Hot swap of bay devices [IBM T30]

[Tobias Roth]

encouraged by the recent reports of hot-swapping bay devices, i
tried the following on my IBM T30 (recent -current):

 - booting with the drive
 - atacontrol detach 1
 - removing the drive
 - reinserting the drive
 - atacontrol attach 1
 - mounting a cdrom

the above sequence works repeatedly, but with one annoyance:
whenever the drive gets inserted during runtime, the machine
starts to beep and doesn't stop until the drive gets removed.
this does not interfer with normal operation, however.

the following did not work:

 - booting without the drive
 - inserting the drive
 - atacontrol attach 1

the drive did not show up.

does anyone have an idea how

1) i can get rid of the beeping
2) how i can make the drive get recognized in scenario 2


or, are the things i tried 'improper use of atacontrol' which
can cause 'system crashes' [atacontrol(8)], and I should forget
about the whole thing?

thanks, t.