Promise Utility will not allow me to change the drive to unconfigured.
See below for the results of typing both 'promiseutil' and 'phydrv' into terminal.
Promise Utility
Version: 4.04.0000.42 Build Date: Aug 28, 2020
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List available RAID HBAs and Subsystems
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Type # Model Alias WWN Seq
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hba 1 * Pegasus2 R4 2000-0001-555b-e3c2 1
Totally 1 HBA(s) and 0 Subsystem(s)
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The row with '*' sign refers the current working HBA/Subsystem path
To change the current HBA/Subsystem path, you may use the following command:
spath -a chgpath -t hba|subsys -p <path #>.
Type help or ? to display all the available commands
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cliib>
cliib> phydrv
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PdId Model Type Capacity Location OpStatus ConfigStatus
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1 TOSHIBA DT01 SATA HDD 3TB Encl1 Slot1 OK Array0 No.0
2 TOSHIBA DT01 SATA HDD 3TB Encl1 Slot2 OK Array0 No.1
3 TOSHIBA DT01 SATA HDD 3TB Encl1 Slot3 OK Array0 No.2
4 TOSHIBA DT01 SATA HDD 3TB Encl1 Slot4 OK Array0 No.3
cliib>