01-25-2007
The maximum file size of a FAT file system is 4GB, and if someone uses a signed type, it halves again to 2GB. I'm not surprised you're hitting limits.
That, and FAT filesystems aren't a good match to UNIX file access in the first place; wonky access permissions, multiple kinds of file names and wonky restrictions on file names, the division between "name" and "extension", these strange "hidden" flags, and so forth. You usually can't execute files from a FAT filesystem under UNIX, since FAT has no executable bit. It just disallows it, even when the permissions look like rwx.
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LEARN ABOUT OSX
newfs_exfat
NEWFS_EXFAT(8) BSD System Manager's Manual NEWFS_EXFAT(8)
NAME
newfs_exfat -- construct a new ExFAT file system
SYNOPSIS
newfs_exfat [-N] [-R] [-I volume-serial-number] [-S bytes-per-sector] [-a sectors-per-FAT] [-b bytes-per-cluster] [-c sectors-per-cluster]
[-n number-of-FATs] [-s total-sectors] [-v volume-name] special
DESCRIPTION
The newfs_exfat utility creates an ExFAT file system on device special. If the -R option is not given, and the device is already formatted
as ExFAT, it will preserve the partition offset, bytes per cluster, FAT offset and size, number of FATs, offset to start of clusters, number
of clusters, volume serial number, and volume name (label). If a volume name was specified via the -v option, that name is used instead of
the volume's previous name.
The options are as follow:
-N Don't create a file system: just print out parameters.
-R Do not check whether the device is currently formatted as ExFAT. Always derive the partition offset, bytes per cluster, FAT offset
and size, and offset to start of clusters based on the device type and size.
-I volume-serial-number
Volume ID, a 32-bit integer.
-S bytes-per-sector
Number of bytes per sector. Acceptable values are powers of 2 in the range 512 through 4096.
-a sectors-per-FAT
Number of sectors per FAT.
-b bytes-per-cluster
File system block size (bytes per cluster). Acceptable values are powers of 2 in the range 512 through 33554432.
-c sectors-per-cluster
Sectors per cluster. Acceptable values are powers of 2 in the range 1 through 65536.
-n number-of-FATs
Number of FATs. Acceptable values are 1 or 2. The default is 1. Using any value other than 1 is discouraged, and may be incompati-
ble with other devices.
-s total-sectors
The total number of sectors in the device.
-v volume-name
Volume name (label). The name will be converted to UTF-16, and must be no longer than 11 UTF-16 characters. ASCII control charac-
ters and some punctuation characters are not allowed (similar to DOS 8.3-style names). NOTE: The volume name may be an empty (zero-
length) string.
EXAMPLES
newfs_exfat /dev/disk0s1
Create a file system, using default parameters (or existing ExFAT layout), on /dev/rdisk0s1.
newfs_exfat -v Hello disk2s1
Create a file system with the name "Hello" on /dev/rdisk2s1.
SEE ALSO
mount_exfat(8), fsck_exfat(8)
DIAGNOSTICS
Exit status is 0 on success and 1 on error.
HISTORY
The newfs_exfat command appeared in Mac OS X 10.6.3.
Darwin January 19, 2010 Darwin