User:Tonyr/Journal/Nov07

07Nov07

Net install with preseed
Vagrant reworked the ppc net boot/install directories. I added a preseed.cfg file to initrd.img, replaced the existing copy, and tried a net install with promising results. Some settings still asked for user response:

• oem login name
• password re-enter
• partition scheme Guided
• confirm disk to partition
• country with mirror
• mirror url

The hostname is assigned by the dhcp server. Comments in the example preseed file note that the dhcp assigned name will take precedence. If there is no way to change this behavior, the hostname can be changed from the System->Preferences menu after installation. This might be incorporated into a post-install script.

12Nov07

Net install with preseed
I modified preseed.cfg to take care of the login name, password re-enter, and the partitioning scheme. The other items that ask for user response are resisting solution. I found a related foruim post that has some suggestions that sound promising, but the target platforms were x86, so they might not work for powerpc: http://ubuntuforums.org/showthread.php?t=434405

There are some other example preseed.cfg files out there along with some other info, having varying degrees of applicability:

• http://blogs.cae.tntech.edu/mwr/2007/04/17/unattended-debian-installations-or-how-i-learned-to-stop-worrying-and-love-the-preseedcfg/
• http://d-i.alioth.debian.org/manual/example-preseed.txt
• http://dotfiles.org/~voyeg3r/preseed.cfg
• http://www.debuntu.org/how-to-unattended-ubuntu-network-install-preseed-p5
• http://wiki.debian.org/DebianInstaller/Preseed

eMac woes
eMacs have a history of having bad capacitors. There is plenty info about it out there in netland. Some of the main symptoms are freeze-ups and failure to start up at all. A lesser symptom is choppy video performance during playback of video files. Even if an eMac appears to work, the presence of failed capacitors will eventually lead to poor machine behavior, if not complete failure. There is nothing that can be done about this short of replacing the logic board or replacing the individual capacitors. Neither of those solutions is feasible here at FG. One post I read indicated that some of the capacitors involved may only be stressed during video playback. If I can find that reference again I'll add it in here.

I'm mentioning it here because there are several eMacs in storage or in process. The one that was being prepped last Saturday was exhibiting the choppy video playback symptom. Another on that arrived on Saturday seemed to work but showed caps with bulging tops. Both of these should be recycled after harvesting the drives and memory. In future, any eMacs with blown caps should be harvested and recycled. These affected machines should be used only internally at FG, if at all.

21Nov07

Re-Entry Time, Good-bye for now
I gotta go back to the real world. Got a job programming. There are, of course, hundreds of loose ends here. I'll mention those I can recall, and update as other things occur to me.

• Ubuntu support for PowerPC is all but non-existent. The Gutsy release has some major bugs that are apparently not being paid attention to by anyone with the wherewithal to implement fixes. Feisty works, but has no long term support. Edgy and Dapper were insufficient to cover all of the Mac models that FG has been rebuilding. If MacBuild survives, FG needs to seriously consider some other distribution for PowerPC platforms, Debian maybe.
• There are build procedure documents in svn in the deadtrees project. The two existing ones are something like iMacBuildProc and iMacSWProc. Sources are .odt. Printable is .pdf. OpenOffice will generate PostScript through the 'Print' function, but I didn't discover that unitl alater. I don't remember the exact names at the moment. I'll come back and correct the later (maybe). The first one is a physical build procedure for the 'colorful' iMacs, those spacey bubble things. The other one is the newtwork software install procedure. There isn't one for Towers; I haven't gotten around to creating it yet. The tower process differs only slightly: towers are a lot easier to open and work on, but get a lot dirtier on the inside. The Fan and the CD/ZIP cage have to be removed for proper cleaning.
• Procedures for the Cube, G4 iMac LCD (the 'Dome'), Mac mini (yeah, we actually got one of those one time) are undefined. Those models are hard to work on; memory and HDs are tested in place if at all possible.
• Procedures for laptops are completely undefined. If they work, great. If not, they go into cryogenic storage in the hope that expertise and cures will be available in the future. iBooks and PowerBooks have a variety of construction/take-apart configurations. Expansion memory and Airport cards are easily accessible, the rest is usually a PITA.'
• Some Macs come DVD-RW drives in the original configuration. Note that, in my experience, the '-' (minus or dash character) is key. These drives only work with DVD-RW media, NOT WITH DVD+RW MEDIA (emphasis mine). FG does not seem to have any DVD-RW media, so these drives DVD-RW functionality cannot be tested. Fortunately they also have CD READ and CD-RW capability, which can be and is tested.
• The iMac on the stand in the far corner of the MacBuild area has OSX installed. It has a DVD Writer and CD Writer attached. There is documentation on various Mac models there in folders on the desktop, including take-apart manuals for a lot of models. There are CD and DVD images in a folder there, too, PPC bootable installers and standalone Linux rescue CD images and whatnot.
• MacBuild sets the system clock explicitly before doing the install. I have been using a Finnix CD, which is a customized version of a Knoppix rescue CD. The Finnix CD image for burning is in a folder on the OSX Mac Desktop. There are several versions I think, and the author occasionally releases new versions.