[Bug 222458] Re: /lib/udev/hdparm Compares Against $DEVNAME.

[Launchpad Bug Tracker]

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: hdparm (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/222458

Title:
  /lib/udev/hdparm Compares Against $DEVNAME.

Status in “hdparm” package in Ubuntu:
  Confirmed

Bug description:
  Binary package hint: hdparm

  Ubuntu 7.10, hdparm 7.5-1ubuntu1.  My /etc/hdparm.conf has entries
  like

      /dev/disk/by-id/ata-ST3160023A_4JS03MMK {
          spindown_time = 60
      }

  which work just fine with /etc/init.d/hdparm.  However, it appears
  init.d/hdparm is on its way out and has been replaced with
  /lib/udev/hdparm.  That only executes hdparm(8) for bits of
  /etc/hdparm.conf that match $DEVNAME, presumably passed in by udev.  I
  guess it'll have values like /dev/sda or /dev/hda.  However, I don't
  necessarily know what the /dev name will be, so I've specified it by
  /dev/disk/by-id instead which is a symlink.

      $ stat -c %N /dev/disk/by-id/ata-ST3160023A_4JS03MMK
      `/dev/disk/by-id/ata-ST3160023A_4JS03MMK' -> `../../hda'

  It seems that /lib/udev/hdparm needs to do some readlink(1) or similar
  for each of the discs specified in /etc/hdparm.conf, e.g. `readlink -e
  /dev/disk/by-id/ata-ST3160023A_4JS03MMK' gives /dev/hda, and only then
  compare against $DEVNAME.

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