Thanks for the link but therein lies the problem. On doing a dir disk0: I get a "cannot open device disk0:" with an open error = -35. If I could access my flash card in disk0: I think I can recover the switch.

I know the disk is good as I have used it on other sup engines and switches.

Is it currently in rommon? What other supervisors does the card work in?

Mark

A slight modification to my approach. I just formatted the Cisco provided disk on a different sup engine, then copied the code I want to run on this failed sup engine, then attempted the whole thing again, and it's looking good so far. Phew...a small format issue can create such a big headache...thx again for your link!

No problem. Some switches have different file formats which is probably why it didn't work before. It's generally a good idea to have cards formatted and loaded for the different supervisors you may have.

Good luck,

Mark