有一次临时需要mini sd卡，手边没有空余的，就把树莓派正在用的一张卡拿来救济。

先把这张树莓派系统的卡进行备份，写入 rassby.img 文件。

我记得当时写入是用的win32 Disk Imager软件

在完成临时任务后（大约半年后），将系统写回到Mini sd卡。

这里还碰到了问题，就是因为那张卡被用来测试ESP32C3下的 tf卡写入操作，所以Windows下是认不出来的。这里情况比较复杂，其实这张卡后来被用于写FreeBSD的启动盘，另外这张卡比较老了，读写都容易出问题，所以才导致Windows下无法识别盘符。

只好到FreeBSD下进行写入操作，使用dd

# dd if=FreeBSD-{rel-latest}-RELEASE-amd64-memstick.img of=/dev/da0 bs=1M conv=sync

写完后插入树莓派，一次启动成功！

Linux rbpi 6.6.51+rpt-rpi-v7 #1 SMP Raspbian 1:6.6.51-1+rpt3 (2024-10-08) armv7l

The programs included with the Debian GNU/Linux system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.

ifconfig
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.0.99  netmask 255.255.255.0  broadcast 192.168.0.255
        inet6 fe80::ba27:ebff:fe81:6646  prefixlen 64  scopeid 0x20<link>
        inet6 2409:8a3c:40c0:3488:ba27:ebff:fe81:6646  prefixlen 64  scopeid 0x0<global>
        ether b8:27:eb:81:66:46  txqueuelen 1000  (Ethernet)
        RX packets 274  bytes 34092 (33.2 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 170  bytes 22216 (21.6 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0