Tuesday 6 March 2012

FORMATTING FLASH DISKS USING NTFS OR FAT32 (MS DOS)


FORMATTING FLASH DISKS USING NTFS OR FAT32 (MS DOS FAT)
NTFS offers the following to a Flash drive:
  • Portability: the drive will be unreadable by computers running Windows 95, 98 or Me, (some)Linux, or any other non-Windows device.
  • Longevity: NTFS will shorten the life of the drive. It is a journalling file system, which means that it logs changes, not just the end result, causing more writes to the drive. It also logs last access times for files, so even a read causes a write access. Flash memory has a lifespan of only about 100,000 writes.
  • Ease of access: NTFS records the owner of a file, so you are likely to see “Access denied” messages if you try to access the file on another computer. This could be regarded as a benefit, but it's actually just an inconvenience, as the data is not encrypted. If you want to secure the data on your USB memory sticks from prying eyes you should use encryption.
FAT32 is much more widely supported than NTFS. So I'd say:
  • if you have a very large flash drive, or often forget the safe removal, use NTFS
  • if you might ever have to use the drive on someon else's computer, use FAT32
ADVANTAGES of formatting Flash drive as NTFS
  • better for very large partitions (bigger clusters, files >2GB possible). Files larger than 4Gb can be stored
  • NTFS is a journaling file system, so it should be more robust than FAT/FAT32
  • more efficient use of storage (less wasted slack space when storing lots of small files)
  • better performance in general
  • support for ACLs and filesystem permissions
  • built in compression if desired.
  • journaled, thus better crash recovery
DISADVANTAGES of formatting Flash drive as NTFS
  • extra write activity wears out the flash memory faster
  • must explicitly dismount drive before removing from system
  • can't optimize for quick removal
  • under some circumstances may be forced to shut down system to remove
  • may need extra drivers to access drive from non-windows platforms
  • not compatible with older versions of Windows

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