• OT: mmc life - should I worry?

    From =?iso-8859-2?Q?Kamil_Jo=F1ca?=@21:1/5 to All on Thu Jul 18 07:50:02 2024
    Recenly I bought used Dell Wyse 3040.
    Installed debian on it. Seems to work (althoug I do not use graphical
    env on it)
    I wanted to check mmc on it and I got:

    --8<---------------cut here---------------start------------->8--- root@chamsa:~# mmc extcsd read /dev/mmcblk0|grep EXT_CSD
    Device supports writing EXT_CSD_WR_REL_SET
    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]: 0x09
    eMMC Pre EOL information [EXT_CSD_PRE_EOL_INFO]: 0x01
    --8<---------------cut here---------------end--------------->8---

    If I understand "eMMC Life Time Estimation B" is at 90% "wear".
    But I do not understand what are the A/B estimations. I found something
    about SLC and MLC blocks, but I do not understand this.
    Can anyone point me to some understandable documentation?
    Should I rather install system on external usb?
    KJ

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