ROM and HD on same IDE?

kithen · Jun 17, 2007

A simple question really, can I set a Hard Drive as my master on a IDE chain and set the CD-ROM to the slave? My motherboard only has 1 IDE slot. The motherboard is an ASUS M2R32-MVP, and the processor is an AMD 3800+. THanks in advance for any info.

Jess Stingray · Jun 17, 2007

Yes, you can, I did it on my third computer I ever had.

kithen · Jun 17, 2007

Well, I hooked the Harddrive up to the master and the CD-ROM as the slave and the bios is not detecting the primary drive.

freaksavior · Jun 17, 2007

as Ben Clarke said, you can. but it will slow it down, so if you can avoid it, use a separate channel for each device!

Alcpone · Jun 17, 2007

Double check your jumpers, is it a ide 80 cable?

Darknova · Jun 17, 2007

It will only slow it down if you connect the CD-ROM as Master. The speed is set by the Master of the IDE channel. I had a harddrive and a DVD-ROM connected on the same IDE channel and it ran at full speed as long as the harddrive was set as master.

kithen · Jun 17, 2007

how do i check if it is an ide 80 cable?

Dippyskoodlez · Jun 17, 2007

kithen said:
how do i check if it is an ide 80 cable?

Count.

Its also a much finer cable (because theres 80 in the same place)

Once you see the difference for the first time you should be able to tell them apart really easily.

Deleted member 3 · Jun 17, 2007

kithen said:
how do i check if it is an ide 80 cable?

Count the wires

There are either 40 or 80. If you see both cables you can identify the cables in seconds the next time, the difference is quite notable. (80 pin cable has thinner wires)

You might need to set the drive as master with slave present instead of single.

DHC120 · Jul 3, 2007

iNquiring Newbie Needs to kNow

Thought I was losing what's left of my mind :confused:

.
I have 39 Pin/80 wire gray cables and 39 pin/40 wire gray cables..
What is the difference? (Yeah, I know--forty wires-- now that the wise-azzed comment is out of the way :laugh:

)
Also, I have 40 pin/40 wire gray cables..
Could someone 'splain the uses and differences in these three types of cables? :banghead:

I sure would appreciate it. :respect:

Thanks.
Chas.
PS I've been told that the "long end" of the cable MUST attach to the IDE slot on the MoBo with the middle connector attached to the "slave" (CD) and the end connector attached to a "Master" (HDD).. Problem.. IDE0 on MoBo is two inches away from HDD, CD is eighteen inches away at the top of the case... the only way the cable can connect is to have the "long end" plugged into the CD, the middle plug (which is closer to the "Master" plug) to the HDD and "short end" (aka CD Master end) plugged into the IDE0 slot.. Do the electrons really care which direction the cable is facing??

Darknova · Jul 3, 2007

The long end MUST be connected to the Motherboard, however where the others are place doesn't matter as long as you set them both as Cable Select, however which ever is on the end connector will set the speed of the entire channel, so you really want the HDD on the end, and the Optical on the Middle.

Oh, and the difference is that the 80 wire cable can obtain faster speeds because the extra wires are used as insulation from the other 40. The older 40 wires ones can't get to as high speeds as the 80s because you get interference between the wires and you end up with corrupted data.

DHC120 · Jul 3, 2007

Darknova said:
The long end MUST be connected to the Motherboard, however where the others are place doesn't matter as long as you set them both as Cable Select, however which ever is on the end connector will set the speed of the entire channel, so you really want the HDD on the end, and the Optical on the Middle.

Oh, and the difference is that the 80 wire cable can obtain faster speeds because the extra wires are used as insulation from the other 40. The older 40 wires ones can't get to as high speeds as the 80s because you get interference between the wires and you end up with corrupted data.

DarkNova;
I appreciate the reply.. Thanks.
What is the actual reasoning (logic?) behind the "long end MUST be connected..." to the board?
Also, "Cable Select" is Greek to me.. I do understand that both HDD & CD need to be set (jumpered) to "CS", but that is the total sum of my very limited knowledge.. anything special required in the BIOS set-up?, etc.?
I like faster and uncorrupted data.. so, 80 wire cables it is..
Chas.

Wile E · Jul 3, 2007

When using Cable Select, the position on the cable determines Master and Slave. The one on the very end is the Master drive, the one in the middle is the Slave. Set your drives to CS, put the Hard Drive on the end of the cable, and the Rom in the middle.

As for the reasoning behind the long end being on the board, I have no idea. lol. I'd kinda like to know as well.

Easy Rhino · Jul 3, 2007

Wile E said:
When using Cable Select, the position on the cable determines Master and Slave. The one on the very end is the Master drive, the one in the middle is the Slave. Set your drives to CS, put the Hard Drive on the end of the cable, and the Rom in the middle.

As for the reasoning behind the long end being on the board, I have no idea. lol. I'd kinda like to know as well.

that always bugged me because if you think about the setup, the IDE connector on the mobo is almost always toward the bottom. so the first connector should be master and the one on the very end should be slave, considering the HDD is on the bottom and the CDROM is on the top.

