[cctalk] Persci 299 drives - park heads/lock?

[Bill Degnan via cctalk]

I am working on an unknown status Persci 299 drive and one of the two
drives is locked closed.  Is this a "park" of some kind or is the drive
broken?  If it's a parked drive (only the drive 0 side) how do you unpark
the drive?  I can't seem to find any info on this.  If I find anything I
will post my findings.
Thanks in advance
Bill