There is quite useful T>[Ctrl X] terminal command on Seagate F3 drives which show last executed commands by the drive. From its output we can define non-readed LBA and sys file which located on that LBA.
Below is a simple description how to do that.
Here is an example of Ctrl X command output:
Please note that Ctrl+X command should be executed as soon as you get terminal promt after drive’s initialization.
请注意，一旦在驱动器初始化之后进入终端提示符，就应该执行Ctrl + X命令。
Also some drives can access to sys files only by full descriptor (FD). So you will not get access via File ID form, you can only select sys file by File Descriptor in list.