Commodore Service and Restorer - 5 1/4" disks for Commodore computers
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5 1/4" DS-DD Commodore disks


Many people wonder where to get disks for their Commodore 64, XS-64, VIC-20, 16, 116 and Plus 4 computers and what condition they'll be in.

You can get - in many cases, without antecedent - used DD disks with Commodore games and programs on them, on various forums. But the question is, where were they stored? Maybe in damp, musty basements... in dusty, warm attics... but luckily you still can get many disks, which were found e. g. in closets.

It is worth taking a look at the disks you have bought or found, one by one. By this we mean inspection.

We can immediately sort out the disk if we take it out from the case and we hear a "scratching" noise. It may happen if it was stored in a dusty place. The dust must have accumulated on the disk (at least on the felt inside for sure) and if we use such disk it can scratch both the disk and the floppy head. And that's not very healthy. The accumulated dust appears on the surface of the disk too.
By inserting such a dusty disk into the driver, the disk will still work, but it will certainly damage both the head and the disk itself too.

If you expose the blank part of the disk to light and you see centric circles or "spots/stains", DO NOT try to use these disks.
If there are concentric scratches on it, the data stored on the disk is most likely damaged and for instance, it can go wrong while formating. Concentrically scratched disks can still be used, however, the date at the scratch location is probably erroneous. These disks can still be formatted, but the data written at that place will be damaged. The disadvantage of the CBM system is that it does not indicate the BAD sectors while formatting and does not exclude them from disk capacity, contrary to DOS systems on PC.
If the disk is stained we might take "dirt" on the head during use. The dirt itself doesn't do harm, but we have to take off the casing of the floppy drive and we constantly need to clean the floppy head. On the other hand, everyone forgets a little thing here: the 1540, 1541, 1541C, 1541/II, 1551, and the 1570 drives are single-headed and the disk is pinned on the other side (in this case from above) by a felt with a spring. So if the stain is on the same side as the felt, we smear the dirt on the felt as well. In this case, by inserting another disk in, we smudge the dirt on the clean disk too.

We recommend sorting out these disks - without any emotion. Even if from a package of 100 only 10 disks remain usable. Keep in mind that we are creating more problems with these disks.
If there is a scratch, our game will be faulty, or we will just write the programs incorrectly.
If there's a stain, the reading will go wrong. In the worst case, it will read every disk wrong, or it won't even be able to read them. Of course, the latter can be solved with cleaning the head, however, if we put the same disks back again, the mistakes will start over and over again...

Although there is a case when you have to insert back these disks into the drive. Such a case is when there are programs on the disk, written by us and we want to transfer them to another disk.
In this case, a scratch is not really a problem. In case of a stain, save it first on a tape recorder, then after scrubbing the head, transfer from the tape recorder to a disk again.
There is no such problem with games because they can be downloaded from the Internet, then be transferred onto the disk with the XUM 1541.

You can read the Facebook post about the Commodore 5 1/4" DS-DD disks here: CommodoreSzerviz



Commodore Service and Restorer Hungary | Commodore 5 1/4 DS-DD lemezek
centrically scratched disk, dust is also visible at the top part

Commodore Service and Restorer Hungary | Commodore 5 1/4 DS-DD lemezek
stained disk

Commodore Service and Restorer Hungary | Commodore 5 1/4 DS-DD lemezek
strongly contaminated disk

Commodore Service and Restorer Hungary | Commodore 5 1/4 DS-DD lemezek
strongly contaminated disk

Commodore Service and Restorer Hungary | Commodore 5 1/4 DS-DD lemezek
single-head drive (the head is always at the bottom): 1541 (built in SX-64), 1541C, 1541/II, 1551, 1570

Commodore Service and Restorer Hungary | Commodore 5 1/4 DS-DD lemezek

Commodore Service and Restorer Hungary | Commodore 5 1/4 DS-DD lemezek
clamping felt part of a single-head drive

Commodore Service and Restorer Hungary | Commodore 5 1/4 DS-DD lemezek
dual-head drive: 1571 (built in 128D, 128DCR), 1581

Commodore Service and Restorer Hungary | Commodore 5 1/4 DS-DD lemezek


Commodore Service and Restorer Hungary | Commodore 5 1/4


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