Check SD card errors

[baggins]

Here you have script for checking SD card current errors:

Code:

function checkSDCardErrors()
    f = assert (io.popen('dmesg | grep mmcblk'))
    errorsCounter = 0
    for line in f:lines() do
     isThereSDError = line:match("mmcblk*..*: (.*error*..*)")
   if isThereSDError then errorsCounter = errorsCounter + 1 end
    end
    f:close()
 return errorsCounter
end

log(checkSDCardErrors())

It can be helpful in monitoring SD card and knowing about start of problems and that it must replaced

Recently I've been hit with a read-only SD card. Could this script be used in detecting a read-only SD card?
I became aware of this after a power cut and a reboot of the LM. It appeared that the card was already in read-only mode for quite a while. As a result of this I lost quite some trend log data...