Difference between revisions of "EMMC/zh"

From FriendlyELEC WiKi
Jump to: navigation, search
(updated by API)
 
(One intermediate revision by the same user not shown)
Line 19: Line 19:
 
         0x02 - Warning: consumed 80% of the reserved blocks.
 
         0x02 - Warning: consumed 80% of the reserved blocks.
 
         0x03 - Urgent: consumed 90% of the reserved blocks.
 
         0x03 - Urgent: consumed 90% of the reserved blocks.
</syntaxhighlight>
+
</syntaxhighlight><br>
 +
[[File:Emmc-lifetime.jpg|frameless|500px]]<br>
 +
[[File:Emmc-preeolinfo.jpg|frameless|500px]]<br>

Latest revision as of 03:32, 20 May 2022

English

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.

Emmc-lifetime.jpg
Emmc-preeolinfo.jpg