Date: Tue, 16 Nov 1999 11:01:11 +0100 From: Jan Pechanec <pechy@hp735.cvut.cz> To: FreeBSD FS Mailing List <freebsd-fs@FreeBSD.ORG> Subject: Copying file with not allocated blocks on disk Message-ID: <Pine.SGI.4.05.9911161009250.2853-100000@akat.civ.cvut.cz>
next in thread | raw e-mail | index | archive | help
Hello, please, don't you know the reason why when copying file with some blocks still not allocated on the disk (the blocks that will be returned full of zeroes when accessed), the ,,zero'' blocks are actually written? Why there is no check whether writing zero block and do not write them? I understand that this would have to be inside the implementation of particular filesystem. Ie., in general, why not have assertion: if the disk block should contain all zeroes, we needn't to alocate physical space Thank you, Jan. -- Jan PECHANEC (mailto:pechy@hp735.cvut.cz) Computing Center CTU (Zikova 4, Praha 6, 166 35, Czech Republic) www.civ.cvut.cz, pechy.civ.cvut.cz, tel: +420 2 24352969 (fax: 24310271) To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-fs" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?Pine.SGI.4.05.9911161009250.2853-100000>