[Samsung Galaxy Player 4.0, 5.0] saleenman95:
I have been following the thread for the 4.2 as well and at one point it was asked to run mount from adb shell and post the results. So if it will help here is what came up on my 3.6.

Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.

C:\Users\Administrator>adb shell
* daemon not running. starting it now on port 5037 *
* daemon started successfully *
$ mount
mount
rootfs / rootfs ro,relatime 0 0
tmpfs /dev tmpfs rw,relatime,mode=111 0 0
devpts /dev/pts devpts rw,relatime,mode=600 0 0
proc /proc proc rw,relatime 0 0
sysfs /sys sysfs rw,relatime 0 0
none /acct cgroup rw,relatime,cpuacct 0 0
tmpfs /mnt/asec tmpfs rw,relatime,mode=755,gid=1000 0 0
tmpfs /mnt/obb tmpfs rw,relatime,mode=755,gid=1000 0 0
none /dev/cpuctl cgroup rw,relatime,cpu 0 0
/sys/kernel/debug /sys/kernel/debug debugfs rw,relatime 0 0
/dev/block/mmcblk0p8 /system ext4 ro,relatime,barrier=1,data=ordered 0 0
/dev/block/mmcblk0p9 /data ext4 rw,nosuid,nodev,noatime,barrier=1,data=ordered,n
oauto_da_alloc,discard 0 0
/dev/block/mmcblk0p1 /efs ext4 rw,nosuid,nodev,noatime,barrier=1,data=ordered 0
0
/dev/block/mmcblk0p4 /mnt/.lfs j4fs rw,relatime 0 0
debugfs /debug debugfs rw,relatime 0 0
/dev/block/mmcblk0p7 /cache ext4 rw,nosuid,nodev,noatime,barrier=1,data=ordered
0 0
/dev/block/vold/179:10 /mnt/sdcard vfat rw,dirsync,nosuid,nodev,noexec,noatime,n
odiratime,uid=1000,gid=1015,fmask=0002,dmask=0002,allow_utime=0020,codepage=cp43
7,ioch****t=iso8859-1,shortname=mixed,utf8,errors=remount-ro,discard 0 0
/dev/block/vold/179:33 /mnt/sdcard/external_sd vfat rw,dirsync,nosuid,nodev,noex
ec,noatime,nodiratime,uid=1000,gid=1015,fmask=0002,dmask=0002,allow_utime=0020,c
odepage=cp437,ioch****t=iso8859-1,shortname=mixed,utf8,errors=remount-ro 0 0
/dev/block/vold/179:33 /mnt/secure/asec vfat rw,dirsync,nosuid,nodev,noexec,noat
ime,nodiratime,uid=1000,gid=1015,fmask=0002,dmask=0002,allow_utime=0020,codepage
=cp437,ioch****t=iso8859-1,shortname=mixed,utf8,errors=remount-ro 0 0
tmpfs /mnt/sdcard/external_sd/.android_secure tmpfs ro,relatime,size=0k,mode=000
0 0
/dev/block/dm-0 /mnt/asec/se.nena.nenamark2-1 vfat ro,dirsync,nosuid,nodev,relat
ime,uid=1000,fmask=0222,dmask=0222,codepage=cp437,ioch****t=iso8859-1,shortname=
mixed,utf8,errors=remount-ro 0 0
/dev/block/dm-1 /mnt/asec/me.laoye.free.coolcleaner-1 vfat ro,dirsync,nosuid,nod
ev,relatime,uid=1000,fmask=0222,dmask=0222,codepage=cp437,ioch****t=iso8859-1,sh
ortname=mixed,utf8,errors=remount-ro 0 0
/dev/block/dm-2 /mnt/asec/com.quoord.tapatalkxda.activity-2 vfat ro,dirsync,nosu
id,nodev,relatime,uid=1000,fmask=0222,dmask=0222,codepage=cp437,ioch****t=iso885
9-1,shortname=mixed,utf8,errors=remount-ro 0 0
/dev/block/dm-3 /mnt/asec/com.math.formulas-1 vfat ro,dirsync,nosuid,nodev,relat
ime,uid=1000,fmask=0222,dmask=0222,codepage=cp437,ioch****t=iso8859-1,shortname=
mixed,utf8,errors=remount-ro 0 0
/dev/block/dm-4 /mnt/asec/se.nena.nenamark1-1 vfat ro,dirsync,nosuid,nodev,relat
ime,uid=1000,fmask=0222,dmask=0222,codepage=cp437,ioch****t=iso8859-1,shortname=
mixed,utf8,errors=remount-ro 0 0
/dev/block/dm-5 /mnt/asec/ki.wardrive-1 vfat ro,dirsync,nosuid,nodev,relatime,ui
d=1000,fmask=0222,dmask=0222,codepage=cp437,ioch****t=iso8859-1,shortname=mixed,
utf8,errors=remount-ro 0 0
/dev/block/dm-6 /mnt/asec/com.andoop.run3d-1 vfat ro,dirsync,nosuid,nodev,relati
me,uid=1000,fmask=0222,dmask=0222,codepage=cp437,ioch****t=iso8859-1,shortname=m
ixed,utf8,errors=remount-ro 0 0
/dev/block/dm-7 /mnt/asec/com.clapfootgames.laserwarsfree-1 vfat ro,dirsync,nosu
id,nodev,relatime,uid=1000,fmask=0222,dmask=0222,codepage=cp437,ioch****t=iso885
9-1,shortname=mixed,utf8,errors=remount-ro 0 0
/dev/block/dm-8 /mnt/asec/com.mojang.minecraftpe.demo-1 vfat ro,dirsync,nosuid,n
odev,relatime,uid=1000,fmask=0222,dmask=0222,codepage=cp437,ioch****t=iso8859-1,
shortname=mixed,utf8,errors=remount-ro 0 0
$

I then ran this...

$ dd if=/dev/block/mmcblk0p8 of=/sdcard/external_sd/factoryfs_orig.img bs=4096
dd if=/dev/block/mmcblk0p8 of=/sdcard/external_sd/factoryfs_orig.img bs=4096
/dev/block/mmcblk0p8: cannot open for read: Permission denied
$

...and unfortunately had permission denied, just like the other guy on the 4.2 thread.

Ahh well...