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Old 02-27-2011, 06:45 AM   #1
dockerslund
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USB flash drive not working in TV or portable stereo

For some reason some of my USB flash drives doesn't work when plugged in to the TV's USB input (LG) and neither to my Philips Soundmachine (a portable stereo).
I'm being told there's an error with the USB.
But I can easily plug it into my Mac (and even a PC) without any problems.
I've formatted it as FAT32.
One of my USB flash drives works absolutely fine with the TV and the portable stereo. It's also formatted as FAT32.
Both USB flash drives are USB 2.0.

I've got 4 flash drives.
Three of them aren't working with the TV and portable stereo.
All formatted with FAT32.

What can be the problem?
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Old 02-27-2011, 07:39 AM   #2
kastor
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Well, I had the problem once. Sometimes there is no partition table on the flash drive, so you need to create one:
If you try to look at it with fdisk (the Linux version works better for me, it didn't work on OS X) you should have the following:
Code:
root@xxxx:~# fdisk /dev/sdb

The number of cylinders [...]

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1   *           1        2686     7864304    b  W95 FAT32
but if you just have /dev/sdb with no number after, it means that you don't have partition table. You may need to create one (look at tutorials on how to use fdisk).
On computers, it doesn't matter, but some simple usb stack expects a partition table, other don't expect any... So if you have one, you may try to remove it. Of course backup all your data before...

I hope it helps
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Old 02-27-2011, 04:52 PM   #3
dockerslund
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Thanks for your reply.
I don't use Linux unfortunately.
I'm running Windows 7 through Fusion 3 too. Is there any way to do it through Windows, if it doesn't work on OSX?
I've had a look at Fdisk on Windows 7, but it doesn't look anything like the stuff you're referring to.
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Old 02-28-2011, 03:00 AM   #4
GavinBKK
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Disk Utility can create partitions on the flash drives easily. Or have I missed something?
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Old 02-28-2011, 04:10 AM   #5
SirDice
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Quote:
Originally Posted by GavinBKK
Disk Utility can create partitions on the flash drives easily.

Yes, just make sure you pick FAT32, not NTFS.
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Old 02-28-2011, 09:46 AM   #6
agentx
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You must also make sure that the Partition Map is MBR (Master boot record not GUID or APM) for it to be recognised by many third party devices.
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Old 03-01-2011, 10:19 PM   #7
dockerslund
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Thanks guys!
Your input was valuable and yes, it's working now.

If anyone else is having the same problem, just follow this:

Launch Disk Utilities, located at /Applications/Utilities/.

In the list of devices, select the hard drive or device whose partition scheme you wish to change. Be sure to select the device and not any of the underlying partitions that may be listed.

Click the 'Partition' tab.

Disk Utility will display the volume scheme currently in use.

Use the Volume Scheme dropdown menu to select one of the available schemes. Please note: This is the volume scheme, not the partition scheme. This dropdown menu is used to select the number of volumes (partitions) you want to create on the drive. Even if the currently displayed volume scheme is the same as what you wish to use, you must still make a selection from the dropdown menu.

Click the 'Option' button. The 'Option' button will only be highlighted if you chose a volume scheme. If the button isn't highlighted, you need to go back to the previous step and choose a volume scheme.

From the list of available partition schemes (GUID Partition Scheme, Apple Partition Map, Master Boot Record), select the partition scheme you wish to use, and click 'OK.'
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