Re: HC SD card queries

Jürgen Exner <jurgenex@xxxxxxxxxxx> wrote:

Terry Pinnell <terrypinDELETE@xxxxxxxxxxxxxxxxxxx> wrote:
I have a 4 GB 'SDHC' SD card which I bought impulsively (cheap, high
capacity) some months ago. I could not get it to work in the Belkin
Card Reader on my old XP SP1 PC, which I assumed was because that PC
didn't have USB 2.0.So I bought a little USB adapter and that allowed
me to read and write to it, albeit very slowly.

That surprises me very much. USB2 is backward compatible with USB1, i.e.
any USB2 device should(!) fully implement and use USB1 protocols the
othner device does not support USB2.

Not sure I follow you. The old PC was limited to USB 1.0. The adapter
was capable of USB 2.0 but obviously couldn't use it. So it was slow.
The (old) Belkin Reader, which had been reading SD and CF cards for
years (albeit at USB 1.0 speeds) wouldn't read the SDHC.

I would have suspected that the card reader was SD 1.x only and didn't
support SDHC. That would have been a very well known backward
compatibily issue SD.

That sounds right.

I've finally upgraded my PC (to a MESH Xtreme GTS, Quad Core, 2.66
GHz)

Well, those specs don't tell anything about the version of the buildin
SD card reader.

Unfortunately I don't know the spec of the reader. The MESH
description is "Multi-format card reader". My point was simply that
this was a high end PC. I assumed all its components would be up there
with the current best.

and expected to have no issues with reading this SD card with its
built-in multi-card reader. But to my surprise that doesn't work
either. Get either nothing (just hangs) or a message about I/O error.

Could be a million of different things.

So I still have to go via the USB adapter. And even that still seems
excruciatingly slow.

If your USB adapter or the card reader connected to it supports USB1
only, then it doesn't matter how fast or modern your computer is.

The USB adapter is a USB 2.0 type.

I have only the one HC card and so cannot make any comparative tests.
Is this a common problem please?

Depends which problem you are talking about:
- backward compatibility issues between SD1.x and SDHC: yes, by poor
design

The problem I described! Namely the inability of my modern, high-speed
PC's SD reader to read an SDHC card. From Matt's reply, looks like it
is indeed a common problem. Surprises me nevertheless, that a modern
reader (PC built 2 months ago) should not support this type.

- slow transfer over USB1: yes, by design

See above; not the issue here.

- backward compatibilty issues between USB1 and USB2: no
- card readers in a new computer not compatible with SDHC: no

See above; not the issue here.

jue
.

Relevant Pages

  • Re: Suggestions for card reader of Optiplex 360
    ... an internal usb header to use to connect your internal card reader. ... I woudl suggest is that you purchase an inexpensive usb expansion card to ... type connector inbternally, some have a regular usb port internally. ...
    (alt.sys.pc-clone.dell)
  • Re: Suggestions for card reader of Optiplex 360 - solved
    ... No drivers needed for the USB card at all. ... I did install the card reader drivers on Dell site lisrted for a card ... an internal usb header to use to connect your internal card reader. ... pin type connector inbternally, some have a regular usb port internally. ...
    (alt.sys.pc-clone.dell)
  • Re: Suggestions for card reader of Optiplex 360
    ... internal usb header to use to connect your internal card reader. ... connector inbternally, some have a regular usb port internally. ...
    (alt.sys.pc-clone.dell)
  • Re: USB 2.0 Storage Slow when Inserted, Fast after Reboot. Huh?
    ... Disconnect the card reader first. ... My various USB thumbdrives, ipod with USB connection, and external USB ... The SanDisk and Crucial products have NO drivers for Windows XP, ... Tested the cardreaders in other Intel-based computers with SP2. ...
    (microsoft.public.windowsxp.hardware)
  • Re: media card reader access disappears
    ... It does not find the USB connected card reader when you search for new hardware with or without a card in the card reader. ... They provide an option to defeat power saving feature. ... Of the five "USB Root Hub", ...
    (microsoft.public.windowsxp.general)