Robert, yes, the IDE socket missing pin was # 20, the Key needed for 80-conductor IDE cables, as you stated below. I had to take the adapter out so I carefully looked at it and compared it to a photograph on a pin-out Internet site. I also looked at an enlarged photo of the laptop CF card adapter pictured in URL03, and counted 44 pins - at least counting from the bottom of the socket. I notice that the dmesg output in my Wednesday, January 5, 2011 11:33 PM email to you guys has been removed from you response below. I realize that you need to keep emails shorter than those that I write, but I think that the dmesg demonstrates that my particular CF card adapter is indeed capable of being forced (libata.force=80c) to UDMA/66 even though it is not (economically) feasible to insert a 80-wire IDE cable between the CF card adapter and the IDE socket on a desktop computer's motherboard. Robert, again thank you for helping me, and I hope that I may have contributed at least a little bit of useful information. Tom --- On Thu, 1/6/11, Robert Hancock <hancockrwd@xxxxxxxxx> wrote: > From: Robert Hancock <hancockrwd@xxxxxxxxx> > Subject: Re: CF Card Adapter White List Candidate > To: "Tom Denchfield" <td_denchfield@xxxxxxxxx> > Cc: "Tejun Heo" <htejun@xxxxxxxxx>, linux-ide@xxxxxxxxxxxxxxx > Date: Thursday, January 6, 2011, 10:22 PM > On Wed, Jan 5, 2011 at 11:33 PM, Tom > Denchfield <td_denchfield@xxxxxxxxx> > wrote: > > The reason that I mentioned powering my CF adapter > with a floppy drive power plug is that the first time I > booted after inserting the adapter, I forgot to plug the > floppy drive power plug into the adapter. The adapter's > power on LED did not light, and I think that Ubuntu did not > see the CF card. > > > > The reason that I mentioned the pin that was > intentionally left out of the motherboard IDE socket was > that I thought that the missing pin might have had something > to do with needing to power the adapter with the floppy > drive power plug given my experience with forgetting to plug > the floppy power plug into the adapter as mentioned in the > previous paragraph. > > > > The pin that is missing from the motherboard IDE > socket is very close to the middle of the IDE socket. My > guess is that the pin is in the in the range #18 to #24. > It is far away from pin #34. I am going by memory here, > but I clearly remember that the missing pin is in the > middle. Pin #34 is going into the CF card adapter when I > insert it. I do not know whether pin #34 is grounded at > the mainboard. > > If it's pin 20, that's a key pin that's always missing and > which has > the corresponding hole filled in on the cable side (from > compliant > connectors, anyway), to prevent plugging in the cable the > wrong way > around. > > Not sure where the adapter would be potentially drawing > power from on > the IDE connector - as far as I know there aren't any pins > on a > standard IDE connector which provide continuous power. The > adapters > I've seen all use an extra power connector. > > > > > When I asked my question, before I noticed and paid > any real attention to the UDMA/100 CF card configured as > UDMA/100 in URL03 above, I was concerned that there might be > a UDMA/66 speed limit with the type of CF card adapter that > I have. We may never know for sure until someone who has a > CF card that is faster than UDMA/66 tries it in the URL01 > adapter with Linux and the libata.force=80c boot parameter. > > > > Robert, thank you for helping me. I hope that my > additional comments and the information above will > contribute to further Linux kernel development. > > > > Tom > > > > --- On Wed, 1/5/11, Robert Hancock <hancockrwd@xxxxxxxxx> > wrote: > > > >> From: Robert Hancock <hancockrwd@xxxxxxxxx> > >> Subject: Re: CF Card Adapter White List Candidate > >> To: "Tom Denchfield" <td_denchfield@xxxxxxxxx> > >> Cc: "Tejun Heo" <htejun@xxxxxxxxx>, > linux-ide@xxxxxxxxxxxxxxx > >> Date: Wednesday, January 5, 2011, 5:47 PM > >> On Wed, Jan 5, 2011 at 12:18 PM, Tom > >> Denchfield <td_denchfield@xxxxxxxxx> > >> wrote: > >> > Hello, > >> > > >> > Tejun, this CF card adapter plugs directly > into an IDE > >> socket (Channel 0, in my case) on a desktop > computer > >> motherboard. You can see a picture of the > adapter in the > >> following URL01: > >> > > >> > URL01: http://preview.tinyurl.com/233u92u > >> > > >> > I have to power the adapter with a floppy > drive power > >> plug because my motherboard's IDE sockets were > intentionally > >> manufactured without the pin that could have > supplied power > >> through an IDE cable. > >> > > >> > Does anyone have a top of the head opinion as > to > >> whether there are inherent usage limitations in > either this > >> passive CF card adapter and/or in the Linux kernel > used with > >> Ubuntu v10.10 that would prevent users with CF > cards faster > >> than UDMA/66 (see URL02 below) from being > configured by > >> Linux