), connected the cable to my Linux PC, checked that the expected contents were on /dev/sde, unmounted it (command line, not via GUI) and ran sudo mkfs.vfat -I -n MyNookColor /dev/sde from the Linux command line. All is now well.
i hv the same issue but since i'm a noob at nook color and i dont knw anything abt linux... i hv no clue what your are talking about...
it would be a gr8 help to me and others who are not well versed with linux, if you could tell me exactly what did u do to fix this problem.
please help me with this issue.
ty
sd
stavan_d said:
i hv the same issue but since i'm a noob at nook color and i dont knw anything abt linux... i hv no clue what your are talking about...
it would be a gr8 help to me and others who are not well versed with linux, if you could tell me exactly what did u do to fix this problem.
Click to expand...
Click to collapse
Android is just as much a Linux system as Ubuntu or Fedora.
This applies if and only if Settings/Storage claims that you have no /emmc or /mnt/emmc, and if you've installed CM7 to emmc. Read the headers carefully.
Start Terminal Emulator.
In this window, type su. The prompt changes to #.
Type df.
If there's a listing for /mnt/emmc or just /emmc, try something else; this isn't for you.
We're going to reconstruct /emmc by copying /boot onto it. THIS WILL ERASE /emmc!!!
Type VERY CAREFULLY:
dd if=/dev/block/mmcblk0p1 of=/dev/block/mmcblk0p8
That's blk zero pee one and blk zero pee eight.
This will grind away for quite some time.
When it's done, reboot.
If you still get the notification, you have some other problem.
You now have a tiny /emmc instead of the 5G partition that should be there. Plug the cable into your PC, enable USB mounting, and verify that one of the volumes looks like a boot partition. If you run a Linux PC, check the device name (mine was /dev/sde, yours is probably different), unmount it, and do the mkfs I showed before.
If you run Windoze, tell it you're done with the /boot drive (like you would do with a thumb drive), and format that device (E:, F:, whichever it was) by (IIRC) right-clicking on it in an Explorer window and selecting Format. Again, SELECTING THE WRONG DEVICE WILL SCREW YOU UP. I am not responsible.
If you're not sure about ANY of these steps, please get expert local help.
Good luck!
Sent from my NookColor using XDA Premium App
i m booting cm7 from the sd card... and settings/storage/additional storage/mnt/emmc Unavailable...
so how do i fix this...
also when i plug NC in boot OS it shows 2 partitions, 1.undefined and 2. 4.98gb... instead of 5gb single partition originally present...
Can I change the mount point of the External SD card (microsd) from
/mnt/external_sd
to
/mnt/sdcard/MicroSD
I tried changing the entry in vold.fstab to no help. it wasn't mounted to /mnt/external_sd but it also wasn't mounted to the MicroSD folder i made on /mnt/sdcard
This would let any program that doesn't have the ability to handle the external SD card to be able to access it as it wouldn't know where it was. I could then do this to USB drives plugged in as well.
Nova5 said:
Can I change the mount point of the External SD card (microsd) from
/mnt/external_sd
to
/mnt/sdcard/MicroSD
I tried changing the entry in vold.fstab to no help. it wasn't mounted to /mnt/external_sd but it also wasn't mounted to the MicroSD folder i made on /mnt/sdcard
This would let any program that doesn't have the ability to handle the external SD card to be able to access it as it wouldn't know where it was. I could then do this to USB drives plugged in as well.
Click to expand...
Click to collapse
This might not exactly be the route you wanna take, but have you tried adding a symlink? Might do the trick, then again, I'm having a little issue with the same thing right now. Looks like this has been a popular subject lately
symlinks seem to be inoperable in HC.
Found this on another forum
Have you tried "bind" mounting?
Doesn't wok for me as I have a stock (unrooted) transformer...
cd /mnt/sdcard
mkdir MicroSD
mount -o bind /mnt/external_sd /mnt/sdcard/MicroSD
Click to expand...
Click to collapse
Works fairly well. Doesn't effect the storage count for the internal memory however. if we could actually mount it to a folder inside the scdard mount then it may show up as extra space, but i kinda doubt that bit.
Those system files are overwritten on each reboot so you have to "mount -o bind" on every reboot.
If you find a way to make this mount point permanent let me know, I am looking for a way as well.
If you're rooted, I think USB Mount All did this.
powercat_ said:
Those system files are overwritten on each reboot so you have to "mount -o bind" on every reboot.
If you find a way to make this mount point permanent let me know, I am looking for a way as well.
Click to expand...
