IDE interface question

[FinkLink]

Do any optical drives require an 80-conductor IDE ribbon cable, or are they
all still running on the old ATA/33 spec, in which case the 40-conductor
cable suffices? I didn't think that any optical drives used UATA
66/100/133, but someone at work is trying to tell me that some newer devices
do. (If that's the case, it's news to me.)

 

[Eric Gisin]

All CD-* drives and DVD-ROMs are UDMA-33, and usually work fine with 40 pin
cables. Some of the faster DVD writers use UDMA-66, and need 80 pin cables to
operate at that rate. However, even 16X DVD will work on UDMA-16.

 

[Timothy Daniels]

All CD-* drives and DVD-ROMs are UDMA-33, and usually work fine with 40 pin
cables. Some of the faster DVD writers use UDMA-66, and need 80 pin cables to
operate at that rate. However, even 16X DVD will work on UDMA-16.

A nit-pick: You mean 40-wire and 80-wire cables. Both have 40 pins
in their connectors.

*TimDaniels*

 

[Ron Reaugh]

Do any optical drives require an 80-conductor IDE ribbon cable, or are they
all still running on the old ATA/33 spec, in which case the 40-conductor
cable suffices? I didn't think that any optical drives used UATA
66/100/133, but someone at work is trying to tell me that some newer devices
do. (If that's the case, it's news to me.)

No current optical drive needs the speed past UDMA33 so 40 wire std EIDE
cables are fine.

 

[Ron Reaugh]

All CD-* drives and DVD-ROMs are UDMA-33, and usually work fine with 40 pin
cables. Some of the faster DVD writers use UDMA-66, and need 80 pin cables to
operate at that rate. However, even 16X DVD will work on UDMA-16.

There is no UDMA-16.

 

[Folkert Rienstra]

There is no UDMA-16.

Wrong, your utter stupidness, Ultra DMA mode 0 certainly exists.
Any Ultra DMA capable device has to support it.
Read the specs before you drivel.

 

[Gary L.]

All CD-* drives and DVD-ROMs are UDMA-33, and usually work fine with 40 pin
cables. Some of the faster DVD writers use UDMA-66, and need 80 pin cables to
operate at that rate. However, even 16X DVD will work on UDMA-16.

I have a Pioneer DVD-ROM drive that supports UDMA-66 and an 80
conductor cable is required to support that mode. But I doubt that it
makes much of a difference in terms of performance given the speed of
optical drives.

- -
Gary L.
Reply to the newsgroup only

 

[Eric Gisin]

There is no UDMA-16.

Read the ATA spec, clueless one. What are UDMA mode 0 and 1?

Actually 16X needs 16 x 1.2MB/s, or UDMA-25. Anyone else noticed the first
three modes are 17/25/34 MB/s (it's not 33).

 

[Ron Reaugh]

Read the ATA spec, clueless one. What are UDMA mode 0 and 1?

No one ever implemented them commercially and in drivers CRETIN.

 

[Eric Gisin]

No one ever implemented them commercially and in drivers CRETIN.

Who cares? It's in the standard. All controller chip have to support it.

Win XP's IDE driver will lower the UDMA mode when there are CRC errors.

 

[Folkert Rienstra]

And we have to take your word for that, right, ronnie rough? Rotflol

Who cares? It's in the standard. All controller chip have to support it.

And therefor all drivers have to support it.