SD works fine on Teensy 4.0 but not SdFat

[jferguson]

Problem found. I tried formatting a card with the SdFat formatter . A card formatted thus, works fine with SdFat. I had been using GParted to format cards. SD had no trouble with them on the Teensy4.0. SdFat also worked fine on the nano. but apparently SdFat runnig on T4 expects a possibly better installation. Now I have to go back and undo the probably stupid things I did to my application while I was puzzling this out.

a little strange, don't you think?

[XFer]

Bill Greiman explained time ago why it is important to use his own tools to format cards.
Honestly I can't find the thread anymore.

[jferguson]

Bill Greiman explained time ago why it is important to use his own tools to format cards.
Honestly I can't find the thread anymore.

Knowing this now, makes me want to build a little SDcard formatter with a nano.

thanks for the note. and thanks to everyone else who responded to my plight.

john

[XFer]

Just to set it straight, it's not like one needs to use Bill's tools because there's some custom proprietary stuff: quite the contrary, his tools follow very precisely the SD specifications without taking any shortcut.
Since SDFat lib follows SD specs closely, it may have problems with "lazy"-formatted cards (the vast majority).