Qvis Pioneer-4 User Manual page 60

Remark: when the current resolution is over the max resolution that the
channel supported, then a red "X" will be shown on the preview image:
19.9 Advanced
Manage tools menu including: HDD manage, account manage, online user, output
adjust, auto maintain, upgrade.
19.9.1 HDD Manage
Configure and manage the hard disk. The menu displays current hard disk
information: hard disk number, input port, type, status and overall capability. The
operation include: setup the write-read disk, read-only disk, redundant disk, hard
disk format, resume default. Choose the hard disk and click the right function button
to execute.
Note：Read/Write Disk: The equipment can write or read data.
Read-only Disk: The equipment can read data but can not write data.
Redundant Disk: Double backup the video files in the write-read disk.
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