Well, I made some significant progress throughout the day.
I started working on my second 512K.
I started out by rigging a long thin Q-Tip contraption with a screwdriver handle to clean the read head without tearing apart the computer and the drive.
I made about six different boot disks. I had started with Sony brand 800K floppies, which were brand new made on my PPC 7200, none of them worked.
I then decided to try an image made on my SE/30, it worked. It was a different brand disk though, a no name.
I was able to boot all 4 disk images (3 different system 2.0 and 1 HD20 disk) on the second 512K after cleaning the head. It may have been the disks all along on that machine, so maybe the head didn't even need to be cleaned.
I then started back to the 1st 512K and none of the disks booted.
I noticed that the read head never seemed to move on the first 512K, so I decided to clean the head one last time. Still nothing, so in a last ditch effort I put the drive from the first machine into the second machine which was now booting.
Success, the drive worked fine in the second machine.
Obviously there is something wrong with the first 512K
What would cause the read head to fail to seek in the first machine? I am assuming it is a bad chip or connection, or could it be the power supply?
I started working on my second 512K.
I started out by rigging a long thin Q-Tip contraption with a screwdriver handle to clean the read head without tearing apart the computer and the drive.
I made about six different boot disks. I had started with Sony brand 800K floppies, which were brand new made on my PPC 7200, none of them worked.
I then decided to try an image made on my SE/30, it worked. It was a different brand disk though, a no name.
I was able to boot all 4 disk images (3 different system 2.0 and 1 HD20 disk) on the second 512K after cleaning the head. It may have been the disks all along on that machine, so maybe the head didn't even need to be cleaned.
I then started back to the 1st 512K and none of the disks booted.
I noticed that the read head never seemed to move on the first 512K, so I decided to clean the head one last time. Still nothing, so in a last ditch effort I put the drive from the first machine into the second machine which was now booting.
Success, the drive worked fine in the second machine.
Obviously there is something wrong with the first 512K
What would cause the read head to fail to seek in the first machine? I am assuming it is a bad chip or connection, or could it be the power supply?