<Most soft-sectored controllers (the LSI ones used in most other micros) <didn't use the index hole for very much, except during formatting. A <suprising number of machines will work quite happily with the index Try it you will find many cases where that is not totally true. <Hard sectored controllers (like the one in my Z-90) do need the sector <holes to find the start of a sector. Reason for that is by counting holes you don't have to look for marks on the disk. Allison