Date: Tue, 20 Oct 1998 04:43:02 -0700 (PDT) From: asami@cs.berkeley.edu (Satoshi Asami) To: scsi@FreeBSD.ORG Subject: for i in disks Message-ID: <199810201143.EAA17327@silvia.hip.berkeley.edu>
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Hi folks,
I'm thinking about implementing an "autorun"-like mechanism for disks.
The idea is to have a script with a known name on a known position
(say, partition `a' on the first BSD slice) which is called during
boot. The script does something to set up the disk (mount some other
partition, or set up a ccd, or something like that).
However, to do this, I need to be able to write a loop in /etc/rc* to
iterate through all available disks. I guess devfs when fully
implemented will make this easy ("/devfs/da[0-9]*s?a"?) but my
understanding is that it is not ready yet. I could try mounting all
the nodes in /dev (the ones that are not available will presumably
just fail) but with up to 96 disks per system, that could be a lot of
failures.
I could do something like
grep 'da[^ ]* at ahc' /var/run/dmesg.boot
but it sometimes overlaps other messages and it also appears to be
very incomplete on some machines.
===
>> grep 'da[^ ]* at ahc' /var/run/dmesg.boot | sort
WARNING: / was not properly dida12 at ahc0 bus 0 target 12 lun 0
da0 at ahc0 bus 0 target 0 lun 0
da1 at ahc0 bus 0 target 1 lun 0
da10 at ahc0 bus 0 target 10 lun 0
da11 at ahc0 bus 0 target 11 lun 0
da13 at ahc0 bus 0 target 13 lun 0
da14 at ahc0 bus 0 target 14 lun 0
da15 at ahc0 bus 0 target 15 lun 0
da2 at ahc0 bus 0 target 2 lun 0
da3 at ahc0 bus 0 target 3 lun 0
da4 at ahc0 bus 0 target 4 lun 0
da5 at ahc0 bus 0 target 5 lun 0
da64 at ahc4 bus 0 target 0 lun 0
da75 at ahc4 bus 0 target 11 lun 0
da8 at ahc0 bus 0 target 8 lun 0
da9 at ahc0 bus 0 target 9 lun 0
===
(There are 42 disks on this machine.)
Any ideas?
Satoshi (I know I know, one of these days I'll actually implement something)
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