Date: Sun, 5 Nov 1995 22:45:34 +0100 (MET) From: Thomas Graichen <graichen@sirius.physik.fu-berlin.de> To: hackers@freebsd.org Subject: ideas from netbsd Message-ID: <9511052145.AA24092@sirius.physik.fu-berlin.de>
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hello
(part 2)
i looked a bit into NetBSD and it's sources and got the following
ideas:
* one thing that looks very intersting is the ccd-driver (concatenated
disk driver) - using this driver it is possible to realize
disk-striping over multiple disks - serial (one after the other) or
interleaved - it is configured into the kernel as a pseudo-device and
then you may put together your striped disk(s) using the command
ccdcontrol together with an optional /etc/ccd.conf - i think
disk-striping is something wich is currently missing in FreeBSD - i
looked a bit more into it and tried to adapt it to FreeBSD but it's my
first try to do something deep in the kernel and thus i need someone
who helps me - is there anybody interested ? - i've a test-machie here
(2 identical 85 mbyte ide disks ready to be concatenated) - and i'm
willing to help as much as i can (and to learn something more this
way)
* another thing is the COMPAT_FREEBSD option (... and code) - i think
it would be a good idea to have something similar for NetBSD
(COMPAT_NETBSD) in FreeBSD - i think it should be relatively easy to
add (maybe i'm wrong) - if NetBSD 1.1 comes out (it's announced for
november the 17th) i'll try how good it is and tell you more about it
(the same for the ccd-driver)
* i don't know how far the linux-emu currently is (i'll start CTM'ing
-current in the next days) but i think it only works with linux-aout -
but linux now is moving to linux-elf - and if i remember right - the
NetBSD version of the linux-compat stuff also supports elf - maybe
worth looking (but i think the one(s) who is (are) working on the
linux-emu has done it ...)
that's all for now - just some ideas - please let me know what you
think about them
t
_______________________________________________________||_____________________
__||
Perfection is reached, not when there is no __|| thomas graichen
longer anything to add, but when there __|| freie universitaet berlin
is no longer anything to take away __|| fachbereich physik
__||
- Antoine de Saint-Exupery - __||
___________________________||____email: graichen@omega.physik.fu-berlin.de____
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