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MISC-TN-017: Persistent storage and read-write file systems

1 byte removed, 09:39, 17 May 2022
→‎Device's built-in advanced functionalities
As explained in [[#Embedded Linux systems with eMMC or SD cards|this section]], e.MMC feature specific registers for monitoring the health of the device. Some of these registers provides a
Following is a dump of the standard registers of the targte's e.MMC related to the wear-out status of the device, namely <code>DEVICE_LIFE_TIME_EST_TYP_B</code>, <code>DEVICE_LIFE_TIME_EST_TYP_B</code>, and <code>PRE_EOL_INFO</code>.:<pre class="board-terminal">
root@desk-mx8mp:~# mmc extcsd read /dev/mmcblk2 | grep LIFE
 
eMMC Life Time Estimation A [EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_A]: 0x01
 
eMMC Life Time Estimation B [EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_B]: 0x01
 
root@desk-mx8mp:~# mmc extcsd read /dev/mmcblk2 | grep EOL
eMMC Pre EOL information [EXT_CSD_PRE_EOL_INFO]: 0x01
</pre>
eMMC Pre EOL information [EXT_CSD[ 2541.032394]  mmcblk2: _PRE_EOL_INFO]: 0x01 TBD It is worth remembering that some providers use the additional proprietary registers to provide information about the amount of data that have been actually written on to onto the device. If available, this number allows to calculate the WAF as the amount of data written by the applications of the test workload is know known as well.
=Power failures=
U0001
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