It transactions were not very long, before and after switched on option "async log service".
Principal thought- this operation good works without option "async log service".(rollback operation good works too )
I describe when and why we included this option at the beginning topic.
About yours questions
use <dbname>
go
select @@maxpagesize----------------8k
go
sp_logiosize----------16k(because we are use 16k pool in log cache)
go
And yes, we bound our log with table syslog our database.
All log segment size 32Gb,fullness of log device at time when was rollback - 15%.
We have only parts of sysmon(ending works) with long rollback.