Subject: Re: Optimal block size for dd
To: Michael Blake <firstname.lastname@example.org>
From: Luke Mewburn <lukem@NetBSD.org>
Date: 08/31/2003 12:52:21
On Sat, Aug 30, 2003 at 06:42:53PM +0100, Michael Blake wrote:
| Hi All
| I'm trying to make an image of a NTFS partition, and wondered what
| the optimal block size is. I've tried 512B, but it seems really
I use bs=64k and that saturates the disk.
I actually use something like
dd if=/dev/rwd0h bs=64k | gzip -1 > diskimage.gz
to reduce the image size by ~ 40%.
I found gzip -9 and bzip2 -N don't save that much extra space
in these images, yet take significantly more time.