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| Author | 7.6 installer reports start volume being protected (Read 30087 times) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Bolkonskij
Administrator 1024 MB  Posts: 2023 
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on: March 12, 2024, 11:29
Ran into an interesting issue when trying to install 7.6 on my new Power Mac 7500. It had 8.0 pre-installed. I booted from a burnt 7.6 CD into the installer by holding down the C button on startup. Upon finishing, it reports an error saying that it couldn't create a desktop folder on the start volume and that I should get rid of the write protection. Hmm... odd, right? Well, let's boot from System 7 Today's Disk Tools floppy to initialize that hard disk - which is, btw, the original 750 MB Quantum Apple HDD that came with the model. Initialization worked fine, so I went and I also updated the drivers for what it is worth. Successful. Back to booting System 7.6 from CD for installation. It starts up and spits out the same error about write protection. What's going on here? Definitely no software write protection in place since the drive has been wiped. Could it be that 8.0 altered the HDD drivers in a way that will prevent me from going back? Somebody ever seen that error before? |
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68040
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512 MB  Posts: 950 68k - thy kingdom come, thy will be done !
Reply #1 on: March 12, 2024, 11:32
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Could it be that your boot drive got "touched" by HFS+? I know that system 7 looks at an HFS+ partition and then just turns around in disgust.
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Bolkonskij
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Administrator 1024 MB Posts: 2023
Reply #2 on: March 12, 2024, 11:39
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Drive Setup Lite reported it to be a HFS volume and initialized it fine. I think HFS+ only came with 8.1 but not 8.0 if my memory serves me right.
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Bolkonskij
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Administrator 1024 MB Posts: 2023
Reply #3 on: March 12, 2024, 11:46
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In case somebody runs into the same issue - I've now booted from the Disk Tools 2 floppy and then executed the 7.6 installer from the CD. It does install now - no longer complaining about the write protection. Take away - always keep your floppy drives on your System 7 Macs in good shape ;-) Anyway, I'd still be interested if anybody knows the cause. I wonder if this is actually some kind of bug.
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wove
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1024 MB Posts: 1363
Reply #4 on: March 12, 2024, 12:44
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Although this article does not mention anything specific to locked disks, it does go into a lot of detail on assorted problems with System 7.6. It covers software and hardware problems. This information comes from and educational site. If nothing else it really points to how Apple was really tied in with education, especially here in the US. The local college here in my town was for years and all Apple school. If you went to Gustavus Adolphus College in the 90s-00s you would need to come with a Mac. And for years following it was an excellent source of older Mac hardware. (This area was settled by Swedish Lutherns in the 1870s-1880s.) <https://web.mit.edu/macdev/Development/Documentation/www/macos-info/macos_7.6_trouble.html>
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ovalking
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128 MB Posts: 199
Reply #5 on: March 12, 2024, 14:17
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>Upon finishing, it reports an error saying that it couldn't create a desktop folder >on the start volume and that I should get rid of the write protection. The message is logical - it can't write to your start volume as it is a CD-ROM. It could be a bug specific to your particular installer. I wonder if you get the same error when using the proper Apple install CD?
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ShinobiKenobi
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256 MB Posts: 362 System 7 fan
Reply #6 on: March 12, 2024, 23:37
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I'm glad you got it working. When I set up the ATA hd I'm using now with my Sonnet Tempo Trio, I created the large partition where I save my files as Mac OS Extended cuz I thought I remembered reading somewhere that it had to be HFS+ for drives larger than 2 GB. And then when I tried to save to it on Sys7, I got a similar error message. No biggie, I just switched to my Mac OS 8 disk and erased it to Mac OS Standard. But yeah, that's weird. Edit: I'd never used Mac OS 8 before, and so since I can use decent size HDs now that I got the Tempo Trio installed in my Power Macintosh 7200, I installed it on a partition. I really like it, especially the "About this computer" window, with the picture from space. Eventually I hope to get a 7500. Have fun with your new family member! 
Last Edit: March 12, 2024, 23:47 by ShinobiKenobi
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MTT
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256 MB Posts: 394 SSW7 Oldtimer
Reply #7 on: March 13, 2024, 01:31
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@Bolkonskij: Did you use one of the 7.6 disk images from the MG, made from before Mr.Fahrenheit made some additions to the page? Quote from: Mr.Fahrenheit, he left this note in the 7.6 Revisions: "Fixed 7.6 and 7.6.1 images. Left originals intact, even though they do not appear to be genuine extracts. You be the judge..."Sounds rather ominous (and that the page probably needs a cleanup).
