Found format "ibm"
PLL Parameters: period_adj=5% phase_adj=60%
Side 0:
 T0-79: IBM-MFM DD (9 512-byte sectors, 4608 bytes)
 T80-83: Unformatted
Side 1:
 T0-66: IBM-MFM DD (9 512-byte sectors, 4608 bytes)
 T67-77: IBM-MFM DD (8 512-byte sectors, 4096 bytes)
 T78-79: IBM-MFM DD (9 512-byte sectors, 4608 bytes)
 T80-83: Unformatted