to work at speeds above UDMA/66? The > reason that I > >> ask this question is that I bought both my UDMA/66 > CF card > >> and the adapter from the URL01 seller. It is > foreseeable > >> that a lot of customers might have purchased > faster CF cards > >> envisioning that they would work at speeds higher > than > >> UDMA/66 with the adapter. The 'Technical > Details' section > >> of URL01 does not state anything about UDMA speed > usage > >> limitations. > >> > > >> > URL02: http://www.hjreggel.net/cardspeed/index.html > >> > > >> > I think that there are CF card adapters on > eBay that > >> are similar to the one pictured in URL01 above, > and there > >> are also IDE adapters that will hold two CF > cards. > >> > >> The reason the speed is being limited to 33 is > that the > >> cable > >> detection code is detecting that an 80-wire cable > doesn't > >> appear to be > >> connected. In order for an 80-wire cable to be > detected, > >> pin 34 on the > >> cable is supposed to be grounded at the > motherboard end. In > >> the case > >> of this adapter, since it plugs directly into the > >> motherboard, it > >> would have to be grounding pin 34 to get an > 80-wire > >> detection, but > >> presumably it's not. > >> > >> > > >> > Tom > >> > > >> > --- On Wed, 1/5/11, Tejun Heo <htejun@xxxxxxxxx> > >> wrote: > >> > > >> >> From: Tejun Heo <htejun@xxxxxxxxx> > >> >> Subject: Re: CF Card Adapter White List > Candidate > >> >> To: "Robert Hancock" <hancockrwd@xxxxxxxxx> > >> >> Cc: "Tom Denchfield" <td_denchfield@xxxxxxxxx>, > >> linux-ide@xxxxxxxxxxxxxxx > >> >> Date: Wednesday, January 5, 2011, 5:51 > AM > >> >> Hello, > >> >> > >> >> On Tue, Jan 04, 2011 at 10:19:17PM -0600, > Robert > >> Hancock > >> >> wrote: > >> >> > On 01/04/2011 04:18 PM, Tom > Denchfield > >> wrote: > >> >> >> As you further recommended, in > an attempt > >> to get > >> >> the SD-CF-IDE-DI > >> >> >> IDE to CF Adapter that holds my > CF card > >> white > >> >> listed, I am > >> >> >> submitting the attached > >> >> >> > >> >> > >> > libata_force_80c_CF_card_adapter_whitelist_candidate_information.txt > >> >> >> file that has the output from > executing > >> four > >> >> terminal commands to > >> >> >> hopefully supply enough > information to > >> get it > >> >> whitelisted. > >> >> > >> >> Thanks. > >> >> > >> >> >> Although I expect that my RV280 > Radeon > >> 9200 Pro > >> >> video card is too > >> >> >> old to expend much effort on, it > would be > >> nice to > >> >> also get it > >> >> >> whitelisted so that future > newbie Linux > >> users who > >> >> do not know about > >> >> >> using the radeon.modeset=0 > parameter on > >> the kernel > >> >> command line > >> >> >> will not be looking at a black > screen > >> with a > >> >> blinking cursor when > >> >> >> they attempt to use a LiveCD > for > >> troubleshooting, > >> >> or whatever. > >> >> >> > >> >> >> I purposely did not include the > URL of > >> one of the > >> >> Internet sites > >> >> >> that sells the adapter in this > email in > >> case this > >> >> is a no no. > >> >> > >> >> I don't think that's a no no unless the > intention > >> is > >> >> commercial. > >> >> > >> >> >> Tejun, I am not sure that I will > have > >> either the > >> >> time or the > >> >> >> interest to learn the > intricacies of > >> editing > >> >> >> http://www.thinkwiki.org/wiki/Compact_Flash_boot_drive > >> >> to add > >> >> >> libata.force=80c to this site in > lieu of > >> >> force_cbl=80: so that > >> >> >> fewer people will be asking you > >> questions. I > >> >> have a ThinkPad > >> >> >> without a HDD plus a laptop > adapter that > >> will hold > >> >> my CF card, but > >> >> >> my Think Pad is a lot older than > the > >> ones > >> >> discussed on > >> >> >> Compact_Flash_boot_drive. In > addition, > >> I did > >> >> not see any recent > >> >> >> updates to this Internet page, > but maybe > >> I can > >> >> find someone to > >> >> >> email who will update this > page. > >> >> > >> >> Yeah, just ping someone. > >> >> > >> >> > Is there actually any way to > identify the > >> adapter > >> >> automatically? > >> >> > AFAIK, these CF-IDE adapters are > just > >> passive > >> >> circuitry and there's > >> >> > no way to identify them through > software. > >> >> > >> >> Hmmm... I was thinking this was somehing > >> integrated to the > >> >> machine (so > >> >> the dmidecode), in which case we can > combine dmi + > >> pci > >> >> function # + > >> >> port # to whitelist the device, which we > already > >> do for > >> >> some type of > >> >> quirks. If it's a plug in device, we > obviously > >> can't > >> >> identify it. > >> >> Tom, is the CF slot integrated to the > machine or > >> is it > >> >> something you > >> >> put into the PCMCIA slot? > >> >> > >> >> Thanks. > >> >> > >> >> -- > >> >> tejun > >> >> > >> > > >> > > >> > > >> > > >> > > > > > > > > > > > > > > > > > > > > > > > -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
