Fix incorrect disk capacity nomenclature.

[PartialVolume]

I've always wondered, when you first view all the drives, why drives above 999GB appeared in their GB nomenclature instead of TB. For instance a 2TB drive would appear as 2000GB. Unlike in other places within nwipe that do a proper job of describing the capacity. It's just this one location in the program that is wrong.

This information was obtained by a call to a function in libparted. Maybe when libparted was written there was no such thing as a TByte drive ?? Who knows, so anyway it was far easier to use nwipes build in function called 'determine_C_B_nomenclature()' This provides us with the correct nomenclature that is a fixed number of digits (three) and prefixed with spaces so the length is always the same. In the GUI this gives a nice list when viewing multiple drives that appear in neat columns.

Below are some screenshots of the new layouts, note the following:

• New column (from a recent merge) that shows the bus type ATA/USB etc
• New calculation for disk capacity that fixes the display of TB capacity, previously was thousands of GigaBytes.
• Disk capacity has a fixed column width and prefixed with spaces to achieve the fixed width. This makes the display more visually pleasing when multiple drives are displayed, as now all the individual items now appears in fixed width columns.
• Note the model number / serial number field. To maximise the amount of limited space (i.e 80 character width as required by ShredOS, full screen terminals (ALT-F2 etc) I simply separate the model and serial number by a '/'.
• Also note, that the last two USB devices have the text (No ATA pass thru) in the serial number field. This means that the chipset used in whatever USB to IDE/ATA adapter is being used does not support ATA pass through, therefore the serial number of the drive attached to the adapter (also known as a USB bridge) can't be accessed. Without ATA pass through you also won't be able to do a disk erase using the drives firmware ( firmware erase is an nwipe future feature). If you see the text 'No ATA pass thru' you can still wipe the drive, it just means you can't see the serial number or have access to more advanced features. Maybe you should get yourself a better USB to IDE/SATA adapter. See Add serial number support for USB devices #230 and Disks plugged into USB don't show serial number, while direct SATA/IDE/SCSI do. #149 which have more details on supported chipsets and devices.