Comment 3 for bug 1582728

We have similar MDISK setups in our machine, but mostly 3390 0001 10016 (so mod9s),
but did not saw such a overflow situations yet.
We cpfmtxa format our disks once and label them (but with perm 0-end) - are you using cpfmtxa too ?
So 'sudo dasdfmt -b 4096 -f /dev/dasdf' recently worked for me ...

Looks like your 9336 EDEV devices (a and b) are fine.

Please can you paste your MDISK settings of the user direct (at least for the disk 0200),
the 'lsdasd -a' output
and the output of 'dasdfmt --version'?

Thanks

Nevertheless a buffer overflow is not acceptable ...