Extended IDE Drive
The option description:
Here the attached device type is underlined. In old versions BIOS parameters of drives are presented in the form of the original table displaying parameters of drives. As a rule, this table contains only hard disks, and drives of other types (for example, optical disk drives) are defined later — at a stage of loading of the computer. The modern versions BIOS profess other approach: each channel of the IDE/SATA-controler of a chipset (or, for older computers, simply IDE-controler) is presented by separate menu item. Entering into it, you also see parameters of the drive connected to this channel, whether it be a hard disk or any other device.
Sometimes the considered option carries a channel title to which the given drive is connected. For example, variants can be such: [IDE Primary Master], [IDE Primary Slave], [IDE Secondary Master], [IDE Secondary Slave], [IDE Third Master], [IDE Third Slave], [IDE Fourth Master], [IDE Fourth Slave].
To begin with we consider possible variants of type of a hard disk in old versions BIOS (with the table of parameters). At a choice [Auto] automatic determination of parameters of a hard disk, value [None] will be involved specifies that the device misses. If the variant [User] is specified, possibility manually is given to you (or by means of automatic determination — автодетекта) to specify all parameters of a hard disk enumerated in columns further.
Besides presented above variants you can select from absolutely old versions BIOS and numeral values from  to , thus will automatically be filled all remaining columns of the table. This "atavism" remained since those times when hard disks only began the propagation (look at volume and all becomes clear to you). At all do not install these numeral values — is not present, you do not spoil a disk, and here the data can lose. However, this remark concerns any incorrect values of parameters of a hard disk.
Occasionally in the table of parameters of drives are presented not only hard disks, but also other ATAPI-stores. "Magic" value [Auto] solves all problems and in this case, but you can specify the necessary type of the device and manually: [CDROM] for optical disk drives or [Floptical] for remaining drives ( Iomega ZIP, LS-120, magneto-optics …).
Let’s pass now to newer versions BIOS. At a choice [Auto] care of determination of type of the drive and its parameters incurs BIOS. Value [None] (in some implementations — [Not Installed]) approaches, if the drive is not connected to this channel of the controler of a chipset or you do not want, that the connected drive was defined by means BIOS (on occasion it happens it is useful). The variant [Manual] or [User] if it is, allows to set all parameters of the drive independently. Remaining values correspond to drive type: [CD-ROM] — to an optical disk drive, [LS-120] — to the disk drive of floppy disks, compatible to standard LS-120 (120 Mbajtnye of a diskette), [ZIP] — to the device of Iomega ZIP 100, 250 or 750 Mb, [MO] — to the disk drive of magneto-optical disks (so-called magneto-optics), [Other ATAPI Device] — to all remaining devices connected to the IDE/SATA-controler.
The variant [ARMD] — ATAPI Removable Media Device — disk drive LS-120 uniting in, Iomega ZIP, magneto-optics and other similar devices is possible also.
Other options identical to destination: