From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <975d409a6767038bfd7ab37948d58dea@coraid.com> From: erik quanstrom Date: Wed, 4 Apr 2007 08:42:04 -0400 To: 9fans@cse.psu.edu Subject: Re: [9fans] 2 newbe questions of a general nature In-Reply-To: <1175569922.581801.306120@o5g2000hsb.googlegroups.com> MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Topicbox-Message-UUID: 3d9e3154-ead2-11e9-9d60-3106f5b1d025 On Wed Apr 4 05:14:54 EDT 2007, vlholmesjr@netzero.net wrote: > i was reading about jukeboxs & worm drives on the plan9 site. CD-R ~= > WORM... > so does the venti system allow you to use a recordable cd in a multi- > session mode as a backup repository? the worm was originally used with the standalone fileserver kernel. magnetic disks were used as cache, the dump (archival snap in venti-speak) was written linearly onto the worm starting at block 3 of the first worm disk. a robot changer was used to swap disks. one could add the ability to write to cd/dvd to fs without too much trouble. the trouble is it takes a lot of dvds to backup a single drive and to make this really work, you'd need a robotic changer. venti has isect (index) and arenas (data). arenas are approxminately cd size, but there's no provision to deal with cds directly. copying filled arenas to cd would be pretty simple with cdfs. (dvds aren't supported. i don't know about muti-session cds.) the problem is making this automatic. > also, i am three hours into a fresh plan9 download, and firefox says i > have three hours to go. ( i;m in the boonies about 5 miles past the > nearest broadband, but i really want to try abaca badly. Maybe i can > recycle my w98 partition!) isn't there a way to keep a plan 9 arena > on the web so people who enjoy life on the bleeding edge could update > their source from the incremental backup and rebuild rather than > download a new iso to stay up to date? been there, done that! you can update with /usr/genda/bin/rc/pull. this will scan a log and update only the files changed. it was very speedy for me over a 56k modem. over the modem i never could get the full image to download before it was updated, thus forcing me to start over. - erik