[mythtv-users] monthly madam checkarray kills recordings

[Jerry]

On Sun, May 6, 2018 at 7:23 PM scram69 <scram69 at gmail.com> wrote:

>
>
> On Sun, May 6, 2018 at 2:26 PM, Gary Buhrmaster <gary.buhrmaster at gmail.com
> > wrote:
>
>> On Sun, May 6, 2018 at 4:27 PM, scram69 <scram69 at gmail.com> wrote:
>> > It's the first Sunday of the month, so I've just gone through the first
>> raid
>> > checkarray re-sync on Ubuntu 18.04, having just upgraded from 14.04.
>> > /etc/cron.d/mdadm runs checkarray with the --idle argument, presumably
>> so as
>> > not to kill disk performance for other processes.
>> >
>> > However, during the array check, all recordings failed with
>> > threadedfilewriter errors:
>>
>> "Idle" has different meanings to different apps.
>> You might want to throttle the max i/o rate for
>> sync (a good value will depend on your devices)
>>
>>     dev.raid.speed_limit_max
>>
>> is likely the sysctl to look at.
>>
>
> Thanks Gary.  I still have my old 14.04 system drive mounted.  Before I
> sysctl -w dev.raid.speed_limit_max=some_small_number, do you know where I
> might be able to find what the max speed limit was under Ubuntu 14.04?
>

cat /proc/sys/dev/raid/speed_limit_max

should do it :)
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