Areca 24/4 Internal/External Port Pcie 3.0 12 Gb/s SAS/SATA Raid Controller 2Gb Cache - Manual (Page 173)

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WEB BROWSER-BASED CONFIGURATION
6.8 Physical Drive
Choose this option to select a physical disk from the main menu
and then perform the operations listed below.
6.8.1 Create Pass-Through Disk
To create pass-through disk, move the mouse cursor to the main
menu and click on the “Create Pass-Through” link. The relative
setting function screen appears. You can select one, dual or three
disks for pass-through disk function. A mirrored pass-through
mode means controller will be regarded as the hard disk clone
function, a host’s data will write simultaneously into two or three
hard disks in the RAID controller. If you combine an SSD and
HDDs in a mirrored pass-through hybrid solution, you can get all
the reads from the SSD with SSD speed. A pass-through disk is
not controlled by the SAS RAID controller firmware, it can’t be a
part of a volume set. The disk is available to the operating system
as an individual disk. It is typically used on a system where the
operating system is on a disk not controlled by the RAID firm -
ware. The user can also select the Volume Cache Mode, Write Pro-
tection, Tagged Command Queuing, and SCSI channel/SCSI_ID/
SCSI_LUN for this pass-through disk.
6.8.2 Modify Pass-Through Disk
Use this option to modify the pass-through disk attribute. The
user can modify the Cache Mode, Write Protect, Tagged Command
Queuing, and SCSI Channel/ID/LUN on an existing pass-through
disk.