Click to collapse
What system files? Its simply a mount point created and handled in memory. its never added to a file. I forget what the start up command file is in linux that is the sister of DOSs Autoexec.bat. It would need to be added to that as the last command. Now i have read this is a risky command to run as it can create a endless loop if something attempts to scan the directories it can run into a recursive loop. Now I believe this is because most instances of this command tend to be used to bring a directory onto the desktop thats a few steps above it. Considering that the way I am using it is to link a directory that is outside the scope of another, it shouldn't ever cause this and be a pretty safe way to do it. The BIND command creates a hard link between the two locations. the /mnt/sdcard/MicroSD is a directory I created. when I bind it to the /mnt/external_sd directory the files appear in both places at the same time as MicroSD is simply a... tunnel as it were into External SD. But the programs are convinced its MicroSD. So those that can't use the external sd slot now can through this "tunnel". The same trick can also be applied to the directory for the USB thumb/flash drives.
Just create a directory for it on /mnt/sdcard
fermunky said:
If you're rooted, I think USB Mount All did this.
Click to expand...
Click to collapse
why pay when you can enter a command and its done?
Yes, mount -o bind works, but if you reboot, the mount point is no longer there.
Sure, we can add an entry to fstab, but the file is overwritten by a reboot
the autostart file is init.rc, which is overwritten by a reboot as well, so that rules out using it to auto mount this bind.
let me know if you find other information as I would very much like this to work.
FYI I started a thread about this command a few days back but never got any pertinent information:
http://forum.xda-developers.com/showthread.php?t=1287522
(this was before 3.2 when you couldn't access the SD card from usb)
Nova5 said:
why pay when you can enter a command and its done?
Click to expand...
Click to collapse
Because it is only a few bucks, and it will do it for you without having to manually do it. I know it's quite a simple task, but I say best out of sight/out of mind.
its overwrites those huh? that bites..
fermunky said:
Because it is only a few bucks, and it will do it for you without having to manually do it. I know it's quite a simple task, but I say best out of sight/out of mind.
Click to expand...
Click to collapse
Just takes a bit to track where we can stick the commands to get an auto start. I may make a simple script file to leave on the home screens. tap and done.
Okay it seems the location where the init.rc is stored is volatile. I created a test file in there and rebooted the tablet, file is gone. So its less overwriting and simply copying out of its hidden location to a usable one. sdcard in there is just a mount point for the actual hardware address location of the sdcard. So if we want to get the autostart we would have to discover where HC pulls that data from on boot.
Bind will fail if the location that actually holds the data is not present/ready. usb_storage is more affected by this as a user doesn't normally leave a flash drive in the port. Script manager can auto-execute a script on boot. Works well enough.
hmm...
It appears if you remove the usb drive after making the bind, the bind is broken. So while its workable, its not perfect. Of course since the microsd card is rarley removed, this isn't much of an issue. If we could get the script to also run on insertion of the USB drive that would then make it work better.
SCript Manager allows one to create a direct shortcut to execute a specific script. So you can swap USB drives, tap the script icon and then access the script through the bound directory.
I use the following program created by RubberBigPepper from an alternative russian site about android apps and devices.
Any interesting effect I've noticed, any time the script runs it creates a new mount entry for the bind command, even if that bind already exists. OfficePro5 shows this by listing MicroSD for each bind entry. So I had 13 entries of MicroSD as it ran that many times, due to a setting I shouldn't have checked... Run on Net Change. But it pointed out this interesting effect.
I now see the need for this as one of my apps does not natively see the ext sd card.
OK I tried the apk above and it does not seem to work. I get a folder called ex_sdcard but it is empty and does not reflect the sd card contents.
Nova, you found another way yet you could share, or do I just need to manually create symlinks after every boot?
mountmicrosd.sh
Code:
# Note : Super user required. Your Tablet MUST be rooted!
# Removing the card will disrupt the bind. And Require running script again when plugged back in.
echo Breaks any existing Bind mount to avoid creating duplicate Bind entries. a "failed" response is acceptable as is no response.
umount /mnt/sdcard/MicroSD
echo execute Micro SD mount - card must be plugged in or Invalid Argument error will occur.
mount -o bind /mnt/external_sd /mnt/sdcard/MicroSD
Place the above in a text file with the extension .sh Download from the Market a program called Script Manager. Place the sh file in your SD card root. Run script manager, select that file and check two boxes. Run on Boot, Run as Root. Also create the directory of "MicroSD" Just as its typed. Linux is very caps sensitive. now every time you boot it will automatically run the script and bind the ExSD to the MicroSD directory.
