文件系统挂载第二个分区后文件不可访问求解？

文件系统 挂载第一个分区后，可读写
文件系统 挂载第二个分区后，文件不访问

\ | /

RT - Thread Operating System
/ | \ 4.1.1 build Jan 4 2023 05:11:20
2006 - 2022 Copyright by RT-Thread team
[I/SFUD] Find a Winbond flash chip. Size is 4194304 bytes.
[I/SFUD] W25Q32 flash device is initialize success.
[I/SFUD] Probe SPI flash W25Q32 by SPI device spi20 success.
msh />[I/SDIO] SD card capacity 15558144 KB.
found part[0], begin: 4194304, size: 14.853GB
msh />date
[I/drv.rtc] RTC hasn't been configured, please use command to config.
local time: Mon Jan 3 19:07:38 2000
timestamps: 946897658
timezone: UTC+8
msh />mount W25Q32 / elm
mount device W25Q32(elm) onto / ... succeed!
msh />ls
Directory /:
test