Can't read specific Diskette

So you have an old Zip drive with a parallel port? You can't connect that using USB. Nor can you connect that to a computer running any version of Windows newer than XP.

Two options:
1) Buy a USB version of the Zip drive and use it to read your disks. Used, USB Zip drives seem to run around $35 or so.
2) Get a computer using an old version of Windows. If it doesn't have a parallel port, you should be able to buy a PCI card with a parallel port on it.

Once you're able to access the files, copy them onto a USB thumb drive. For $10, you can get a 32 GB USB drive, which should hold everything from at least 320 Zip disks.

remove unprotection from 100mb Iomega zip

IOMEGA make a USB ZIP drive that reads and writes 100 and 250 Mb disks. Don't know if this is available any more, you might be able to pick one up 2nd hand.
If you still have your old computer, try networking your old and new computer together so you can transfer data from the ZIP drive on your old computer to your new one.

The external power supply is a 5V/1.0A DC

Its probably a bad disk. The only way I have been able to fix these is to First launch disk utility THEN put the disk in. THEN run the utility. You have to do it in this order. The key thing here is utility has to be running first and then insert the disk "HOT"
Hope this helps!

If its a really old zip drive then its SCSI and not usb. It may even be parallel for a pc. To avoid having to deal with drivers or anything like that. You could probably find a cheap external USB zip drive. You dont need drivers for this, only for the older ones.
Also, you might go to an apple store and get some kid to burn a cd from it, if its just a one time thing.
Hope this helps!

These are pre-formatted and servoed at the factory.
Awhile back I was researching the 'Click of death" fault and found a guy in Belgium or Germany that coded a repair program for bad disks. Googlee for it

sometimes when it formats, it hoses the servo information (which the drive uses to keep track of things) and the disk becomes useless. This is why I stopped using ZIP disks and won't even buy a drive when I see them for 9.99 ;-)

i think it is damaged. because of the bad sectors . try to use third party recovery app

Hi,

Right click my computer and go to manage. Go to disk management. Does your drive show up there? If so, right click to assign it a letter.

what type of zip disk are you trying to read? if it is larger than 100MB, the drive will not be able to read it.

can you read other disks? can you see the drive in my computer?

what operating system are you using, and how does does this drive connect to the computer? USB? Firewire?