On 12/22/05, B. Degnan <billdeg at degnanco.com> wrote: Given the age and fragility of the TM602/TM603 drives, that's not surprising. If you are hearing the drive spin up (no stiction), one thing that failed on one of my Tandon drives from a D90x0 was the optical track zero sensor. I had it professionally repaired over 10 years ago for $75 including new media, back when repairing small drives was practical. In the long term, however, a new mechanism is probably your best bet. Yes. My experience is that if you strap the D90x0 board to expect 4 heads, you can use an ST-225. I _think_an ST-251 may work for a 6-head drive. Without tweaking the firmware on the "DOS Board", you are still limited in how many cylinders the drive looks for - so the capacity will not change from 5MB or 7.5MB (4 heads/6 heads). The good news is that ST225 drives were uber-plentiful back in the day, so it still shouldn't be difficult to find, for an ST506/ST412-interface drive. I save every ST-225 and ST-251 that happens past, largely for things like the D90x0 and DECmate IIs, etc. Give a Seagate drive a try - it should work for you. -ethan