DEC 8 Inch Formats
Digital Equipment Corporation used the following formats on 8-inch disks:
| Category | Drive designation | DEC RX01 | DEC RX02 | ||
|---|---|---|---|---|---|
| App. size | 250 KB | 500 KB | |||
| Drive | Heads (data surfaces) | 1 | 1 | ||
| Spindle motor speed (RPM) | 360 | 360 | |||
| Controller | Transfer rate (kbit/s) | 250 | 500 | ||
| Encoding | FM | FM/MFM | |||
| Media | Track density (TPI) | 48 | 48 | ||
| Bit density (BPI) | 3,200 | 6,400 | |||
| Density designation | SS SD | SS DD | |||
| Geometry | Cylinders | 77 | 77 | ||
| Sectors per track | 26 | 26 | |||
| Total sectors per disk | 2,002 | 2,002 | |||
| Sector size (bytes) | 128 | 256 | |||
| Capacity | Formatted (bytes) | 256,256 | 512,512 | ||
| Formatted (KB) | 250.25 | 500.5 | |||
| SS = Single Sided; SD = Single Density; DD = Double Density; TPI = Tracks per Inch; BPI = Bits per Inch | |||||
Read more about this topic: List Of Floppy Disk Formats