Date: Fri, 28 Nov 1997 10:54:18 -1000 (HST) From: "David Langford" <langfod@dihelix.com> To: asami@cs.berkeley.edu (Satoshi Asami) Cc: jamil@trojanhorse.ml.org, hackers@FreeBSD.ORG Subject: Re: Drive Mirroring Message-ID: <199711282054.KAA25809@dihelix.com> In-Reply-To: <199711282014.MAA21785@silvia.HIP.Berkeley.EDU> from Satoshi Asami at "Nov 28, 97 12:14:14 pm"
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> * and dump | restore to it. Can anyone think of a way I could maintain an > * entire mirrored system without ccd, perhaps some software that nightly > * looks at the changes on one drive and puts them over to the second without > * basically rewriting the whole thing. > >Partition the drives as root / the rest, ccd the two "rest" partitions >and partition them as you wish (/var, /usr, /usr/local, etc.). Write >a script that does the following every night: > >newfs /dev/rsd1a >mount -o async /dev/sd1a /mnt >cd / >find -dx . | cpio -dump /mnt >umount /mnt > >Granted, this will leave a small window of vulnerability during the >script is running, but if the root partition is small enough, it >should be real quick. > >Satoshi Any thought on what is required to make a "snapshot" feature in FreeBSD? -David Langford langfod@dihelix.com
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