Ubuntu 18.04.2 unresponsive on hd activity

[Ralf Mardorf]

On Mon, 25 Feb 2019 11:45:04 +0100, Oliver Grawert wrote:
>hi,
>Am Sonntag, den 24.02.2019, 21:47 -0600 schrieb nibbli at gmx.de:
>> Hello,
>> When stuff is written to hd, my Ubuntu 18.04.2 gets kind of
>> unresponsive.
>> 
>> To reproduce:
>> echo /dev/zero > test
>>   
>are you sure you dont mean "cat /dev/zero >test" ? 
>
>the above would just echo the string "/dev/zero"
>into the file "test" ;)

It's even more worse that writing 9 chars (instead of tons of zeros)
requires "CTRL+C" before any other program could start. Using the
slowest HDD ever, let alone a SSD, it should be impossible to push
"CTRL+C" before writing 9 chars finished. If the OP is able to run the
echo line and to stop it using "CTRL+C" before it finished, something is
really fishy.