40 pin vs 80 pin connector

March 14, 2005 at 05:42:21
Specs: Windows XP SP2, P4 3 Ghz 1 GB

Like many, I have CD-ROM problems, but mine is a little unusual. I have a 58x vanilla CD-ROM chained as a slave to a master Plextor 708-A DVD writer. Both are on the secondary IDE connector of an Asus P5GD1 board. This is the one with the RAID connector possibility on the secondary connector but the default on the Secondary connector is to IDE and I've left it that way. The two hard drives are chained master/slave to the primary and are working fine. Windows XP SP2, P4 3 Ghz, 1 GB RAM.

The CD-ROM shows up in Device Manager but freezes when I've tried to read a CD. The DVD writer works fine and will show anything when there is a disc in there. I've tried the usual workarounds, elminating the Upper and Lower Filters, removing the drives from Device Manager, zilch. In Event Manager, I keep showing Event 51 (paging error) and 11 (controller error) trying to use the CD-ROM. The Event 11 explanation says a "faulty cable" is the problem but I've changed cables twice.

What I'm thinking is that I currently have an 80-pin cable hooked up to the two optical drives and the Asus Secondary Connector which is made for an Ultra ATA 133/100/66 port and the motherboard asks for an Ultra ATA signal cable. Should that cable be a 40-pin connector rather than the 80-pin connector? Would that allow the CD-ROM to be read and will the DVD still work?

Thanks for any help here,

Neal Lavon
Takoma Park, MD

See More: 40 pin vs 80 pin connector

Report •

March 14, 2005 at 06:07:29

as far as i know (but someone might correct me)using 80 wire cable is always better then 40 wire. the 80 wire provides better shielding from interference.

Report •

March 14, 2005 at 06:17:07

There is no such thing as an 80 pin cable, they are all 40 pin. What there is though is 40 way cable and 80 way Cable. What the 80 way cable has is more ground connections to reduce interference on high speed drive.

An 80 way cable is required for ATA 66 drives and better. As your CD-ROM and DVD will be ATA 33, that will work fine with a 40 way cable, although it will work just as well with an 80 way.

The hard drives should have an 80 way connector to get maximum performance from them.

You can tell the the difference by looking at them as the 80 way will have visibly more wries in the cable. A 80 way cable has its connectors colour coded - blue, grey and black.

The blue connector must be the one connected to the motherboard.

The Gray and black connectors are slave and master respectively, but that only applies if you are using cable select.

If you are using jumper select, which you should be unless there is an overriding reason not to, the grey and black connectors can be connected to either slave or master.


Report •

March 14, 2005 at 06:27:48

Optical drives on same ide channel for some PC models just wont work.
Jams solution.

Tonite on OPTI-TV
"2011 The Year We Get Close Encounters"
Roy Scheider does so well as shark killing sherriff of Amity, he gets promoted. Now an agent of the US Gov. Roy keeps tabs on a crazy computer named Hal-9000.font>

Report •

Related Solutions

March 14, 2005 at 06:49:37

Are there any special MBoard chipset drivers available for that MB? If so, try installing them or using the update feature. Also, look a the IRQ allocations. The normal assignment is IRQ 14 & IRQ 15. Nothing else should be using these IRQs other than the IDE controllers. Should have three listings in Device manager. Primary, Secondary & Dual.

Report •

March 14, 2005 at 09:54:18

Thanks to all for the follow up. This advice is really great. Some of the best and most direct I've received. To answer all:

1)If the cable is not the issue (but I still wonder why I keep getting "faulty cable" error messages) then I am more than willing to chain them a la Oil_Tan and see what happens. They did work before this way under XP SP1 so I'll just throw that out. It may be under XP SP2, it would be better to chain via the hard drive-CD-ROM; DVD Writer-2nd HD. So we'll try that.

2) I did update the Asus BIOS to its most recent version; no change there although the BIOS was created to address a problem of as Asus put it, "Fix HDD in master may not be detected while CD-ROM connects to slave." There are updates to the RAID controller but either for 64bit XP or Server 2003. Since I wouldn't be using it for RAID, I wonder if I need to do that; I'd think not.

I'll go ahead and make the changes. By the way, in Device Manager, I have listings for two Primary IDE Controllers and two Secondary IDE controllers. Both say essentially the same thing--DMA enabled--Auto Detect. I haven't touched that at all.

I'll let you know what happens when things are rechained. Again, thanks for the advice.

Neal Lavon
Takoma Park, MD

Report •

March 14, 2005 at 09:57:47

Windows 'sometimes' has problems with two optical drives on the same cable. It's also better for data transfers to split up hard drives on different cables. Try swapping the Primary Slave hard drive and one of the optical drives.

Report •

March 14, 2005 at 11:09:12

You most likely will see an increase in data transfer from 1 drive to another. Especially video.

Except Girl Scouts

Report •

March 15, 2005 at 04:17:40

Arggh, the two optical drives in my computer are way away from the two hard drives. The 80-way cable connecting the hard drives is eighteen inches. And while it can make it to the Primary IDE connector on the motherboard with no problem, it won't make it to the CD-ROM drive at all.

I'm checking out longer cables but I seem to recall something about cables being longer than 18 inches. I can move the CD-ROM down a bit I guess and try to connect that way, but should cables longer than 18 inches be used? Any big deal there?

Neal Lavon

Report •

March 15, 2005 at 05:48:50

There is a problem with cables longer than 18 inches. The gap between the different connectors is critical as well.

18 inches overall is the maximum recommended length for an 80 way cable with a maximum of six inches between the two hard disk connectors. Any longer and you will start getting errors and data loss.


Report •

March 20, 2005 at 07:41:12

Just a followup thought. I noticed in my system that under Device Manager/ IDE/ATAPI controllers I have two listings for Primary IDE channel and two listings for Secondary IDE channel. The first listing for Secondary IDE channel (where the optical drives that are giving me tsuris are located) are set to Auto Detection and DMA if available. The second listing is set the same way. I don't know if this is normal but there it is. Win XP SP2.


Neal Lavon

Report •

Ask Question