Acronis Backup supports external SCSI devices. These are devices connected to Fibre Channel or using the SCSI, iSCSI, Serial Attached SCSI (SAS) interfaces. Also, Acronis Backup supports USB-connected tape devices.
In Windows, Acronis Backup can back up to a tape device even if the drivers for the device's changer are not installed. Such a tape device is shown in Device Manager as Unknown Medium Changer. However, drivers for the device's drives must be installed. In Linux and under bootable media, backing up to a tape device without drivers is not possible.
Recognition of IDE or SATA connected devices is not guaranteed. It depends on whether proper drivers have been installed in the operating system.
To learn if your specific device is supported, use the Hardware Compatibility Tool as described at https://kb.acronis.com/content/57237. You are welcome to send a report about the test results to Acronis. Hardware with confirmed support is listed in the Hardware Compatibility List: https://go.acronis.com/acronis-backup-advanced-tape-hcl.