Text 1774, 125 rader
Skriven 2012-02-27 12:28:38 av Pete
Ärende: Re: USB card reader
===========================
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properly
From: "Pete" <khadhargo@sbc...nospam.-.global.net>

On Fri, 24 Feb 2012 21:05:55 UTC, gw-ent@cox.net wrote:

> On Friday, February 24, 2012 10:24:11 AM UTC-8, Peter Brown wrote:
> > Hi Mr.G
> > 
> > Peter Brown wrote:
> > > Hi Mr. G
> > >
> > > Mr. G wrote:
> > >> This is new to me and I wanted to know if what I describe is
> > >> normal operations, what I may be doing wrong, or it's an
> > >> unsupported card that I'm lucky it somewhat works.
> > >> eCS 2.0...tested with a 2GB SD card. Reader works fine on that
> > >> other OS.
> > >> 1) it's a 4 slot card connected directly to the MB. USB resource
> > >> mgr. reports it as a Realtek. USB dock reports unknown device.
> > >> Removables set at 8 in config.sys. only other USB device is a mouse.
> > >
> > >
> > > So, it is an *internal* card reader.
> > >
> > >
> > >> 2) will not format JFS.
> > >
> > >
> > > Probably because JFS needs an LVM volume.
> > >
> > > HPFS yes, Fat32 probably, didn't try though.
> > >
> > > The above do not need an LVM volume.
> > >
> > >
> > >> 3) LVM will not recognize and mount SD card unless card is inserted
> > >> upon boot-up, and then only after doing a refresh removable media.
> > >> After receiving a drive letter, I can switch cards but have to do
another
> > >> refresh. No drive letter shows up in USB dock. Unmounting has to be
> > >> done from RMB menu on the drive object.
> > >
> > >
> > > I do not have to insert a card at boot to be able to use it in my
> > > internal card readers (3 systems all with the same card reader built in)
> > > here.
> > >
> > > I do have to do the Refresh when I insert a card in order to use the
> > > card and RMB to unmount (detach/eject) it.
> > >
> > > I do not have any SD cards or any large cards to test.
> > >
> > >
> > >> 4) After manually mounting drive, I tried to read a card from a camera
> > >> using Rich Walsh's Cameraderie v1.5, but it wouldn't recognize the card.
> > >>
> > >
> > >
> > > Can you access the card as a normal drive? eg if it gets mounted as M:
> > > can you simply open M: and access the files?
> > >
> > >
> > >> I've tried both IBM drivers and Lars Erdmann's latest USB drivers with
> > >> the same results. Can someone enlighten me on whats happening?
> > >
> > >
> > > Probably something to do with the card having been prepared using
> > > Windows software for use with Windows software...
> > >
> > > I suspect you may be able to use DFSee - www.dfsee.com - to blank the
> > > card, possibly the clear MBR option, and then format it as fat32
> > > presuming your camera uses fat32.
> > >
> > >
> > > I seem to recall reading somewhere that there is a new/extended fat
> > > filesystem in use on some later cards which, of course, is not an OS/2
> > > supported filesystem. Could that be the case with this card?
> > >
> > >
> > > Sorry if the above is not much help.
> > >
> > >
> > > Regards
> > >
> > > Pete
> > 
> > 
> > 
> > Is the SD card an SDXC card?
> > 
> > If "Yes" then it probably uses the exFAT filesystem; see 
> > http://en.wikipedia.org/wiki/ExFAT for some details about this filesystem.
> > 
> > 
> > Regards
> > 
> > Pete
> 
> No, 2 GB card is plain SD...4 GB card is SDHC.

My external USB reader can read 12 diffent types of cards in 4 slots, 
including 32 GB SDHC cards, provided they're formatted with HPFS, JFS, 
or FAT32 and LVM volumes have been created.

BASEDEV=USBMSD.ADD  - - - -  /REMOVABLES:14 <- this number should be the
number of different types of cards your reader can read plus 2. IOW, if 
your reader can read 6 types of cards, then removables should be 8 -- 
with mine reading 12, it's 14.

These newer cameras tend to use exFAT, particularly the ones which can 
record videos. There is no OS/2 IFS driver for exFAT, so if the camera 
uses it, the card can't be read under OS/2, period (DFSee reports these 
cards as a large floppies and unusable by OS/2). Apparently there is a 
Linux IFS driver for exFAT, so I'm hoping  .  .  . 

HTH,
Pete

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