Editing Group coded recording (section)

=== {{anchor|Victor|Sirius}}Sirius/Victor ===
Similar, the 5.25-inch floppy drives of the [[Sirius Systems Technology#Victor 9000 / Sirius 1|Victor&nbsp;9000 aka Sirius&nbsp;1]], designed by [[Chuck Peddle]] in 1981/1982, used a combination of GCR and [[zone bit recording]] by gradually decreasing a drive's rotational speed for the outer tracks in nine zones while increasing the number of sectors per track<ref>{{cite web |title=victor9k |website=FluxEngine documentation |url=https://cowlark.com/fluxengine/doc/disk-victor9k.html |access-date=2024-07-19}}</ref> to achieve formatted capacities of {{val|606|u=KiB}} (single sided) / {{val|1188|u=KiB}} (double-sided) on [[96&nbsp;tpi]] media<!-- (physical geometry: 80&nbsp;tracks&nbsp;× 1/2&nbsp;heads&nbsp;× (11-19) variable sectors&nbsp;× 512&nbsp;bytes, [[FAT12]] file system, unknown logical geometry and FAT ID) -->.{{r|Sirius1_Specs|Victor_1983_Technical_Reference|Victor_1982_Technical_Reference|Sargent_1988}}  The GCR code is identical to the Commodore one.<ref>{{cite web |title=Victor 9000 format |website=DiscFerret wiki |url=https://discferret.com/wiki/Victor_9000_format |access-date=2024-07-19}}</ref>