How can you tell if a pst is still migrating

Folks

Ive a few psts that are big enough in size 12-15gigs that im migrating using a server driven migration.

Theres 3 left out of 49 that are still in a status "migrating"

I know they are big and could take a while but my question is...Apart from the migrating status...is there anyway to check if theres anything happening..is there a counter anywhere i can take a look at just to make sure there not dead?

Declan