How to enable Permanent hdparm setting in Jessie?

March 6, 201610 yr

Hi.

I'm using CubieTruck with Armbian Jessie, attached with a Sata disk.

I have tried these method to run hdparm when the system reboots, but none of them was successful.

Finally, I chose the /etc/rc.local file, and add the hdparm command.

hdparm -B 127 -S 242 /dev/sda

However, it is not working always.

I rebooted several times, and check the APM status with 'hdparm -B /dev/sda', the results vary.

Sometimes it shows APM_level = not supported, but some other times APM_level = 127, as I specified.

I don't know what was wrong about the command.

** I've found out that hddtemp(which is used everytime I log on to Armbian, by /etc/update-motd.d/30-sysinfo) 'sometimes' resets the apm level.

Beside the other methods, I want to know why /etc/hdparm.conf does not work.

I added these lines in hdparm.conf.

/dev/disk/by-id/ata-SAMSUNG_HD103SJ_S246J1RZB00034 {
apm = 127
spindown_time = 242
}

However, it does not work at all.

Can anyone give a clue?

April 4, 201610 yr

Hi,

I had the same problem, tryed everything but the disk "keeps forgetting" apm params.

The only solution (=patch) I could find is setting a cron job to re-record params every 10 minutes

#!/bin/bash

#hdparm -S starts disk, send only if already spinned up

if /sbin/hdparm -C /dev/diskX | grep "active" > /dev/null; then

/sbin/hdparm -S120 /dev/diskX

touch /tmp/disksaving

if /sbin/hdparm -C /dev/diskX | grep "standby" > /dev/null; then

touch /tmp/disksaving

/sbin/hdparm -B255 /dev/diskX

touch /tmp/disksaving is a quick&dirty way to check last run

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