Michael Weber: Random Bits and Pieces

Time Machine Icon Click-click
Click-click who?
Click-click, dead hard disk, harbinger of panic attacks.

Thankfully, I am somewhat battle-hardened in this regard, and I had been using Apple's Time Machine as backup strategy. Even more lucky, I recently bought a NAS solution which automates backups completely and allowed me to forget about them.

The only remaining thrill was that until now, I did not get around verifying that a full restore actually works. However, Restoring from Time Machine delivers as advertised. A couple of hours after exchanging the hard disk, everything was back up again.

There are two small snags I encountered, though. First, the MacOS X installer does not recognize a completely empty hard disk. I used the Disk Utilities application (from the Utilities menu) to format the hard disk.

Second, while this is good enough for the installer to work, the Restore application still does not see the (now-formatted) hard disk. It helped to go back to the initial dialog of the installer (in which the language can be selected) and then go forward until I could choose Restore System from Backup (again from the Utilities menu).

We have released version 1.3 of LTSmin. The following improvements have been implemented:

  • Regrouping optimizations of the PINS matrix
  • Connection to the CADP toolkit via pins_open
  • Tuning of the BDD usage
  • Significant performance improvements
  • Symbolic deadlock detection and trace output

The source code, installation instructions and manuals are available online:


LTSmin is currently being developed by the Formal Methods and Tools group at the University of Twente, The Netherlands.

The previous release was LTSmin 1.2.