$ head  /sys/block/mmcblk0/device/*
==> /sys/block/mmcblk0/device/block <==
head: error reading `/sys/block/mmcblk0/device/block': Is a directory

==> /sys/block/mmcblk0/device/cid <==
1b534d303030303010726cbc6400bc00

==> /sys/block/mmcblk0/device/csd <==
400e00325b590000e9e57f800a404000

==> /sys/block/mmcblk0/device/date <==
12/2011

==> /sys/block/mmcblk0/device/driver <==
head: error reading `/sys/block/mmcblk0/device/driver': Is a directory

==> /sys/block/mmcblk0/device/erase_size <==
512

==> /sys/block/mmcblk0/device/fwrev <==
0x0

==> /sys/block/mmcblk0/device/hwrev <==
0x1

==> /sys/block/mmcblk0/device/manfid <==
0x00001b

==> /sys/block/mmcblk0/device/name <==
00000

==> /sys/block/mmcblk0/device/oemid <==
0x534d

==> /sys/block/mmcblk0/device/power <==
head: error reading `/sys/block/mmcblk0/device/power': Is a directory

==> /sys/block/mmcblk0/device/preferred_erase_size <==
4194304

==> /sys/block/mmcblk0/device/scr <==
02b5800200000000

==> /sys/block/mmcblk0/device/serial <==
0x726cbc64

==> /sys/block/mmcblk0/device/subsystem <==
head: error reading `/sys/block/mmcblk0/device/subsystem': Is a directory

==> /sys/block/mmcblk0/device/type <==
SD

==> /sys/block/mmcblk0/device/uevent <==
DRIVER=mmcblk
MMC_TYPE=SD
MMC_NAME=00000
MODALIAS=mmc:block