Difference between revisions of "EMMC/zh"
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Latest revision as of 03:32, 20 May 2022
1 如何检查emmc寿命 (内核4.x以上支持)
cat /sys/class/mmc_host/mmc0/mmc0\:0001/pre_eol_info cat /sys/class/mmc_host/mmc0/mmc0\:0001/life_time
节点名称不同的设备可能有所不同。
2 关于寿命的说明
Since e.MMC 5.0, device health status became part of the standard. It provides life time estimation for SLC and MLC areas as well as pre EOL status:
Device life time estimation type A: life time estimation for SLC eraseblocks, provided in steps of 10%, e.g.:
0x02 means 10%-20% device life time used.
Device life time estimation type B: life time estimation for MLC eraseblocks, provided in steps of 10%, e.g.:
0x02 means 10%-20% device life time used.
Pre EOL information: overall status for reserved blocks. Possible values are:
0x00 - Not defined.
0x01 - Normal: consumed less than 80% of the reserved blocks.
0x02 - Warning: consumed 80% of the reserved blocks.
0x03 - Urgent: consumed 90% of the reserved blocks.
