[Bug 799312] Re: /etc/hdparm.conf works only for /dev/sdX and not for their symlinks

[Ewano]

This bug is *still* in precise pangolin - and the fix worked a charm. In
chasing this one down it looks like it's been around *AND FIXED* since
April 2008 but the fix has never been carried forward.

Other bugs list very similar fixes:
222458
227705

What is the process by which a fix such as this can be moved into the
official code base?

For others following:

This fix allows me to set a USB hard drive to spindown using
hdparm.conf, with out needing to know what /dev/sdX it will end up
coming under.  I used a combination of the Disk Utility and ls -1
/dev/disk/by-id/* to find the devices manufacturer unique id

Then added:

/dev/disk/by-id/<your specific disk identifier here> {
       spindown = 241
}

to my hdparm.conf and it works fine under ubuntu 12.04 beta with this
patch - no matter what order I plug in usb storage.

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https://bugs.launchpad.net/bugs/799312

Title:
  /etc/hdparm.conf works only for /dev/sdX and not for their symlinks

Status in “hdparm” package in Ubuntu:
  Confirmed

Bug description:
  Binary package hint: hdparm

  Setting hard drive parameters in /etc/hdparm.conf  finally seems to work since Ubuntu 10.10, if (and only if) you specify the drives like /dev/sda, /dev/sdb, .... . Since the /dev tree is build dynamically by udev, you can't be sure, that the parameters specified this way are applied to the correct hd. However it is would be safe to use the correspondent symlinks in /dev/disk/by-uuid or /dev/disk/by-id to define your hd.
  A partial fix was given in #222458. But since then the hdparm script files have changed and it worked only with symlinks to the drive itself and not with symlinks to its partitions (like in /dev/disk/by-uuid). 
  I attach a patch based on #222458, which should fix the above described problems for 10.10 and 11.04.

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