From mboxrd@z Thu Jan 1 00:00:00 1970 Message-Id: <200610172105.k9HL5x002179@zamenhof.cs.utwente.nl> To: Fans of the OS Plan 9 from Bell Labs <9fans@cse.psu.edu> Subject: Re: [9fans] kenfs config? (was: OT: scsi sense error code hardware In-reply-to: Your message of "Tue, 17 Oct 2006 16:18:18 -0400." References: From: Axel Belinfante MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-ID: <2173.1161119158.1@zamenhof.cs.utwente.nl.cs.utwente.nl> Date: Tue, 17 Oct 2006 23:05:58 +0200 Topicbox-Message-UUID: cb569cf8-ead1-11e9-9d60-3106f5b1d025 > The disks in a mirror need to start out with identical > contents. If (w5w1) is exactly the same size as w2, > I think you'll be okay. If they aren't exactly the > same size, the fake-worm blocks-written bitmaps should > be in different places, thus it won't work right. They are not the same size. Just checking (and increasing, with your help :-) my understanding: It isn't the case that in a config of cw0{f(w5w1)f(w2)} there are two fake-worm pseudo devices that each take care of their own bitmaps, which thus need not be at the same place? Or is that a rather weird config, and should in a c config the always directly be a worm or fake-worm device? Whereas in a config of cw0f{(w5w1)w2} there is a single fake-worm pseudo device and thus single bitmap, stored (I guess) at the same place on resp. (w5w1) and w2? (position will depend on computed size of {(w5w1)w2} I guess, which would be the minimum of sizes of (w5w1) and w2) > If you can boot your file server as a CPU server, > you can use dd to copy disks. I did not yet explore that option - have to fiddle a bit to take root filesystem from somewhere (my 'selfcontained' cpu/auth server, or laptop, or maybe sources). Will work out ok. I've also considered booting a live cd as a 'rescue disk' - but then I'd have to connect a cd drive first... :-) Thanks (a lot!) for your help so far - it's much appreciated! Axel.