This one will do the USB drive.
mountusb.sh
Code:
# Note : Super user required. Your Tablet MUST be rooted!
# Removing the drive will disrupt the bind. And Require running script again when plugged back in.
echo Breaks any existing Bind mount to avoid creating duplicate Bind entries. a "failed" response is acceptable as is no response.
umount /mnt/sdcard/USBDrive
echo execute USB Drive mount - drive must be plugged in or Invalid Argument error will occur.
mount -o bind /mnt/usb_storage /mnt/sdcard/USBDrive
Create a widget with ScriptManager to have a touchable icon on your screen to run this one. Note it must have the folder "USBDrive" created on the sdcard.
It is unimportant if you use the same filename.sh i did. That is just so I knew at a glance what it does. # is a comment and Echo prints the text following it to the screen. I found a way around the mutiple bind entries by simply unmounting it before making the mount bind. You might see a Failed error, this is just fine. it just means there was no mount for it to undo on its first run. this will be more helpful on the USB drive script than the MicroSD card one.
Very cool, Nova5!
Thanks for taking the time to research it further.
I tested your solution and it works fine!
I updated it with a fix to prevent the multiple entries. You'll need to update your files to reflect the changes I made. a reboot will be the simplest way to ensure it starts with a clean slate. Notice I removed the comment about Running it once only, due to the umount command preceeding the mount command. This removes the bind from memory and then when its created again you don't have the problem of 13 entries of MicroSD in OfficePro like I ran into.
Alright, I think its as good it is going to get. You could put them in the same files but for simplicity and being able to swap USB drives without affecting the ExSD card two files is best.
Wait... debug time. I goofed something.
Okay fixed up and working right. Remember what I mentioned about linux and capitals? oops. Echo is not echo.
Shucks, im not rooted.
Can I have external card mounted as ext2? I have files names not supported by fat and sync'ed with dropbox
Yes, you can but afaik there is no easy way to do this.
I formatted my sdcard to ext2 (because I wanted to put large file (image for wikipedia offline) on my sdcard).
I formatted the beginning (~30MB) of my sdcard to fat32 so that the Nook detect the sdcard and does not trigger an error and the remaining part to ext2.
Then I used a script that mount manually the ext2 partition to /sdcard on boot.
This generally works but I have sometimes a few bug in some applications, especially when I connect and disconnect my Nook to my computer...
The best solution would be to find a way so that Android can automount a ext2 partition by itself but I don't know how to do it.
Instead of using the whole card I partitioned the first 4gb as fat16 (msdos) and then set the rest to ext3. When the fat16 space runs out I'll look into making some sort of script to try to mount the second partition. At the moment with the card acts like a normal 4gb card.
is it possible to repartition the nook to be able to use the space that b&n reserves for its contents? I heard that the space for our files is just 250 mb.
user4242 said:
is it possible to repartition the nook to be able to use the space that b&n reserves for its contents? I heard that the space for our files is just 250 mb.
Click to expand...
Click to collapse
yes of course. If you're used to linux repartitioning and the dd command then it's a breeze. If you're a Windows user who've never done partitioning or disk imaging then you can easily mess up.
I'll assume the former.
It's just a case of:
boot with a noogie.img that you've written to a sdcard (root of card, not partition 1)
then plug it in
now you can see all the nook partitions like it's an external USB drive and fdisk, cfdisk, partitionmagic or whatever you want
Obviously you're gonna want to backup first because if you mess up the only way to restore would be asking one of us off this forum to break the distribution laws and send you a 2gb (or whatever it is) image.
All the details on this forum
Has someone tried editing /system/etc/vold.conf to get a ext-formated SD-Card mounted?
mali100 said:
Has someone tried editing /system/etc/vold.conf to get a ext-formated SD-Card mounted?
Click to expand...
Click to collapse
I checked, I had modified it adding a line "partition 2" in the section "volume_sdcard2" so that Android does not show the message "SD card blank or has unsupported filesystem".
But I couldn't make it mount a ext2 sdcard itself. (if you know how to do it without using another script, I'm interested)
Time to resurrect this thread.
FAT is ugly. File timestamps are in local time (whatever that means, summer? winter?).
The Nook vfat implementation has problems with caching in and out directory info on vfat
and intermittently changes all the modify timestamps by 1, 4 or 5 hours.
This can play havoc if you are trying to keep things synchronized by filetime.
I've decided to have my SD card be ext3
Our volume demon, /system/bin/vold (which is ancient) uses /system/etc/vold.conf to configure automounting.
