Re: [9fans] kenfs config? (was: OT: scsi sense error code hardware

[Axel Belinfante <Axel.Belinfante@cs.utwente.nl>]

> 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<dev1><dev2> config the <dev2> 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.