Assuming you mean on an IBM compatible with IDE drives???
The ribbon cable should have two connectors on one end and one connector on the other. The single end should be plugged into the motherboard or disk controller. The OTHER end should be plugged in to the two hard drives. MAKE SURE YOU PAY ATTENTION TO THE ORIENTATION OF THE PLUGS!!!
The boot disk drive should have the jumpers set to "master", and the second disk drive should be jumpered as "slave". Next, just connect the power to both drives and you're ready to go.
UNFORTUNATELY...
there are many newer motherboards that only have a single IDE socket. That becomes a problem when you need to connect a CD/DVD. With a single IDE socket you can connect a hard drive and a CD/DVD, but not a second hard drive.
You'll need to check your hardware to see what you have.
OR
If your computer uses the somewhat newer/faster SATA drive, you should have 2 SATA ports on your motherboard. Plug a cable into each, and a drive into each cable. Note that not all motherboards will have 2 SATA ports, so you may need to purchase a SATA multiplier.
Six Hard Disk.
how do connect two hard driver
EIDE interfaces can support up to four hard disks at 137 GB per disk
Don't think it is possible
The hard disk drive platter is used to store magnetic data or information that comes from the hard disk drive, where they are stored. The hard disk drive can contain one or more hard disk platter.
hard-disk
Get a USB adaptor.
Hard Disk Drive (HDD) is, and should be connected to a SATA (Serial Advanced Technology Attachment) or PATA(Parallel Advanced Technology Attachment). Connecting to one of these ports will enable the motherboard, or rather the whole computer to read the hard disk drive. Also, it should be connected to one of the power supply cables to be able to power up the hard disk. Sometimes, there are attachments or enclosures that enables the hard disk to connect to a computer using USB.
It is called RAID (redundant array of inexpensive disks).
(The following assumes that the hard disk is still in working condition.) If the hard disk is in a computer, you can connect it with another computer over a network, and copy the files over the network. You can also connect the old hard disk to your new computer (using a second hard disk cable); in this case, if you manage to make it work, you can copy the files from one disk to another. In this case, the copying itself should be much faster than copying files over a network.
Hard Disk Drive (HDD) is, and should be connected to a SATA (Serial Advanced Technology Attachment) or PATA(Parallel Advanced Technology Attachment). Connecting to one of these ports will enable the motherboard, or rather the whole computer to read the hard disk drive. Also, it should be connected to one of the power supply cables to be able to power up the hard disk. Sometimes, there are attachments or enclosures that enables the hard disk to connect to a computer using USB.
to connect storage devices such as hard disk drives to a PC