[cctalk] Re: ST-251 MFM Hard Drive sector size question

I am pretty sure it is soft sectored so that is strictly a controller function see: APPENDIX 1: 32-Sector, 256-ByteiSector Format Example ............ 25 http://www.bitsavers.org/pdf/seagate/mfm/ST-251/36016-001A_ST251_OEM_Manual… tom -----Original Message----- From: Mike Katz <bitwiz(a)12bitsbest.com> Sent: Monday, November 17, 2025 1:33 PM To: General Discussion: On-Topic and Off-Topic Posts <cctalk(a)classiccmp.org> Subject: [cctalk] ST-251 MFM Hard Drive sector size question I have an ST-251 42MB MFM hard disk drive. The documentation says the drive is 512 bytes per sector. I don't know if this is fixed (hard sectored) or not. My problem is my operating system (OS/9 Level II) wants 256 bytes per sector. The OMTI 20C-1 controller can handle that but I'm not sure if the ST-251 can. Does anyone know if the ST-251 can support 256 bytes per sector and/or how to configure it for 256 bytes per sector? Thank you, Mike