  6:00	sync
  1:fe	idam
  1:xx	cyl
  1:xx	side
  1:xx	sector
  1:xx	size
  2:xx	crc
 11:ff	gap
  6:00	sync
  1:fb	dam
128:e9	data
  2:xx	crc
 27:ff	gap

188

  16*188=3008
  16*128=2048

  26*188=4888
  26*128=3328

 FM 300 RPM  5 RPS  1/5 second/REV  250 kbits/sec  25,000 bits/track  3125 bytes/track
 FM 360 RPM  6 RPS  1/6 second/REV  500 kbits/sec  83,333 bits/track  5208 bytes/track
 FM 300 RPM  5 RPS  1/5 second/REV  500 kbits/sec  50,000 bits/track  6250 bytes/track

 12:00	sync
  3:a1
  1:fe	idam
  1:xx	cyl
  1:xx	side
  1:xx	sector
  1:xx	size
  2:xx	crc
 22:4e	gap
 12:00	sync
  3:a1
  1:fb	dam
256:e9	data
  2:xx	crc
 54:ff	gap

372

  16*372=5952
  16*256=4096

  26*372=9672
  26*256=6656

MFM 300 RPM  5 RPS  1/5 second/REV  250 kbits/sec  50,000 bits/track    6250 bytes/track
MFM 300 RPM  5 RPS  1/5 second/REV  500 kbits/sec  100,000 bits/track  12500 bytes/track
MFM 360 RPM  6 RPS  1/6 second/REV  500 kbits/sec  83,333 bits/track   10416 bytes/track

  9*512=4608
  9*628=5652  (assuming 372+256 for 512BPS)

 18*512=9216
 18*628=11304 (assuming 372+256 for 512BPS)

 16*628=10048 (assuming 372+256 for 512BPS)


 SIZE	Cap	SPT	SectSZ	Cyl	HDs	RPM	KB/S	Mode	Needed	Actual	Extra

 8SSSD	 250.25	26	128	77	1	360	500	 FM	 4888	 5208	 320
 8DSDD	1001	26	256	77	2	360	500	MFM 	 9672	10416	 744

 5DSSD	 320	16	128	80	2	300	250	 FM	 3008	 3125	 117
 5DSDD	 640	16	256	80	2	300	250	MFM	 5952	 6250	 298
 5DSHD	1280	16	512	80	2	360	500	MFM	10048	10416	 368

 3DSDD	 720	9	512	80	2	300	250	MFM	 5652	 6250	 598
 3DSHD	1440	18	512	80	2	300	500	MFM	11304	12500	1196

 3DSHD	 640 	32	128	80	2	300	500	 FM	 6016	 6250	 234
 3DSHD	1280 	32	256	80	2	300	500	MFM	12032 	12500	 468

(these use 128 FM on Track 0 (so, half a big track substracted from total)

 8DSDD	 997.5	26	256	77	2	360	500	MFM 	 9672	10416	 744

 5DSDD	 638	16	256	80	2	300	250	MFM	 5952	 6250	 298
 5DSHD	1278	16	512	80	2	360	500	MFM	10048	10416	 368

 5DSHD	1036.75	26	256	80	2	360	500	MFM 	 9672	10416	 744

 3DSHD	1276 	32	256	80	2	300	500	MFM	12032 	12500	 468 