site_archiver@lists.apple.com Delivered-To: darwin-dev@lists.apple.com On Jun 10, 2006, at 12:02 PM, darwin-dev-request@lists.apple.com wrote: I need to create a big file (20GB), the contents is not important, will fill that in later, just the file size... When I try to do this with lseek and then write one byte. as soon I close the file, it takes a few minutes because it looks like the OS is filling up the rest with 0x00 bytes during close or flush. File system is HFS+ = Mike _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.appl... Any trick on how to prevent this from happening? HFS+ does not support sparse files; what you are seeing is the expected and correct behaviour. If you don't need the file when you are closing it, first truncate it to zero size, then close and delete. This email sent to site_archiver@lists.apple.com