It is Solaris.
Here are some results from the checks:
# /usr/openv/volmgr/bin/scan
************************************************************
*********************** SDT_TAPE ************************
*********************** SDT_CHANGER ************************
*********************** SDT_OPTICAL ************************
************************************************************
------------------------------------------------------------
Device Name : "/dev/sg/c0tw500104f000c8a894l0"
Passthru Name: "/dev/sg/c0tw500104f000c8a894l0"
Volume Header: ""
Port: -1; Bus: -1; Target: -1; LUN: -1
Inquiry : "STK SL500 1466"
Vendor ID : "STK "
Product ID : "SL500 "
Product Rev: "1466"
Serial Number: "557000201588"
WWN : ""
WWN Id Type : 0
Device Identifier: ""
Device Type : SDT_CHANGER
NetBackup Robot Type: 8
Removable : Yes
Device Supports: SCSI-5
Number of Drives : 2
Number of Slots : 50
Number of Media Access Ports: 5
Drive 1 Serial Number : "HU1139JNUW"
Drive 2 Serial Number : "HU1139JNUT"
Flags : 0x0
Reason: 0x0
------------------------------------------------------------
Device Name : "/dev/rmt/0cbn"
Passthru Name: "/dev/sg/c0tw500104f000c8a89el0"
Volume Header: ""
Port: -1; Bus: -1; Target: -1; LUN: -1
Inquiry : "HP Ultrium 4-SCSI H64S"
Vendor ID : "HP "
Product ID : "Ultrium 4-SCSI "
Product Rev: "H64S"
Serial Number: "HU1139JNUW"
WWN : ""
WWN Id Type : 0
Device Identifier: ""
Device Type : SDT_TAPE
NetBackup Drive Type: 3
Removable : Yes
Device Supports: SCSI-5
Flags : 0x0
Reason: 0x0
------------------------------------------------------------
Device Name : "/dev/rmt/1cbn"
Passthru Name: "/dev/sg/c0tw500104f000c8a8a1l0"
Volume Header: ""
Port: -1; Bus: -1; Target: -1; LUN: -1
Inquiry : "HP Ultrium 4-SCSI H64S"
Vendor ID : "HP "
Product ID : "Ultrium 4-SCSI "
Product Rev: "H64S"
Serial Number: "HU1139JNUT"
WWN : ""
WWN Id Type : 0
Device Identifier: ""
Device Type : SDT_TAPE
NetBackup Drive Type: 3
Removable : Yes
Device Supports: SCSI-5
Flags : 0x0
Reason: 0x0
=======================================================
=======================================================
# /usr/openv/netbackup/bin/admincmd/get_license_key
License Key Utility
-------------------
A) Add a License Key
D) Delete a License Key
F) List Active License Keys
L) List Registered License Keys
H) Help
q) Quit License Key Utility
Enter a letter: F
Enter the name of the host (default is nb-media1.bridge):
Active NetBackup Features
=========================
License Key: xxxx-xxxx-xxxx-xxxx-xxxx-xxxx-xxxx-xxxx-xxxx-x
Date Added: Jun 20, 2012 at 11:47:16
Host: nb-media1.bridge
Product: NetBackup Enterprise Server
Client count: See license certificate.
Expires: No Expiration Date
Feature: Base NetBackup
Feature: DataStore
Feature: Inline Tape Copy
Feature: StorageTek ACS Robotic Libraries
Feature: Fujitsu LMF Robotic Libraries
Feature: IBM ATL Robotic Libraries
Feature: ADIC DAS/SDLC Robotic Libraries
Feature: Microsoft RSM Robotic Libraries
Feature: Remote Media Server Support
Feature: Robotic Library Sharing Support
Feature: Remote Client Support
Feature: Open File Backup
Feature: Enterprise Vault Agent
=========================
License Key Utility
-------------------
A) Add a License Key
D) Delete a License Key
F) List Active License Keys
L) List Registered License Keys
H) Help
q) Quit License Key Utility
Enter a letter: L
Enter the name of the host (default is nb-media1.bridge):
Registered License Keys
=======================
License Key: xxxx-xxxx-xxxx-xxxx-xxxx-xxxx-xxxx-xxxx-xxxx-x
Date Added: Jun 20, 2012 at 11:47:16
Host: nb-media1.bridge
Product: NetBackup Enterprise Server
Client count: See license certificate.
Expires: No Expiration Date
Feature: Enterprise Vault Agent (Active)
Feature: Open File Backup (Active)
Feature: Remote Client Support (Active)
Feature: Robotic Library Sharing Support (Active)
Feature: Remote Media Server Support (Active)
Feature: Microsoft RSM Robotic Libraries (Active)
Feature: ADIC DAS/SDLC Robotic Libraries (Active)
Feature: IBM ATL Robotic Libraries (Active)
Feature: Fujitsu LMF Robotic Libraries (Active)
Feature: StorageTek ACS Robotic Libraries (Active)
Feature: Inline Tape Copy (Active)
Feature: DataStore (Active)
Feature: Base NetBackup (Active)
=======================
=======================
# /usr/openv/volmgr/bin/tpautoconf -t
TPAC60 HP Ultrium 4-SCSI H64S HU1139JNUW -1 -1 -1 -1 /dev/rmt/0cbn - -
TPAC60 HP Ultrium 4-SCSI H64S HU1139JNUT -1 -1 -1 -1 /dev/rmt/1cbn - -
========================================
========================================
# /usr/openv/volmgr/bin/robtest
Configured robots with local control supporting test utilities:
TLD(11) robotic path = /dev/sg/c0tw500104f000c8a894l0
Robot Selection
---------------
1) TLD 11
2) none/quit
Enter choice: 1
Robot selected: TLD(11) robotic path = /dev/sg/c0tw500104f000c8a894l0
Invoking robotic test utility:
/usr/openv/volmgr/bin/tldtest -rn 11 -r /dev/sg/c0tw500104f000c8a894l0
Opening /dev/sg/c0tw500104f000c8a894l0
MODE_SENSE complete
Enter tld commands (? returns help information)
s s
slot 1 (addr 1000) contains Cartridge = yes
Barcode = CM0041
slot 2 (addr 1001) contains Cartridge = yes
Barcode = CM0042
...
slot 50 (addr 1049) contains Cartridge = yes
Barcode = CM0072
READ_ELEMENT_STATUS complete
==================================================