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@gmail.com> wrote:

quoted

From: Robert Hancock <redacted>
Subject: Re: CF Card Adapter White List Candidate
To: "Tom Denchfield" <redacted>
Cc: "Tejun Heo" <redacted>, linux-ide@vger.kernel.org
Date: Thursday, January 6, 2011, 10:22 PM
On Wed, Jan 5, 2011 at 11:33 PM, Tom
Denchfield [off-list ref]
wrote:

quoted

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.

quoted

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.

quoted

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.

quoted

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.

quoted

Robert, thank you for helping me.  I hope that my

additional comments and the information above will
contribute to further Linux kernel development.

quoted

Tom

--- On Wed, 1/5/11, Robert Hancock <hancockrwd@gmail.com>

wrote:

quoted

quoted

From: Robert Hancock <redacted>
Subject: Re: CF Card Adapter White List Candidate
To: "Tom Denchfield" <redacted>
Cc: "Tejun Heo" <redacted>,

linux-ide@vger.kernel.org

quoted

quoted

Date: Wednesday, January 5, 2011, 5:47 PM
On Wed, Jan 5, 2011 at 12:18 PM, Tom
Denchfield [off-list ref]
wrote:

quoted

Hello,

Tejun, this CF card adapter plugs directly

into an IDE

quoted

quoted

socket (Channel 0, in my case) on a desktop

computer

quoted

quoted

motherboard.  You can see a picture of the

adapter in the

quoted

quoted

following URL01:

quoted

URL01: http://preview.tinyurl.com/233u92u

I have to power the adapter with a floppy

drive power

quoted

quoted

plug because my motherboard's IDE sockets were

intentionally

quoted

quoted

manufactured without the pin that could have

supplied power

quoted

quoted

through an IDE cable.

quoted

Does anyone have a top of the head opinion as

to

quoted

quoted

whether there are inherent usage limitations in

either this

quoted

quoted

passive CF card adapter and/or in the Linux kernel

used with

quoted

quoted

Ubuntu v10.10 that would prevent users with CF

cards faster

quoted

quoted

than UDMA/66 (see URL02 below) from being

configured by

quoted

quoted

Linux to work at speeds above UDMA/66?  The

reason that I

quoted

quoted

ask this question is that I bought both my UDMA/66

CF card

quoted

quoted

and the adapter from the URL01 seller.  It is

foreseeable

quoted

quoted

that a lot of customers might have purchased

faster CF cards

quoted

quoted

envisioning that they would work at speeds higher

than

quoted

quoted

UDMA/66 with the adapter.  The 'Technical

Details' section

quoted

quoted

of URL01 does not state anything about UDMA speed

usage

quoted

quoted

limitations.

quoted

URL02: http://www.hjreggel.net/cardspeed/index.html

I think that there are CF card adapters on

eBay that

quoted

quoted

are similar to the one pictured in URL01 above,

and there

quoted

quoted

are also IDE adapters that will hold two CF

cards.

quoted

quoted

The reason the speed is being limited to 33 is

that the

quoted

quoted

cable
detection code is detecting that an 80-wire cable

doesn't

quoted

quoted

appear to be
connected. In order for an 80-wire cable to be

detected,

quoted

quoted

pin 34 on the
cable is supposed to be grounded at the

motherboard end. In

quoted

quoted

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

quoted

quoted

detection, but
presumably it's not.

quoted

Tom

--- On Wed, 1/5/11, Tejun Heo <htejun@gmail.com>

wrote:

quoted

quoted

From: Tejun Heo <redacted>
Subject: Re: CF Card Adapter White List

Candidate

quoted

quoted

quoted

quoted

To: "Robert Hancock" <redacted>
Cc: "Tom Denchfield" <redacted>,

linux-ide@vger.kernel.org

quoted

quoted

Date: Wednesday, January 5, 2011, 5:51

AM

quoted

quoted

quoted

quoted

Hello,

On Tue, Jan 04, 2011 at 10:19:17PM -0600,

Robert

quoted

quoted

Hancock

quoted

quoted

wrote:

