Am 13.04.2017 um 11:44 schrieb d tbsky:
2017-04-13 17:09 GMT+08:00 Reindl Harald <h.reindl@xxxxxxxxxxxxx>:
Am 13.04.2017 um 10:13 schrieb d tbsky:
Hi:
I just tried to install rhel 7.3 on a 4 disk raid6. it's a
minimal install but took 3 hours to finish. I found the disk
initialize speed is around 150MB/sec. in past the disk initialize
speed will down to slow speed when there are other disk IO, but it
seems not the case in rhel 7.3.
I have check the below parameter:
cat /proc/sys/dev/raid/speed_limit_min -> 1000
cat /proc/sys/dev/raid/speed_limit_max -> 200000
when the system is idle, the init speed is also about 150M/sec, so
the system is use all the power to init when there are other disk IO.
is it normal? where should I check?
sysctl.conf:
dev.raid.speed_limit_min = 10000
dev.raid.speed_limit_max = 50000
sysctl -p
and it will adjust itself within seconds - the same works if that values are
too low and raid-check would take forever
hi: my problem is the speed is too high, not too low...
and?
you said it is at 200000
i showed you how to reduce it to 50000 or whatever you want
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