USB key/pendrive issue - MTCD Android Head Units Q&A

Hi,
My head unit has some issue with the usb drives. It started for some weeks ago, before that, it was perfect. The problem is that, after 1-2 days, the usb drive which is connected, become fails and looses all the data which was on it. So, I format the usb disk on PC, put some music files on it, put in into the head unit, it works, and on the other day there will be no data on the stick and needs to format again in PC. I tried with 3 different sticks, and even with NTFS, FAT32 and exFAT file systems. What can be the problem? Android 8.1.

Hi, not sure sorry, but this is a forum for MTCD/MTCE devices. If you have 8.1 installed then it probably isn't one of these devices unless you have one of the new PX6 or PX30 models.

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[Q] external drive

there is a usb hookup.. so the question is raised, in my mind, can you hook up an external hard drive and thus rendering the 13gb a non issue (at least in the area of video/audio files).
anyone had experience with this?
I've been able to use my flash usb thumb drives without any problems, however when I plugged my WD 1Tb storage drive into the GTab, used ES File explorer to open usbdisk folder but did not see any files listed.
If you want to use a external usb hard drive for movies/files it has to be formated fat32 and it will work.
I have connected with 16gb, 32gb, 64gb and a 500gb Western Digital HD (usb powered). All work fine, but best to NOT remove the USB until the G is placed in sleep mode. There appears to be an unmounting issue that also blows up the app index. Apps can vanish and then not appear again until rebooting.
Archos 101 seems to have a similar issue, so maybe Froyo related.
rushless said:
I have connected with 16gb, 32gb, 64gb and a 500gb Western Digital HD (usb powered). All work fine, but best to NOT remove the USB until the G is placed in sleep mode. There appears to be an unmounting issue that also blows up the app index. Apps can vanish and then not appear again until rebooting.
Archos 101 seems to have a similar issue, so maybe Froyo related.
Click to expand...
Click to collapse
Yeah, I try to put mine to sleep before I pull out my thumb drive as well, but sometimes I forget and as soon as I yank it, the tablet reboots. Ugh!
I bought a 500gb Seagate the same night I got my tablet (been needing a portable hd for a while). It wouldn't work on either the tablet or my PS3. Definitely a format thing. As mentioned earlier, it needs to be formatted Fat32.
Just an FYI, formatting a big hd to Fat32 isn't the easiest thing in the world to do. Windows 7 won't do Fat32 and 95 has a size limit (32 gb maybe?). HP has a program you get download from their site. It works on any make, not just their's. If anyone needs it, I still have it on my PC at home.
J_Bone said:
I bought a 500gb Seagate the same night I got my tablet (been needing a portable hd for a while). It wouldn't work on either the tablet or my PS3. Definitely a format thing. As mentioned earlier, it needs to be formatted Fat32.
Just an FYI, formatting a big hd to Fat32 isn't the easiest thing in the world to do. Windows 7 won't do Fat32 and 95 has a size limit (32 gb maybe?). HP has a program you get download from their site. It works on any make, not just their's. If anyone needs it, I still have it on my PC at home.
Click to expand...
Click to collapse
What is the app called? Work with Vista? I tried formatting a 1gb HD to Fat32 via DOS commands, but failed.
As far as USB, main issue for removing while G is asleep (besides random reboots) is that removing while awake seems to be a main reason apps vanish until a reboot.
If I need to format a big, big hard drive to FAT32, I'll boot up a Linux LiveCD (usually Ubuntu or Knoppix) and use gParted to do it.
rushless said:
What is the app called? Work with Vista? I tried formatting a 1gb HD to Fat32 via DOS commands, but failed.
Click to expand...
Click to collapse
This is a different site but I think it is the same program. One of the comments said it didn't work on Vista business but YMMV. Worth a try.
http://hp-usb-disk-storage-format-tool.software.informer.com/
I went and checked my reformatted portable drive a few minutes ago and the tablet doesn't recognize it. It actually says there are no files in that directory. The drive is working on my pc and PS3. I put a small 4 gb stick in the tablet and it read it fine.
Any ideas?
It recognized my Ipod 120GB classic in disk mode. It also appears to be hot swappedable.
papote18 said:
It recognized my Ipod 120GB classic in disk mode. It also appears to be hot swappedable.
Click to expand...
Click to collapse
It is hardware wise. Software wise, depending on ROM, it can crash your tablet. I try to put it to sleep before pulling my flash drive out. If not, sometimes it will go black and I'll see the boot animation.
I went to the link above looking for the Fat32 > 32 gig tool and it was not available.
If you need this tool, Google for "HP SP27608" and there are a few places where you can download it. HP didn't even have it on their FTP server -- don't know why they have quit offering it?!
Rev
Hi,
Sorry for the late post, but I just got around to trying a bunch of my USB flash drives, and Gtab doesn't see any of them ...
The LED on the drives flashes for a second, then goes off.
Do I have to mount it or something?
Jim
same problem here too. Is there a way to mount a USB drive without formatting? I do not want to loose my collection.
I've never had an issue with my Flash drives (VEGAn or TnT Lite). Are the drives formatted to FAT32?
I have had an issue with a 32GB USB flash drive not showing up on the gtab. I plugged it into my win7. Machine, moved files off, formatted fat, put files back on and it worked fine in the tab.
Another note, using vegan, I never sleep the device to get the drive out. Just wait a second and Yank it. Never been an issue for me.
I have noticed that my flash drives don't mount 100% of the time and sometimes require dis/reconnecting. Also I have a 1tb wd my passport. I formatted the whole drive fat32 and the gtab wouldn't see it. I then formatted just a partition of 120gb in fat32.....still no dice. I then reduced the partition to 32gb nd the gtab sees/reads/writes no problem.
I'm wondering how that other Guy got his 500gb to mount....
I'd like to know how folks have been able to get their external hard drives recognized as well. I have tried stock and tnt lite roms. Also tried several different hard disks all formated fat32. Even repartioned disks to 8GB and still no joy. Flash drives I own all work OK. Just can't use hard disk as yet. Even tried new rom image that came out today, no luck. Am I missing or not doing something?
The usb port does not supply enough power for external hard drives. I tried several and they did not show up in dmesg. When I used one with external power, the drive was seen and the partitions, but was not mounted.
The usb port does not supply enough power for external hard drives. I tried several and they did not show up in dmesg. When I used one with external power, the drive was seen and the partitions, but was not mounted.
Click to expand...
Click to collapse
Thanks, but 2 out of 3 drives I tried use ext power. still no work.
Can anyone who has this working please post what drive they are using?

