Sent: Monday, April 22, 2002 10:35
PM
Subject: Re: [hfs-user] HFS Maximum Image
Size
The maximum file size on HFS volumes is 2GB-1 (the maximum
value in a signed 32-bit integer). See struct HFSCatalogFile.
The
maximum volume size is theoretically just under 256TB (actually, 65535
allocation blocks * (4G-512) bytes per allocation block). The allocation block
size is an unsigned 32-bit integer, but must be a multiple of 512. I don't
know of any implementation that supports HFS volumes 2TB or larger; some
versions have much smaller limits (eg., 2GB or 4GB). Many implementations use
32-bit integers (signed or unsigned) for offsets into the volume, or as block
numbers (assuming 512 bytes per block).
-Mark
On Sunday, April
21, 2002, at 07:44 AM, Entwicklung wrote:
The maximum size of an HFS-volume seems to be 65535*65535 = 3.99 GB. (since
the respective fields in the MDB are UInt16's). Does this mean that to store
a file of size 4.7GB I would have to necessarily go in for HFS+ or
is this possible with HFS somehow
?