One of our 68kMLA members here recently PM'd me about a problem he's been having trying to format 400k floppies for booting on his 128k Mac. He told me the following:

Format it as 400k by choosing 'one-sided' when clicking on Erase Disk under Special menu on System 6. I copied System 2.0 I got from this site http://www.earlymacintosh.org/disk_images.html but it still wont boot. i tried the disk on both the internal floppy drive and the external superdrive on my 128k Mac but i get a '0F0062' error.

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System 6.x allows formatting of 400k disks. I know because I've done it on my SE/30. So is there something inherent to the PowerBook 170 that would prevent a 400k disk formatted on that same PB170 from booting on a 128k Mac?

Thanks.

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Thanks JDW for posting it for me. I got it working. Since all of the disk images i downloaded don't seem to be recognized by Disk Copy 4.2, I tried mounting one disk image on mini Vmac and loaded it on Disk Copy 4.2 and saved it as a disk image. I used HFVExplorer to put the saved image in a diskette. Loaded the image using Disk Copy on my PB170 and successfully made a 400k disk. The disk booted fine on my Mac 128K.

I remember reading somewhere that you can format a 1.4mb diskette as a 400k by covering the small square hole at the bottom right corner. I taped it and formatted (one-sided) the disk on my PB170. Tried it on my Mac 128k, 'Initialize' and it worked. I even tried copying the system files and it booted also. I tried this on two new 1.44mb HD diskette i bought the other day and they all worked.