It presumes that all volumes are vfat.
It seems from a brief look inside that it does handle ext2 and ext3 somehow.
There is also the question of getting it to automount USB drives.
The easiest solution to ext3 on the SD card is to make it non-removable.
First, delete the second section out of vold.conf that relates to the SD card.
Then edit init.rc:
Code:
mkdir /sdcard 0777 system system
...
mount ext3 /dev/block/mmcblk1p1 /sdcard nosuid nodev noatime nodiratime uid=1000,gid=1015,fmask=117,dmask=007
chown system sdcard_rw /sdcard
chmod 0770 /sdcard
If you feel like having 12 partitions on your SD card you can.
That leaves vold only handling the mounting of /media
This exists so that you can serve /media as USB Mass Storage.
You could have /media be a fixed mount by doing what you just did to the SD card.
The only hiccup there would be the Adobe Digital Editions wants to see /media as UMS.
Note: To edit init.rc, download bootutil from the signature, extract, edit and replace init.rc in uRamdisk.
Make sure that you have a backup and a recovery!
Note: All of the above changes to init.rc are wrong.
I can get it to mount in a shell, but not in init.rc
Whoops.
Oops, this thread has been forgotten.
Yes, auto-mounting ext3 SDcards has been solved.
See: http://forum.xda-developers.com/showthread.php?t=2184495
Hello,
Complete noob here and I am not ashamed to admit it. I did create a bootable sd card with CM7 stable on it and the card is partitioned into 4 spaces. The boot space only has a capacity of 117.63 MB, while the 4th partition named CM7 SDCARD has a whopping 28.21GB available.... 112.14MB used..... Im guessing for application. Anyways, I am trying to put books and videos on my NC and there is not enough space that is accessible. Any way to make that boot partition spave larger? Maybe move some of the extra space from the 4th partition? I have EASEUS Partition Master but I have been unable to get it to work..... Any help is greatly appreciated.
I did search for a post like this but did not find any answers which I understood.
Thanks in advance,
What is it that you are trying to do?
Homer
I am trying to put books on my sdcard that I downloaded on my computer for school. When I copy to the directory boot/myfiles/books it says that there is not enough space. So I want to enlarge the size of the boot partition
After you burn the partition image using Win32Image, the size of the boot partition is roughly 117mb. At this point use EASEUS partition to expand the boot partition to the size you want. In my 32gb SD card, I created a 16gb partition. Then I copied CM7.1 and Gapps to the partition, booted NC and CM7.1 was set up in the remaining space, with /data at 5gb and /media at 9gb.
Would you then access the files while booting from the SDcard or internal memory (eMMC)?
If you want to see them when booting from SDcard, don't put them on /boot as you have found out there is not much room. You want them on partition 4. Remember that Windows will not mount partition 4 without some heroic efforts. I use either NookColor UMS (free, see here) or WiFi Explorer Pro (paid, check either Android or Amazon Market).
If you want to see them when booting from eMMC, that is slightly more advanced. You don't have to root, but there is a file on the system on eMMC that needs to be edited to mount partition 4 rather than partition 1. It would take some time to search for it, but someone posted a guide a while back. Search for something like sharing SDcard and/or editing vold.
Homer
Ok...... So I got the boot partition resized to around 20gb and I have copied the books from my hd to the sd card E:\My Files\Books...... Problem is I now cannot acess them when I boot CM7..... Any fix to this or will I have to boot from the eMMC?
Ok....
You're making the easy stuff hard...
You want a large partition that is accessible by CM7 running off the SD and your windows PC. Like Homer said, it is nigh impossible to get windows to mount secondary partitions off of an SD card reader. What he forgot is that CM7 allows you to access partitions 3 and 4 over USB. CM7 can access the boot partition but most apps won't look there and it won't be accessible over USB.
I would recommend that you restart from scratch. Allow verygreens installer to set up the default partitions. Plug your device into your PC and transfer your pdfs to partition 4 that-a-ways. That way you won't have to remove the sd card anytime you want to access your pdf folder.
Even when you plug the CM7 booted NC into your PC, you still need to mount the /sdcard partition to Windows. I find it is easiest to use NookColorUMS on the NC to mount that partition, see above. Otherwise, when you plug into the Windows machine you only get /boot mounted.
Homer
Homer_S_xda said:
Even when you plug the CM7 booted NC into your PC, you still need to mount the /sdcard partition to Windows. I find it is easiest to use NookColorUMS on the NC to mount that partition, see above. Otherwise, when you plug into the Windows machine you only get /boot mounted.