quoted

On 01/04/2011 04:18 PM, Tom

Denchfield

quoted

quoted

wrote:

quoted

quoted

quoted

quoted

As you further recommended, in

an attempt

quoted

quoted

to get

quoted

quoted

the SD-CF-IDE-DI

quoted

quoted

IDE to CF Adapter that holds my

CF card

quoted

quoted

white

quoted

quoted

listed, I am

quoted

quoted

submitting the attached

libata_force_80c_CF_card_adapter_whitelist_candidate_information.txt

quoted

quoted

quoted

quoted

quoted

quoted

file that has the output from

executing

quoted

quoted

four

quoted

quoted

terminal commands to

quoted

quoted

hopefully supply enough

information to

quoted

quoted

get it

quoted

quoted

whitelisted.

Thanks.

quoted

quoted

Although I expect that my RV280

Radeon

quoted

quoted

9200 Pro

quoted

quoted

video card is too

quoted

quoted

old to expend much effort on, it

would be

quoted

quoted

nice to

quoted

quoted

also get it

quoted

quoted

whitelisted so that future

newbie Linux

quoted

quoted

users who

quoted

quoted

do not know about

quoted

quoted

using the radeon.modeset=0

parameter on

quoted

quoted

the kernel

quoted

quoted

command line

quoted

quoted

will not be looking at a black

screen

quoted

quoted

with a

quoted

quoted

blinking cursor when

quoted

quoted

they attempt to use a LiveCD

for

quoted

quoted

troubleshooting,

quoted

quoted

or whatever.

quoted

quoted

I purposely did not include the

URL of

quoted

quoted

one of the

quoted

quoted

Internet sites

quoted

quoted

that sells the adapter in this

email in

quoted

quoted

case this

quoted

quoted

is a no no.

I don't think that's a no no unless the

intention

quoted

quoted

is

quoted

quoted

commercial.

quoted

quoted

Tejun, I am not sure that I will

have

quoted

quoted

either the

quoted

quoted

time or the

quoted

quoted

interest to learn the

intricacies of

quoted

quoted

editing

quoted

quoted

quoted

quoted

http://www.thinkwiki.org/wiki/Compact_Flash_boot_drive

to add

quoted

quoted

libata.force=80c to this site in

lieu of

quoted

quoted

quoted

quoted

force_cbl=80: so that

quoted

quoted

fewer people will be asking you

questions.  I

quoted

quoted

have a ThinkPad

quoted

quoted

without a HDD plus a laptop

adapter that

quoted

quoted

will hold

quoted

quoted

my CF card, but

quoted

quoted

my Think Pad is a lot older than

the

quoted

quoted

ones

quoted

quoted

discussed on

quoted

quoted

Compact_Flash_boot_drive.  In

addition,

quoted

quoted

I did

quoted

quoted

not see any recent

quoted

quoted

updates to this Internet page,

but maybe

quoted

quoted

I can

quoted

quoted

find someone to

quoted

quoted

email who will update this

page.

quoted

quoted

quoted

quoted

Yeah, just ping someone.

quoted

Is there actually any way to

identify the

quoted

quoted

adapter

quoted

quoted

automatically?

quoted

AFAIK, these CF-IDE adapters are

just

quoted

quoted

passive

quoted

quoted

circuitry and there's

quoted

no way to identify them through

software.

quoted

quoted

quoted

quoted

Hmmm... I was thinking this was somehing

integrated to the

quoted

quoted

machine (so
the dmidecode), in which case we can

combine dmi +

quoted

quoted

pci

quoted

quoted

function # +
port # to whitelist the device, which we

already

quoted

quoted

do for

quoted

quoted

some type of
quirks.  If it's a plug in device, we

obviously

quoted

quoted

can't

quoted

quoted

identify it.
Tom, is the CF slot integrated to the

machine or

quoted

quoted

is it

quoted

quoted

something you
put into the PCMCIA slot?

Thanks.

--
tejun