Wile E · Jul 3, 2007

Easy Rhino said:
that always bugged me because if you think about the setup, the IDE connector on the mobo is almost always toward the bottom. so the first connector should be master and the one on the very end should be slave, considering the HDD is on the bottom and the CDROM is on the top.

Yeah, I never found it to be a particularly wise design either.

Has anyone here tried running an IDE cable backwards? I wonder if it would work. I never tried it, myself.

ex_reven · Jul 3, 2007

Wile E said:
Yeah, I never found it to be a particularly wise design either.

Has anyone here tried running an IDE cable backwards? I wonder if it would work. I never tried it, myself.

Yeah of course it works...
it just doesnt allow you to attach that second drive because the cable wont reach

Cuzza · Jul 3, 2007

So how does it know which drive is on which plug when using cable select?

Easy Rhino · Jul 3, 2007

Wile E said:
Yeah, I never found it to be a particularly wise design either.

Has anyone here tried running an IDE cable backwards? I wonder if it would work. I never tried it, myself.

yea, but it is essentially renders part of the cable useless.

DrunkenMafia · Jul 3, 2007

Just beware too, if you have one set to master and one to slave you have to connect em up the correct way or it won't pick up both drives.

You are much better off setting both drives to CS and putting the HDD on the end of the cable, cd rom in middle and long end on MB...

Darknova · Jul 3, 2007

I have tried running an IDE cable backwards, it doesn't work properly. I've done it in a number of PCs and they wont pick up what's on the middle slot.

And if you want to know why, it's because the end and the middle only have half the wires going to it. Where as the long end has ALL the wires going to it. So you lose functionality on the middle slot if you run the cable the other way around because there are no wires running to the end slot. Think of it like the wires split off to go to each plug and you actually have 2 seperate cables.

Also, Cable Select is CS.

DHC120 · Jul 5, 2007

Well, I'm glad to see I'm not the only one confused by this stuff..

DarkNova;
In my recent and on-going searches, I read that on 80 wire IDE cables, every "odd" wire is a ground on some and every "even" wire is a ground on others.. The idea behind these ground wires is to eliminate "noise" to/from the drives, but there seems to be no "standard" on how these cables are wired and this little fact sounds like it could result in folks having HDD and Board "problems", especially a builder installing a used hard-drive who may not have the "factory issued" compatable cable.. I wonder what damaged that might cause builders?
How many of us have built a "bitsa computer"? You know.. bits of this and bits of that.. just whatever we had or could scrounge.. How many of those "Bitsa's" worked perfectly on first power-up?
Chas

Deleted member 3 · Jul 5, 2007

Modern cables have 1 wire disconnected in the middle and connected to another on the far end to make cable select work. This is why turning the cable around won't work flawlessly. Older cables don't have this.

Darknova · Jul 5, 2007

DHC120 said:
How many of us have built a "bitsa computer"? You know.. bits of this and bits of that.. just whatever we had or could scrounge.. How many of those "Bitsa's" worked perfectly on first power-up?

My very first PC was a "bitsa" PC, my server running 2k3 is a "bitsa" server. All ran perfectly on first boot. All use IDE, no problems what so ever.
We have sheds full of computer bits from PCs dating back decades. I could actually build about 3 socket A PCs right now if I wanted lol. We also have an old 386 somewhere. All would work with no problems. I've even raided the old PCs that my old school threw out for parts.

HookeyStreet · Jul 5, 2007

kithen said:
A simple question really, can I set a Hard Drive as my master on a IDE chain and set the CD-ROM to the slave? My motherboard only has 1 IDE slot. The motherboard is an ASUS M2R32-MVP, and the processor is an AMD 3800+. THanks in advance for any info.

It can be done, but its not advisable

Processor	AMD Athlon 64 X2 3800+
Motherboard	ASUS M2R32-MVP
Cooling	Stock
Memory	2 Gb Corsair XMS2 DDR2 800 PC2 6400
Video Card(s)	2x ATI Radeon X1650PRO, 512 MB Ram, PCIe
Storage	40 GB Seagate IDE
Display(s)	Microtek c593 15 in. Monitor
Case	Cooler Master Lite 330
Power Supply	500 W
Software	Windows XP SP 2

Processor	Intel Core i7-7700K
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Cooling	Arctic Cooling Freezer i11
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Software	Windows 10 x64 Pro

Processor	AMD Athlon 64 X2 3800+
Motherboard	ASUS M2R32-MVP
Cooling	Stock
Memory	2 Gb Corsair XMS2 DDR2 800 PC2 6400
Video Card(s)	2x ATI Radeon X1650PRO, 512 MB Ram, PCIe
Storage	40 GB Seagate IDE
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Case	Cooler Master Lite 330
Power Supply	500 W
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ROM and HD on same IDE?

kithen

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Jess Stingray

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freaksavior

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