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monty77

macrumors 6502a
Original poster
Mar 4, 2005
594
173
UK, South Coast
I have a 4Gb Seagate MicroDrive that I want to use to store mp3s .. it's Windows FAT16 formatted (not FAT32) and each time I connect it makes the finder lock up until I disconnect the device. It's connected using a USB CF/MD adapter.

I've had a google and OS X should support read/write to FAT16/32 so what gives? Anyone else have this problem?

Cheers!
Adam
 
Is the drive powered by the USB port only, or do you use an extrenal power source? I have to connect my external 2.5 drive to both USB ports on my PB to make it work.
 
Temujin said:
Is the drive powered by the USB port only, or do you use an extrenal power source? I have to connect my external 2.5 drive to both USB ports on my PB to make it work.

It is... I suspected it might be a power issue too but it behaves the same in both a powered hub and a USB port in the back of the iMac.

Cheers,
Adam
 
I have a small USB flash drive that's FAT16 formatted, and that works flawlessly (even after a trip in the washing machine ;)), so I second (or third) that it might be a power issue... or, less chance but worth looking into, maybe a bad disk? Have you tested it on any other machines (Mac or PC)?
 
Mitthrawnuruodo said:
I have a small USB flash drive that's FAT16 formatted, and that works flawlessly (even after a trip in the washing machine ;)), so I second (or third) that it might be a power issue... or, less chance but worth looking into, maybe a bad disk? Have you tested it on any other machines (Mac or PC)?

Works with Windows laptop just fine, not tried another Mac yet ... might try another MD>USB adapter though.

Cheers,
Adam
 
Have you tried pulling up Disk Utility when its pluged it to see if it can be formatted. Another thing is to check your System Info ... under the USB tab.. it should show up if it fully reads it (getting enough power).
 
monty77 said:
...
I've had a Google and OS X should support read/write to FAT16/32 so what gives? Anyone else have this problem?
Cheers!
Adam
It is likely a problem supplying power to the key, or perhaps it is damaged. Once you get the data off, you might consider formatting the drive in FAT32. That will give you longer file names with out too much loss of space on your drive.

File Allocation Table, sometimes instead of Table people use Tree. This is a Microsoft protocol that has become the De facto standard. It can be used by most OSs, and Microsoft hasn't made it proprietary, unlike NTFS, or Apple's proprietary AFS, HFS, HFS+. I just wish that both M$ and Apple could get along better.

The number after it is the number of bits that each cluster of data can contain. FAT12, 12 bits -FAT16, 16 bits etc... The limitations basically are in the size of the name for the file, and the size of any one particular file, and the total accessible drive size. It's not efficient for processing, but it is compact and space efficient, so a small sized medium (like old floppies or small flash cards) benefits from this compactness. The down side is that clusters tend to spread across the medium- this slows the access time, which can be improved by decrementing.

NTFS (New Technology File Structure) and HFS (Hierarchical File System) allow a lot more versatility, but the down side is that they are very verbose. So the up side is that the cluster size can be variable, file names long and nested, and medium size large, there is a down side, that is the amount of information needed to store a file is large, and could potently exceed the size of very small storage media.
 
The problem is that the official size limit of a standard FAT16 file system is 2GB. 64K*32K=2048M=2GB.

In order to get a 4GB FAT16 file system you need to use 64K clusters, which are beyond the FAT16 standard.

http://www.microsoft.com/resources/.../en-us/dm_format_dynamic_volume.mspx?mfr=true

For Windows NT 4.0, Windows 2000, Windows XP, and , the cluster size of FAT16 volumes from 2 GB through 4 GB is 64 KB, which can create compatibility issues with some applications. For example, setup programs do not compute free space properly on a volume with 64 KB clusters and cannot run because of a perceived lack of free space. For this reason, either FAT32 or NTFS must be used on volumes larger than 2 GB. Format displays a warning and asks for a confirmation before formatting a volume that has 64 KB clusters using FAT16.

Is there any real reason you need to keep it FAT16 and not FAT32?

B
 
Solved now, thanks for all the help!!

I bought a Belkin (normally Mac friendly products) 15in1 reader and it works just great.

..the card has to be FAT16 formatted as the device reading it (Becker car stereo) cannot read FAT32 :(

As a slightly related topic does anyone know why when I drag over folders of mp3s from my iTunes folder I get a load of junk files named:

._01xxxxxx.mp3

..as well as the actual mp3 files? Some folders do it, some dont. Of course these dont show in finder, only when I connect the drive to a Windows PC.

Cheers!
Adam
 
Those ._files are all the resource information from Mac OS X (icon, placement in Finder, etc). You need to (at least temporarily) turn off the "Show hidden files" in Windows to get rid of them (well, you won't really get rid of them, but you won't see them either... ;)).

Edit: You can also try FinderCleaner to "wash" the drive before disconnecting from the Mac... (Remember to test with caution, i.e. backup first... ;))
 
Mitthrawnuruodo said:
Those ._files are all the resource information from Mac OS X (icon, placement in Finder, etc). You need to (at least temporarily) turn off the "Show hidden files" in Windows to get rid of them (well, you won't really get rid of them, but you won't see them either... ;)).

Edit: You can also try FinderCleaner to "wash" the drive before disconnecting from the Mac... (Remember to test with caution, i.e. backup first... ;))

I can't tell my car stereo to ignore them so I'll give the finder cleaner a shot .. thanks!!!

Adam
 
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