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hard drive pin configuration - cable select ?

Channel Hopper

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#1
I forgot to ask this last year and shelve the PC for a short while

Is there a hard and fast rule as to how the pin configuration works on PCs

Ive always set the primary on main, and secondary with a slave drive when I want to transfer data over. But this PC has the main drive set to 'cable select', even though its never been on a network.

What are the rules and exceptions, and is there an advantage of one over the other ?
 

jimbo

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#2
Cable select is supposed to be a simpler way of connecting drives to save the bother of shifting jumpers around. The cables look like the normal IDE cable but are actually special ones which carry a cable select signal. I believe if the cable is not this special type then the system uses the more conventional master/slave relationship.
 

Channel Hopper

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#3
Thanks

I noticed the IDE cable does have much thinner wiring than the normal, and there are approximately double the number of wires in the ribbon.

Will start googling for advice
 

stealthpirate

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#4
Primary and secondary IDE channels can have a Master and a Slave on each Channel, or a Master or Single on each channel (not a slave alone on one channel, though it would prolly work).
The cable you have is a 80 pin udma cable for transfer rate above 33mb.s, i.e 66/100mb.s mainly for faster hard drives and 'some' dvd-roms (most cd/dvd are 33mb.s max) this should have a blue/grey/black connector....
(If the connection on your mobo is blue it will support udma 66/100)
Blue to mobo
black to master or single (only 1 device) drive (hard drive or DVD)
Grey to slave (only on same channel as master, poss 2nd HD or CD/DVD rom)
Can repeat on both channels
possible combo's
Primary = master hard drive * secondary = master cd-rom.
primary = master h/drive, slave = 2nd h/drive * secondary = master dvd-rom, slave cd/rom.
H/drive is always primary master.
Just to add.... if you put the ide cable in the wrong way round, it won't work, if you put the 4 pin power connector in the wrong way round it'll fry the device!, and always plug and unplug stuff with the power OFF! (even keyboard & mouse), no need to power down to plug/unplug USB devices.
 

Channel Hopper

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#5
stealthpirate said:
Just to add.... if you put the ide cable in the wrong way round, it won't work,
Is that true ?

The connector at each end looks identical.
 

stealthpirate

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#6
Channel Hopper said:
Is that true ?

The connector at each end looks identical.
Sorry, misleading... wrong way round in the same connector, some IDE cables used to come without the locating block, also the end with the red stripe is for pin 1 :)
 
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#7
I agree with stealthpirate.

The old cables had 3 black connectors, and was connected the same, so you had to jumper
the drives.

The cables for cable select has one grey connector, they look the same, but
one wire is unconnected in the grey contact, and another (i think) in the master.

The Cable must be connected as:


Controller ----------------------------------------------------------------------------- slave --------------------------master,

And, never touch anything on the motherboard unless you hold one hand on the chassi
or use a wrist strap connected to the chassi.

/birre



 
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#8
the ata133 cable described by stealth is correct,but come in two flavors,,
3 connector cables work on cable select and are coded -blue=host,
grey =slave , black= master..if your cable is grey=host, either black=drive,
you must set jumpers to master/slave
'boxnut'