To avoid accidentally erasing the wrong disk, the - Disk Info menu can be used to inspect each disk, including its partition table and various other information such as the device model number and serial number, if available.
Several communication parameters must be known to communicate with a serial printer.The most important are baud rate or BPS (Bits Per Second) and parity.Values vary, but typical serial printers use a baud rate of 9600 and no parity.
Wired network connections are usually the easiest to set up and give the fastest printing.For direct connection to the computer, USB is preferred for speed and simplicity.Parallel connections work but have limitations on cable length and speed.Serial connections are more difficult to configure.Cable wiring differs between models, and communication parameters like baud rate and parity bits must add to the complexity.Fortunately, serial printers are rare.
The ACPI driver has a flexible debugging facility. A set of subsystems and the level of verbosity can be specified.The subsystems to debug are specified as layers and are broken down into components (ACPI_ALL_COMPONENTS) and ACPI hardware support (ACPI_ALL_DRIVERS).The verbosity of debugging output is specified as the level and ranges from just report errors (ACPI_LV_ERROR) to everything (ACPI_LV_VERBOSE).The level is a bitmask so multiple options can be set at once, separated by spaces.In practice, a serial console should be used to log the output so it is not lost as the console message buffer flushes.A full list of the individual layers and levels is found in acpi(4). 1e1e36bf2d