eSata HD not being auto-detected after recent upgrade

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Assigned to dbus
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This seemed to go away and then happened again. I am able to get Ubuntu to detect my hard drive by running this command.

apt-get install scsitools
sudo rescan-scsi-bus.sh

It is then detected and mountable. Before this nothing is showing up in dmesg to indicate the drive exists or that dbus noticed it being plugged or unplugged.

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

I'm having the exact same problem (although on Ubuntu 11.10). When I connect my HDD drive to eSATA port nothing happens. There are no information in dmesg or fdisk. Interestingly, if I connect my HDD before turning the computer on, the disk is recognized and mounted automatically.

After executing 'sudo rescan-scsi-bus' the hard drive is recognized, but I'd really like to see a better solution for this problem, especially since everything worked correctly on Ubuntu 11.04.

I have the same problem in Ubuntu 13.04. Running sudo rescan-scsi-bus makes me use the drive. Also in ubuntu 12.04 sometimes I noticed this problem, but in Ubuntu 13.04 this problem is present all the time. I also noticed that connecting it while using Win 7 and then reboot to ubuntu leaves the drive recognized, and after then unplugging/plugging the drive works...
I was writing this comment after I installed scsitools, run rescan-scsi-bus, saw that the drive was recognized, mounted and umounted it, let it go in powersave mode, when suddenly the drive waked up on his own. It never did something like this. Maybe cause of scsitools?

Michele it would be help if you were to try debugging this issue using the command 'ubuntu-bug storage' in a terminal as this will run some local tests on your system and create a new bug report for you. Please let me know that new bug number. Thanks!

Ok, strangely after I installed scsitools Ubuntu started to see the disk properly. I don't know why, but I will run some tests and if I'll see that the problem comes back I'll open a new bug.