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Old April 9th 18, 11:06 PM posted to alt.windows7.general
Paul[_32_]
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Posts: 11,873
Default little memory card slot

micky wrote:
I have a slot for a little memory card (I can't remember what they are
called) in my laptop. a Dell Latittude E4300, running win7, and the
computer doesn't seem to know it's there.

Is there some way I disabled it?

I have one in the Acer Aspire running XP, and that always knew it was
there.


( DMESG dump from http://natisbad.org/E4300/index.html )

SD Host controller: Ricoh Co Ltd R5C822 SD/SDIO/MMC/MS/MSPro Host Adapter

https://www.e-devices.ricoh.co.jp/en...cif/pcc/5c821/

"It seems that my Ricoh R5C822 SD card reader supports SDHC (class 4) as well!"

SDSC (SD): 1 MB to 2 GB, some 4 GB were made
SDHC: 2 GB to 32 GB
SDXC: 32 GB to 2 TB

That suggests 32GB might be the largest SD you could plug in.

The Ricoh site didn't leave a datasheet for me to look at,
only the package outline document ("chip scale package" or CSP).

The bug trail here in Linux for the thing, probably is a matter
of not waiting long enough on a write. A delay_write failure
on Windows might be on the order of 5 seconds or longer. You
can get delay_write failures on older Windows, if the OS runs
out of some flavor of "pool".

https://bugs.launchpad.net/ubuntu/+s...ux/+bug/247819

Anyway, keep looking for a datasheet for the R5C822 to see
whether the SD really is an SDHC controller. I think the
best I have in the house here is SDHC, don't have an SDXC yet.
And the one SDHC I bought, is a 32GB one.

It's too bad the slot just didn't say underneath "32GB"
so we'd know.

Paul


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