Motorola Droid filesystem details

I was taking a look at the filesystem on my Motorola Droid and discovered they have a new YAFFS2 directory called /config.  The T-Mobile/HTC devices did not have this directory.  Interestingly, you can’t cd into the directory…you get the following error:

$ cd config
cd: can't cd to config

but you can get a little info:

$ ls /config
wifi
public
lost+found

Oddly enough, if traditional Unix permissions are respected, not even root can cd into that directory:

drw-rw-rw- root     root              1969-12-31 18:06 config

For those interested, the mounted file systems are:

rootfs / rootfs ro 0 0
tmpfs /dev tmpfs rw,mode=755 0 0
devpts /dev/pts devpts rw,mode=600 0 0
proc /proc proc rw 0 0
sysfs /sys sysfs rw 0 0
tmpfs /sqlite_stmt_journals tmpfs rw,size=4096k 0 0
none /dev/cpuctl cgroup rw,cpu 0 0
/dev/block/mtdblock4 /system yaffs2 ro 0 0
/dev/block/mtdblock6 /data yaffs2 rw,nosuid,nodev 0 0
/dev/block/mtdblock5 /cache yaffs2 rw,nosuid,nodev 0 0
/dev/block/mtdblock0 /config yaffs2 ro 0 0
/dev/block//vold/179:1 /sdcard vfat rw,dirsync,nosuid,nodev,noexec,\
uid=1000,gid=1015,fmask=0702,dmask=0702,allow_utime=0020,codepage=cp437,\
iocharset=iso8859-1,shortname=mixed,utf8,errors=remount-ro 0 0

and here is the respective info on MTD:

$ cat mtd
dev:    size   erasesize  name
mtd0: 00180000 00020000 "pds"
mtd1: 00060000 00020000 "misc"
mtd2: 00380000 00020000 "boot"
mtd3: 00480000 00020000 "recovery"
mtd4: 08c60000 00020000 "system"
mtd5: 05ca0000 00020000 "cache"
mtd6: 105c0000 00020000 "userdata"
mtd7: 00200000 00020000 "kpanic"