RockChip 3399 （Android7.1.2）生产问题 总结

RK3399 问题点总结

本次生产发现一些 平时开发遇不到的问题：

• system分区挂载失败
• storage/emulated目录不存在

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分区挂载失败

关键log：
[ 4.489418] fec: <215> warning: parse_ecc_header: ecc data not valid
[ 4.553015] random: nonblocking pool is initialized
[ 4.621784] fec: <216> warning: __ecc_read: RS block 5263360: decoding failed
[ 4.705423] fec: <217> warning: __ecc_read: RS block 5414912: decoding failed
[ 4.790600] fec: <218> warning: __ecc_read: RS block 0: decoding failed
[ 4.805404] fec: <219> warning: __ecc_read: RS block 5414912: decoding failed
[ 4.381269] fs_mgr: Failed to get verity metadata
‘/dev/block/platform/fe330000.sdhci/by-name/system’ (I/O error)

正常时：
[ 4.310741] fec: <213> warning: __ecc_read: RS block 5263360: corrected 4 errors
[ 4.344882] fec: <214> warning: __ecc_read: RS block 5263360: corrected 4 errors
[ 4.585764] fec: <216> warning: __ecc_read: RS block 5263360: corrected 4 errors
[ 4.622064] fec: <217> warning: __ecc_read: RS block 5263360: corrected 4 errors
[ 4.622297] fs_mgr: Attempt to cleanly disable verity - only works in USERDEBUG
[ 4.624775] fs_mgr: Verity disabled
[ 4.634069] EXT4-fs (mmcblk1p10): mounted filesystem with ordered data mode. Opts: noauto_da_alloc
[ 4.634175] fs_mgr: __mount(source=/dev/block/platform/fe330000.sdhci/by-name/system,target=/system,type=ext4)=0

FEC是什么？
维基百科 FEC forward error correction ,

整个dm-verity流程梳理一下：

dump system.img对比，
重新烧录 正常挂载，

storage/emulated目录不存在

主要应为首次启动 异常断电造成。