USB mont sometime failed

[SigmaTec]

Hi all,

I developed an Lua script which writes "csv" files on a USB 2.0 key.
This cyclic script performs regular "mount / umount" (every 6 hours) to guarantee the maximum number of correct files in the event of micro power cuts. 

It works fine, but I have random errors on the mount as : "mounting / dev / sda1 on / mnt failed: no such file or directory".

Do you have any explanations for this problem?

Than'k in advance for your help !


--- here is the umout/mount standard script I user ---

Code:

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devs = io.ls('/sys/class/block/') table.sort(devs) for _, dev in ipairs(devs) do   if dev:match('^sd%a%d$') then     part = dev     break   elseif not devn and dev:match('^sd%a$') then     devn = dev   end end part = part or devn if part then   os.execute('umount -f /mnt 2>&-')   res, stat = io.readproc('mount /dev/' .. part .. ' /mnt 2>&1')   if stat == 0 then     alert('USB mount OK')   else     alert('USB mount failed: ' .. tostring(res))           -----------> this line returns the random errors...   end else   alert('No valid USB devices found') end

[admin]

This cyclic script performs regular "mount / umount" (every 6 hours) to guarantee the maximum number of correct files in the event of micro power cuts. 

This does not provide any benefit. You can mount once then simply run os.execute('sync') after writing to synchronize data to disk.

[SigmaTec]

Hi Admin,

many thank for your answer.

Have a good new week !