我们的系统会生成一个 UBI 分区，该分区在首次启动时在 NAND 中创建。系统能够在那里读取和写入文件。我正在尝试创建一个可供 NAND“帮派”程序员使用的二进制文件，以便我们可以使用一些文件对该分区进行预编程。
我创建一个文件夹/火灾结构并使用以下两个命令：
mkfs.ubifs -r ./files -m 2048 -e 126976 -c 2047 -o ubifs.img
ubinize -o ubi.img -m 2048 -p 128KiB -s 2048 ubinize.cfg
ubinize.cfg:
[files]
mode=ubi
vol_id=0
vol_type=dynamic
vol_name=fs
vol_flags=autoresize
image=ubifs.img
为了测试我的文件，我使用 uboot 在正确的偏移处编写 ubi.img 并启动系统。系统找到新的UBIFS分区，其中包含有效文件！耶！
问题：当我更改分区中的任何内容，甚至触摸新文件并重新启动时，分区无法挂载，并声称存在大量 ECC 错误：
$ log | grep UBI
05:00:59 PM [ INFO] [ kernel] UBIFS: background thread "ubifs_bgt1_0" started, PID 306
05:00:59 PM [ WARNING] [ kernel] UBI warning: ubi_io_read: error -74 (ECC error) while reading 126976 bytes from PEB 3:4096,
05:00:59 PM [ WARNING] [ kernel] UBI warning: ubi_io_read: error -74 (ECC error) while reading 126976 bytes from PEB 3:4096,
05:01:00 PM [ WARNING] [ kernel] UBI warning: ubi_io_read: error -74 (ECC error) while reading 126976 bytes from PEB 3:4096,
05:01:00 PM [ ERROR] [ kernel] UBI error: ubi_io_read: error -74 (ECC error) while reading 126976 bytes from PEB 3:4096,
05:01:00 PM [ ERROR] [ kernel] UBIFS error (pid 304): ubifs_scan: bad node
05:01:00 PM [ WARNING] [ kernel] UBI warning: ubi_io_read: error -74 (ECC error) while reading 126976 bytes from PEB 3:4096,
05:01:00 PM [ WARNING] [ kernel] UBI warning: ubi_io_read: error -74 (ECC error) while reading 126976 bytes from PEB 3:4096,
05:01:01 PM [ WARNING] [ kernel] UBI warning: ubi_io_read: error -74 (ECC error) while reading 126976 bytes from PEB 3:4096,
05:01:01 PM [ ERROR] [ kernel] UBI error: ubi_io_read: error -74 (ECC error) while reading 126976 bytes from PEB 3:4096,
05:01:01 PM [ WARNING] [ kernel] UBI warning: ubi_io_read: error -74 (ECC error) while reading 126976 bytes from PEB 4:4096,
05:01:01 PM [ WARNING] [ kernel] UBI warning: ubi_io_read: error -74 (ECC error) while reading 126976 bytes from PEB 4:4096,
05:01:01 PM [ WARNING] [ kernel] UBI warning: ubi_io_read: error -74 (ECC error) while reading 126976 bytes from PEB 4:4096,
05:01:02 PM [ ERROR] [ kernel] UBI error: ubi_io_read: error -74 (ECC error) while reading 126976 bytes from PEB 4:4096,
05:00:00 PM [ ERROR] [ kernel] UBIFS error (pid 304): ubifs_recover_master_node: failed to recover master node
05:00:00 PM [ ERROR] [ kernel] UBIFS error (pid 304): ubifs_recover_master_node: dumping first master node
05:00:00 PM [ INFO] [ kernel] UBIFS: background thread "ubifs_bgt1_0" stops
[截屏]
我有什么想法搞砸了创建我的 UBI 图像吗？
答案1
实时调频！ -F 参数修复了我上面列出的错误。
http://www.linux-mtd.infradead.org/faq/ubifs.html#L_free_space_fixup
此外，ubi_reader 工具对于理解 mkfs 和 ubinize 中的各种参数也有很大帮助。