Re: [PATCH v2 4/5] Patch the CHRP boot script
Sorry for the direct question, but I assumed you would know the
answer. We are currently trying to replace yaboot with grub-ieee1275
in debian-installer, but are facing a very small issue, namely with OF
path handling. It appears that on Apple hardware only `ofpath` from
Yaboot returns the correct path. Are you using grub on any of your
Apple hardware ? Thanks much for comments.
See below for full context.
On Tue, Nov 21, 2017 at 7:51 AM, Frank Scheiner <email@example.com> wrote:
> Hi Rick,
> On 11/21/2017 02:48 AM, Rick Thomas wrote:
>> If you can tell me *exactly* what to do, and I don’t have to set up an
>> installation environment to do it, I’ll be happy to test ofpathname vs
>> ofpath vs devalias on my PowerPC test machine farm.
> Well, to be on the safe side, I think you need to use the latest versions of
> ofpath and ofpathname, hence running Debian Sid could be the easiest way to
> make sure this is the case.
> You need to have a disk installed, because ofpath and IIC also ofpathname do
> not or cannot translate non existing device aliases to OF paths.
> In general the commands I ran for the p5 520Q below should do. Assuming that
> the output of ofpathname will always be wrong for Power Macs, it should be
> sufficient to check only one partition.
> I think devalias does only save/return OF paths up to the disk level, but
> not up to the partition level. But the disk level should already be
> sufficient to detect differences to ofpath and/or ofpathname.
> You have to go to OF to run devalias, but with a glass console you won't be
> able to copy the output. There are ways to interact with the OF via telnet
> from another machine (see  and possibly ), but I haven't tried this
>> I have the following machines:
>> Power Mac G5 11,2,
>> Power Mac G5 7,2 (I think — it’s turned off right now)
>> Mac mini G4 10,1
> I have these types available, too, "except" for the 7,3 which currently
> won't start up correctly.
> Here's the output of ofpath and ofpathname for /dev/sda2 on the my Mac mini
> root@mac-mini:~# ofpath /dev/sda2
> root@mac-mini:~# ofpathname /dev/sda2
> /usr/sbin/ofpathname: line 812: warning: command substitution: ignored null
> byte in input
> Also interesting, it looks like ofpathname cannot even give a "correct"
> result for an IBM machine, at least not for my p5 520Q:
> root@p5-520q:~# lsblk
> NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
> sda 8:0 0 136.7G 0 disk
> ├─sda1 8:1 0 7M 0 part
> ├─sda2 8:2 0 131.1G 0 part
> ├─sda3 8:3 0 1K 0 part
> └─sda5 8:5 0 5.6G 0 part
> sr0 11:0 1 1024M 0 rom
> root@p5-520q:~# ofpath /dev/sda1
> root@p5-520q:~# ofpathname /dev/sda1
> root@p5-520q:~# ofpath /dev/sda2
> root@p5-520q:~# ofpathname /dev/sda2
> Please notice that ofpathname returns the same result for two different
> partitions. :-/
>> Mac G4 3,4
>> Mac G4 dual core 3,6
> Results for these machines would be helpful. It should work to
> install/upgrade to Debian Sid on one machine only and just move the disk to
> the other machine later on for testing.