[6.9.2] Parity Drive will not spin down via GUI or Schedule
Since upgrading to 6.9.2 I cannot spin down parity via GUI, as soon as I spin down it comes back up.
Apr 8 10:18:45 Tower emhttpd: spinning down /dev/sdf
Apr 8 10:18:58 Tower SAS Assist v0.85: Spinning down device /dev/sdf
Apr 8 10:18:58 Tower emhttpd: read SMART /dev/sdf
Revert to 6.9.1 issue no longer happens.
I can manually spin down the drive. All other array drives which are also SAS spin down fine.
root@Tower:~# sg_start -rp 3 /dev/sdf
root@To
Minor
That message is output as a result of seeing I/O on partition 1 of the device. That is, code has detected I/O counters have incremented since the last time they were checked (polled every second). If there has been I/O to partition 1 then we assume the device must be spun-up. The 'read SMART' command is then issued to get the device temperature.
Specifically it looks at
/sys/block/sdb/sdb1/stat
Then adds the 3rd and 7th values (sectors read and sectors written).