On Sat, 8 Oct 2011 07:09:24 -0700 (PDT)
Rich Shepard <[email protected]> dijo:

>On Fri, 7 Oct 2011, John Jason Jordan wrote:
>
>> Maybe I broke the card while ejecting and reinserting?

>I doubt it. Do you have a bunch of /dev/mmc... whatevers? I'm
>completely unfamiliar with what sort of device that might be, but the
>USB flash drives are usually seen by the kernel as equivalent of SCSI
>drives, hence an assignment to /dev/sb... (for SCSI block device).

OK, after a night's sleep and my morning coffee it occurred to me that
my computer has several GUI disk utilities that might help.

I started with Palimpsest, which has the handy ability to read
information from Smart drives. Palimpsest once diagnosed a failing hard
drive on another computer, and saved me potential headaches.

When I launched Palimpsest at first it did not see the SD card. But
after I popped the card out and reinserted it Palimpsest automatically
added it to the list of devices. And Nautilus automatically opened a
file browser window. I noted in the Nautilus window that reformatting
it on my phone had added LOST.DIR and Android-secure folders.

Palimpsest reported the following potentially useful information:

DRIVE:
Model:                  SU32G
Firmware version:       12/2010
Capacity:                       32 GB
Partitioning:           Master boot record
Serial number:          0c38530e
Device:                 /dev/mmcblk0
Rotation rate:          Solid state disk
Connection:             SDIO
Smart status            Not supported

In the DRIVE section Palimpsest offers buttons for Format Drive, and
for Benchmark.

VOLUMES:
Usage:                  Filesystem
Partition type          W95 FAT32 (LBA) (0x0c)
Partition flags         Bootable
Type:                   FAT (32 bit version)
Device:                 /dev/mmcblk0p1
Partition label:                -
Capacity:                       32 GB
Available:                      -
Mount point:            Mounted at /media/2535-1DF9

In the VOLUME section Palimpsest offers buttons for Unmount Volume,
Check Filesystem, Delete Partition, Format Volume, and Edit Partition.

The only button I tried was Edit Partition, which popped up a little
window with Partition Label (grayed out), Type (drop-down, currently at
"W95 FAT32 (LBA) (0x0c), and offering many other filesystem types),
plus a check box for "Bootable," which is checked. I exited the window
without changing anything.

My original line in fstab was:

/dev/mmcblk0 /media/SD vfat noauto,users,rw 0 0

But that always generated error messages that /dev/mmcblk0 did not
exist. So, armed with the information from Palimpsest I changed it to:

/dev/mmcblk0p1 /media/SD vfat noauto,users,rw 0 0

However, that generates error messages that /dev/mmcblk0p1 does not
exist. 

I'm still not there, but I feel I am getting closer. Some questions:

Do I need this thing to be bootable? I will use it just for additional
storage. Would removing the Bootable flag do anything to resolve the
problem? (Probably not.)

The partition type is W95 VFAT (LBA) (0x0c). What do "LBA" and "0x0c"
mean? Is the "vfat" in my fstab line the correct way to tell fstab what
filesystem it is? I might want to use the card to transfer files to
other people's computers, so VFAT is probably the best choice, but
there are other VFAT options in the Palimpsest drop-down. Should I
reformat it to a different filesystem? 

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