Would unexpected power failure cause SD card to be damaged ? I have several Raspberry Pi 3 Model B+ and I have installed the operating system (Raspbian Buster with desktop。Version:June 2019) and it can work normally. After a few time unplug power calble when PI still working ,PI can't read the conte...

hello
I have problem about Raspberry Pi Model 3 B.
I want to set the resolution to 2560*720.
I used parameter 「hdmi_cvt=<width> <height> <framerate> <aspect> <margins> <interlace> <rb>」
But,how to change setting to make "aspect" become "32:9"
thank you