Homer
Click to expand...
Click to collapse
Hmm, when I plugged a nook running CM7 from SD card, I get access to /media and /sdcard. I had to move the gapps.zip from /sdcard to /boot manually using a file explorer.
I'm offering an apology to gall and Homer first so pls don't jump on me.
You guys harden a simple issue and confusing the OP.
To OP,
I assume you got a 32GB uSD card, using verygreen's image. You got 117MB on boot.
LEAVE the boot partition ALONE. The only thing you should put there are the ROM (CM7 zip file) and the GApp zip file. NOTHING ELSE. Your music/ebook/video, etc. should NEVER go there. You will place them in the left-over storage created by CM7, normally called CM7SDCARD.
How do you access CM7SDCARD so that you can transfer files over?
The only way is
+ NC on
+ connecting NC to PC (windows)
+ look at the NC notification bar, usb icon should be displayed
+ tap on it, enable usb mass storage (connect to PC for file transferring....)
+ Windows PC should by now recognized the CM7SDCARD and ready for use.
That's the ONLY WAY and the correct way.
If you use that bootable CM7 uSD and plug directly into PC, you only see the boot partition which only 117MB. Again, the boot partition is NOT meant for personal stuff.
What may confuse some people is that when they plug the device into PC then it does not by default auto-mount so you don't get a drive in the PC until you use the USB notification and turn on USB storage.
For non-techie users I normally install the automount USB app from JRTStudio so the drive pops up straight away on the PC and there is no confusion over this point.
The other good reason for using the USB (or alternatively wireless connections like ES File Explorer) is that it reduces taking the SD card in and out and any risk of damaging the socket.
My apologies, I never checked out the USB notification. I sort of ignored it. It seems a handy implementation of the basic functionality of NooKColorUMS.
What is MyNOOKColor though? CM7 SDcard is the one I typically use. Nevermind: it is the eMMC. I never bothered with that one since going to SDcard boot.
Homer
I've given up on reformatting the internal memory as EXT4 (my last post). However now, I want to mount an external SD card that is EXT4 (or any file format that has UNIX permissions). I can't get my device to mount the card, it says the filesystem is unsupported. Now, that's bull**** since Android has built in support for EXT. After searching threads here on XDA and Google, and even purchasing EzyMount as recommended, I can't get it to mount. I've tried BusyBox and mount commands (as root), with various errors such as "mount operation not supported on transport endpoint". I'm at my wit's end by now, trying to get some filesystem which has support for symlinks and UNIX permissions... any ideas?
kcattakcaz said:
I've given up on reformatting the internal memory as EXT4 (my last post). However now, I want to mount an external SD card that is EXT4 (or any file format that has UNIX permissions). I can't get my device to mount the card, it says the filesystem is unsupported. Now, that's bull**** since Android has built in support for EXT. After searching threads here on XDA and Google, and even purchasing EzyMount as recommended, I can't get it to mount. I've tried BusyBox and mount commands (as root), with various errors such as "mount operation not supported on transport endpoint". I'm at my wit's end by now, trying to get some filesystem which has support for symlinks and UNIX permissions... any ideas?
Click to expand...
Click to collapse
you fully rooted with custom kernel or only with rdlv etc?
First you gotta figure out how to mount this damn thing, gotta be possible.
Then you need to get this done on bootup, either in init.rc or init.d or smth.
You probably just use wrong commands? But I could be wrong, didnt try that yet but would also be interested. Having the file permissions also on SD would be nice, but it could cause trouble with mtp maybe?
zroice said:
you fully rooted with custom kernel or only with rdlv etc?
First you gotta figure out how to mount this damn thing, gotta be possible.
Then you need to get this done on bootup, either in init.rc or init.d or smth.
You probably just use wrong commands? But I could be wrong, didnt try that yet but would also be interested. Having the file permissions also on SD would be nice, but it could cause trouble with mtp maybe?
Click to expand...
Click to collapse
I am rooted, but stock ROM and kernel. MTP is for connecting to a computer? If it is, I don't need that. I have tried
mount -rw -t ext4 /dev/block/mmcblk1p1 /storage/extStorageCard
and variants switching the flags and options.
Interesting... I just typed that command in to make sure I didn't make any typos.... and my phone crashed and rebooted. I typed it again to see if it would cause another crash and it appears to have mounted the card! Whwn I type "df" at the prompt it now shows a 28.6 GB filesystem at that location, which has to be my sd card.
Why, how, I don't know. It works, it's all I can say.