Re: Determine tape drive model

No.

You could "assume" that you have them all configured, and configured 
right, and try WRKDEVD *TAP.  But that isn't a safe bet.

You could try a WRKHDWRSC *STG.  Sample:
...
Resource        Type-model  Status                Text
CMB01            2844-001   Operational           Storage Controller 
  DC09           2780-001   Operational           Storage Controller 
  DC01           2757-001   Not detected          Storage Controller 
  DC04           2757-001   Not detected          Storage Controller 
  DC10           2780-001   Operational           Storage Controller 
  DC07           2757-001   Not detected          Storage Controller 
  DC12           2780-001   Operational           Storage Controller 
CMB02            268C-001   Operational           Combined function IOP
  DC02           6B02-001   Operational           Storage Controller 
CMB04            2844-001   Operational           Storage Controller
  DC05           2757-001   Not detected          Storage Controller
  DC11           2780-001   Operational           Storage Controller
  DC13           2749-001   Operational           Storage Controller
  DC14           2749-001   Operational           Storage Controller
  TAPMLB11       3581-017   Not detected          Tape Library 
CMB06            2844-001   Operational           Combined function IOP
  DC03           5704-001   Operational           Tape Controller 
CMB07            2843-001   Operational           Storage Controller 
  DC06           5704-001   Operational           Tape Controller 
CMB08            2843-001   Operational           Combined function IOP
  DC08           5704-001   Operational           Tape Controller 
  TAPMLB01       3582-001   Operational           Tape Library 
CMB11            2844-001   Operational           Combined function IOP
  DC15           2780-001   Operational           Storage Controller 
  DC16           5704-001   Operational           Tape Controller 

Then drill down into the 2780's, 2749's and 5704's and whatnot with 9=Work 
with resource.

Sample 1/4"
Resource        Type-model  Status                Text 
DC09             2780-001   Operational           Storage Controller 
  DD013          4327-070   Operational           Disk Unit 
  DD001          4327-074   Operational           Disk Unit 
  DD002          4327-074   Operational           Disk Unit 
  DD003          4327-072   Operational           Disk Unit 
  DD004          4327-072   Operational           Disk Unit 
  OPT02          6330-002   Operational           Optical Storage Unit
  TAP01          6384-001   Operational           Tape Unit 

Sample 3582-H23
Resource        Type-model  Status                Text 
DC03             5704-001   Operational           Tape Controller
  TAP02          3580-002   Operational           Tape Unit 
Not very descriptive, is it?

Rob Berendt