Dear Maintainer,

TL;DR: could /usr/lib/udev/hdparm maybe log to journald?

I added the following entry to /etc/hdparm.conf

/dev/sda {
    read_ahead_sect = 4096
}

But apparently there were no changes to the disk after reboot (hdparm -a
/dev/sda showed no changes).

I executed DEVNAME=/dev/sda bash /usr/lib/udev/hdparm manually without
any luck.

When looking into the script I noticed that errors are ignored.

https://sources.debian.org/src/hdparm/9.65%2Bds-1.1/debian/udev-scripts/hdparm#L46

      /usr/sbin/hdparm -q $OPTIONS $DEVNAME 2>/dev/null

When running the command by hand I got the error:

      /usr/sbin/hdparm -q -a4096 /dev/sda
        -a: bad/missing filesystem-read-ahead value (0..2048)

So I had to adjust the config value.

If I would have seen the error message, maybe I would have noticed earlier.

Maybe the script could log errors to journald? Maybe something like this?

      /usr/sbin/hdparm -q $OPTIONS $DEVNAME 2>&1 | systemd-cat
--identifier=hdparm.conf --priority=warning


Thank you,

Ben