How Smoke Alarms Work. Smoke alarms, which are also called smoke detectors, work by constantly checking the air for traces of the gasses and smoke particles produced by a fire. There are two types of smoke alarms-ionization alarms and photoelectric alarms.moke alarms, which are also called smoke detectors, work by constantly checking the air for traces of the gasses and smoke particles produced by a fire.
Exporting items from OST to PST is the best way to create backup of OST file. If you are connected with Exchange server, you can easily do this via manual method. In other case, you should try some third party tool.
Possible setups for recovery include: 1  Recover the files to a separate hard drive. 2  Recover the files to a networked storage drive. 3  Recover the files to a separate partition on the same hard drive.  Image the hard drive using a tool like ddrescue and recover files using only one partition.