Re: Does "Compress Drive to save disk space" help?
From: André Gulliksen (andre.gulliksen_at_start.no)
Date: 11/08/04
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Date: Mon, 8 Nov 2004 16:34:05 +0100
"hiryu" <purejunky@yahoo.com> skrev i melding
news:Xns959BD8F818917sorrynoemailcom@210.55.105.209...
> For the case of small file, there is minimum space the file occupied, no
> matter the how small the file size is, in an uncompressed drive.
> eg. in the drive that the cluster size is 32K, a file will take minimum
> of 32K bytes or multiple of 32K bytes, even if the actual file size is 1
> byte. In the compressed drive, this limitation is overcome. The space is
> fully used. That's why if you check the compression ratio of files with
> small file size, the ratio is very high.
> NB I never try the XP compression, but for stacker or doublespace, this
> is the case.
Stacker/Doublespace and NTFS compression are two completely different
beasts.
Stacker and Doublespace worked by creating a logical filesystem into one
single file, which is hosted by a FAT(32) partition. Thus the entire drive
would be stored as one single file, removing the slack used by files with
sizes that are not multiples of the cluster size.
Under NTFS the compression is done on a file-by-file basis. So an 8 kB file
compressed to 5 kB on a filesystem with 4 kB clusters will still occupy 8 kB
on the file system.
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