On Sat, 15 Aug 2015 00:57:42 +0100, João M. S. Silva wrote:
>If jbd2 is writing 12.8 times per min how can your disk spin down
>after 30 min?

As already pointed out, the drive in question is _sdc_, not _sdb_ [1].

Regards,
Ralf

[1]
On Thu, 13 Aug 2015 23:20:25 +0200, Ralf Mardorf wrote:
>[snip]
>A script running lm-profiler didn't find anything /dev/sdc related,
                                                        ^^^
                                                        ^^^
>while the Start_Stop and Load_Cycle counts increased.
>[snip]
>sdc   is the external green drive
>sdb11 is the Ubuntu install including all directories,
>      no separated partitions, excepted of data partitions
>
>This is the relevant part of the script's log file:
>
>[weremouse@moonstudio ~]$ grep 2015 -A4 -B21 
>/var/log/lm-profiler08Aug2015_195923.log
>Thu, 08 Aug 2015 19:59:23 +0200
>smartctl -A /dev/sdc|grep Cou|grep -v R
>[snip]           ^^^
                  ^^^
>[snip]                                   
>      4 systemd-journal
>     10 kworker/u8:2
>     45 kworker/u8:1
>     60 kworker/u8:0
>    128 jbd2/sdb11-8
>[snip]       ^^^
              ^^^

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