Last Edit: March 13, 2024, 01:33 by MTT
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Bolkonskij
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Administrator 1024 MB Posts: 2023
Reply #8 on: March 13, 2024, 09:09
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@ovalking - yep, but then it's a bug, isn't it? If you boot from CD, it shouldn't try to create a Desktop Folder on the CD you're supposed to use for installing the OS ? Booting from another device (the floppy disk in my case) did the trick though and it would let me install. @MTT - Yes! I actually went with DL #3, the German 7.6 installer, to dabble with a localized Mac OS install. (I've only ever used English ones before) EDIT: First post from the 7500/100 and iCab 2.9.9 here in the forum. With many to follow, hopefully ;-)
Last Edit: March 13, 2024, 09:11 by Bolkonskij
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MTT
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256 MB Posts: 394 SSW7 Oldtimer
Reply #9 on: March 14, 2024, 05:18
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@Bolkonskij: DL#5 on that page I think you meant (for the German 7.6 CD). Anyway compelled to finding out why -mainly because I have a mission to remove cruddy images from the MG (or at least attempt to fix them). The toast image in that zip download is fine, I think something may have gone wrong with your burn to CD blank. I was able to use the burned to CD disc, to boot, install and run it on my Centris Mac. I wish that I had a PPC Mac capable of running OS 7, but installing 7.6 DE onto the Centris I think is a pretty good indication that it's OK. So now I have a dual booting Centris... Time to learn a new language ? ;-)
Last Edit: March 14, 2024, 06:49 by MTT
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Bolkonskij
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Administrator 1024 MB Posts: 2023
Reply #10 on: March 14, 2024, 07:49
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Oops, yeah...DL5 not 3 on the page, indeed. Sorry! The issue occured when booting from CD (holding down "C") on startup. It'd boot up right into the installer, report the error - and restart without leaving me any other option. Only as I used a floppy to boot into 7.5 first, and *then* executing the installer from the booted OS, it would install just fine onto the hard disk. The disc / image itself is OK. Did you install the 7.6 from whatever OS you were running on the Centris before or did you boot from CD into the installer ? That seems to make the difference. About learning a new language - it's never too late ;-)
Last Edit: March 14, 2024, 07:50 by Bolkonskij
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MTT
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256 MB Posts: 394 SSW7 Oldtimer
Reply #11 on: March 14, 2024, 13:27
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No, didn't hit that error here. Booted from the CD (holding down "C") and completed the install from the CD without any further adieu. But as you were able to use a floppy to come to your aid - it goes to show that there is more than one way to get something done  I still wish I could have tested it on a PPC Mac, although that .toast file burned to a CD blank seems to be fine, as far as I can tell.
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Bolkonskij
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Administrator 1024 MB Posts: 2023
Reply #12 on: March 14, 2024, 14:26
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Not sure if 68k or PPC would behave differently. My hunch is that it's got something to do with the OS 8 that was installed there. I know, I wiped it clean but my assumption is that some kind of flag remained that led to the problem. And we all know, Mac OS 8 is evil ;-)
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MTT
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256 MB Posts: 394 SSW7 Oldtimer
Reply #13 on: March 15, 2024, 01:38
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Although I don't currently have a System 7 capable PPC Mac, I was able to install 7.6 DE on SheepShaver, using the CD I had earlier installed to the Centris with. No problems there, either. - I deliberately used a drive file that previously had 8.1 on it, too. While still wishing I had actual PPC hardware, it does seem to me that it may have been an issue with the CD you used. Ovalking is correct with his observation "The message is logical - it can't write to your start volume as it is a CD-ROM." The installer couldn't locate Finder entries that it expected to find on that startup volume (the CD you booted from), so it needed to update the volume's desktop database before it can continue, but of course, it cannot write to a locked volume. And... if you had used Toast (version?) to burn the CD, I'm fairly confident I know the reason why it occurred with your install (it's not a bug, it's a rotten Toast feature).
Last Edit: March 15, 2024, 06:14 by MTT
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Bolkonskij
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Administrator 1024 MB Posts: 2023
Reply #14 on: March 16, 2024, 07:29
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The fact that a supposedly self-booting CD relies on creation / altering of a desktop folder on the volume is the odd thing here. I found your remark regarding Toast interesting. I did indeed use Toast to burn the CD. Could you further elaborate what kind of error it is and what you know about it? I've been burning all my Mac OS install discs with Toast for decades, but I've never run into an error like this one before.
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