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A FAT32 drive can be reformatted to NTFS, EXT3/4, XFS, or whatever hell else you want. A pre-formatted Seagate with NTFS isn't anymore expensive than a Seagate pre-formatted with FAT32. If you're talking about solid state stuff like USB thumb drives, you shouldn't be formatting them FAT32, you should be formatting them EXFAT, if you're using them with Windows, because it's far more efficient at keeping the drive alive. Finally, FAT32 cannot store files larger than 4GiB. It is mathematically impossible. The maximum possible size for a file on a FAT32 volume is 4 GiB minus 1 byte or 4,294,967,295 (232 − 1) bytes. This limit is a consequence of the file length entry in the directory table and would also affect huge FAT16 partitions with a sufficient sector size.[1] Video applications, DVD images, large databases, and some other software easily exceed this limit. http://en.wikipedia.org/wiki/File_Al...on_Table#FAT32 |
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That table is an index that exists in the filesystem itself, regardless of whether you mount it in Windows, Unix, OS X, or anywhere else. All operating systems use FAT32 in exactly the same way. Pointers to files and folders are stored in clusters and those clusters are indexed in the file allocation table. The file and directory length entries in the index have a limited size and therefore the index cannot accommodate files larger than 4GiB. You cannot write files larger than 4GiB to a FAT32 filesystem on Windows, OSX, Linux, or any other operating system. It's a limitation of the filesystem itself. |
Here's a thread from a person who swore their Lacie external HDD, formatted FAT32, could store a 30GB virtual machine image.
The problem is that a VM image is not a "file", it's actually a folder or bundle. http://forums.macrumors.com/showthread.php?t=477728 |
hmm, well, I recall figuring a way through terminal to get larger files copied to drive without reformatting. I have somebody else doing this now, but I'll look for my notes on it.
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It's entirely possible that your archive looks like a file but is actually a bundle of files in a wrapper. I'm guessing that's the case. Similar to the guy on that Mac rumors post. At any rate, it doesn't really matter. I'm not trying to bust your chops or anything. Just making sure the information is out there. You shouldn't be using FAT32, it's gross. :D |
Can't you use a time machine backup and restore?
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There's a ton of tweaks you can do but in the end I opted for a FireWire 800 enclosure and a 200GB drive. Trying to backup directly to NAS and limit the size of the sparsebundle was just too problematic. It got over 400GB at one point. Now I run Time Machine on the local FireWire drive and then make an image of the entire disk once a month and copy it to NAS. |
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