[Q] Mounting multiple usb drives via hub

So, I have a USB hub and a couple flash drives. Everything "works" fine. I say it like that because the hub functions fine, and the first drive you plug in mounts to /usbdrive just fine. The issue is with the second. When you plug in the second drive, Android sees it in /dev/block as sdb1, and using the Terminal app I can manually mount the drive and use it.
Ideally though, it'd be nice if there was a way for Android to see the second drive and automatically (dis)mount it to something like /mnt/sdcard/external. Is this something that can be configured in the system?
What about the way Android detects and mounts an initial flash drive currently? Does anyone have any knowledge of how that's working currently? Perhaps that could just be duplicated to work with a second one?
This might help.
http://forum.xda-developers.com/showthread.php?t=952456
I'm not sure that's quite right. From what I'm seeing, that tool is designed to let you mount existing media on your device in a way that makes it available to a PC. I'm just wanting the tablet to mount a second USB drive so that it's available on the device itself.

USB OTG Problem [Drive formatting/empty]

Hi, I just bought a universal USB OTG cable, and used it to connect a 32 GB pen drive (FAT32 filesystem) to my OPO (05Q, rooted). At first it apparently detected it, but since the drive was totally empty I had no way to confirm that, so I unplugged the drive and connected it to my PC, and put some videos on it. The computer gave a me a list of files with strange simbols as name, but I thought it was something done by the phone, given the presence of the directories "Android" and "LOST.DIR" (even though I wasn't allowed to open them). Then, I plugged the drive back to the phone, and it was detected without any problem, but it was completely empty, and not even a single bit of data could be found anywhere. I repeated the process three times, always with the same results. Does someone have a solution for this annoying issue?
Thank you very much.
Edit: Problem solved, it was an issue of the USB drive.
Sent from my OnePlus One

OTG Support

Hello guys,
Just got it a few days back.
Now i tried to connect my 1tb, 2tb and 5tb HDD to the phone via a type c to type a adaptor.
It detected all but always asked me to format it first before using. I cannot afford to lose th precious data in those hdd.
I am just happy to know that it detected the 5tb HDD also.
My question is, what file format does it support in order for me to try to take a back up of my hdd and turn it into one of those file systems so that it can be read.
I stopped using computers and laptops a few years back. Hence im kinda excited with this new discovery.
Also, will the file format system be readable in the comouters (macs and windows format)
Thanks in advance.
Looking forward for a simple quick solution which doesnot wipe out my hdd data... ?

Tomtom Go 620/630/720/730/920 Fat32 OTG USB working but can't recognize the data

Hi,
I have old TomTom PNAs like the GO 730, I tried to connect to my Android phones with my OTG adapters and cables (I tried several).
The TomTom PNAs are recognized but the phones can't access to the PNAs' data (although they're FAT32). The phones (Android 11) ask me if I want to format my TomToms. I don't have the issue between Windows and the TomToms.
Is it some sort of an Android bug/lack off functionality from Android?
Thank you,

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