[XDA-University] sidneyk:
OK, here is from my SGH-T769 under Android:

sidney@sid-max-ubuntu:~$ adb shell cat /proc/mounts
rootfs / rootfs ro,relatime 0 0
tmpfs /dev tmpfs rw,nosuid,relatime,mode=755 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
/dev/block/mmcblk0p24 /system ext4 ro,relatime,user_xattr,acl,barrier=0,data=ordered 0 0
/dev/block/mmcblk0p26 /cache ext4 rw,nosuid,nodev,relatime,user_xattr,acl,barrier=1,data=ordered 0 0
/dev/block/mmcblk0p21 /efs ext4 rw,nosuid,nodev,relatime,user_xattr,acl,barrier=1,data=ordered 0 0
/dev/block/mmcblk0p25 /data ext4 rw,nosuid,nodev,noatime,user_xattr,acl,barrier=1,data=ordered,noauto_da_alloc 0 0
/dev/block/mmcblk0p13 /system/etc/firmware/misc vfat ro,relatime,fmask=0133,dmask=0022,codepage=cp437,iocharset=iso8859-1,shortname=lower,errors=remount-ro 0 0
/dev/block/mmcblk0p17 /system/etc/firmware/misc_mdm vfat ro,relatime,fmask=0133,dmask=0022,codepage=cp437,iocharset=iso8859-1,shortname=lower,errors=remount-ro 0 0
/dev/block/mmcblk0p27 /tombstones ext4 rw,nosuid,nodev,relatime,user_xattr,acl,barrier=1,data=ordered 0 0
/sys/kernel/debug /sys/kernel/debug debugfs rw,relatime 0 0
/dev/block/dm-0 /mnt/asec/com.keramidas.TitaniumBackupPro-1 ext4 ro,dirsync,nosuid,nodev,noatime,user_xattr,acl,barrier=1 0 0
/dev/block/vold/179:33 /storage/sdcard1 vfat rw,dirsync,nosuid,nodev,noexec,relatime,uid=1000,gid=1015,fmask=0702,dmask=0702,allow_utime=0020,codepage=cp437,iocharset=iso8859-1,shortname=mixed,utf8,errors=remount-ro 0 0
/dev/block/vold/179:28 /storage/sdcard0 vfat rw,dirsync,nosuid,nodev,noexec,relatime,uid=1000,gid=1015,fmask=0702,dmask=0702,allow_utime=0020,codepage=cp437,iocharset=iso8859-1,shortname=mixed,utf8,errors=remount-ro 0 0
/dev/block/vold/179:28 /mnt/secure/asec vfat rw,dirsync,nosuid,nodev,noexec,relatime,uid=1000,gid=1015,fmask=0702,dmask=0702,allow_utime=0020,codepage=cp437,iocharset=iso8859-1,shortname=mixed,utf8,errors=remount-ro 0 0
tmpfs /storage/sdcard0/.android_secure tmpfs ro,relatime,size=0k,mode=000 0 0
/dev/block/dm-1 /mnt/asec/com.gsn.android.casino-1 ext4 ro,dirsync,nosuid,nodev,noatime,user_xattr,acl,barrier=1 0 0
/dev/block/dm-2 /mnt/asec/com.phantomefx.standalone.mermaidspearl-1 ext4 ro,dirsync,nosuid,nodev,noatime,user_xattr,acl,barrier=1 0 0
/dev/block/dm-3 /mnt/asec/com.phantomefx.standalone.robinhood-1 ext4 ro,dirsync,nosuid,nodev,noatime,user_xattr,acl,barrier=1 0 0
/dev/block/dm-4 /mnt/asec/com.chartcross.gpstest-1 ext4 ro,dirsync,nosuid,nodev,noatime,user_xattr,acl,barrier=1 0 0
/dev/block/dm-5 /mnt/asec/com.androidwasabi.livewallpaper.raindrop-1 ext4 ro,dirsync,nosuid,nodev,noatime,user_xattr,acl,barrier=1 0 0
/dev/block/dm-6 /mnt/asec/air.com.slotgalaxy-1 ext4 ro,dirsync,nosuid,nodev,noatime,user_xattr,acl,barrier=1 0 0
/dev/block/dm-7 /mnt/asec/com.farproc.wifi.analyzer-1 ext4 ro,dirsync,nosuid,nodev,noatime,user_xattr,acl,barrier=1 0 0
/dev/block/dm-8 /mnt/asec/air.com.playtika.slotomania-1 ext4 ro,dirsync,nosuid,nodev,noatime,user_xattr,acl,barrier=1 0 0
/dev/block/dm-9 /mnt/asec/com.iudesk.android.photo.editor-2 ext4 ro,dirsync,nosuid,nodev,noatime,user_xattr,acl,barrier=1 0 0
/dev/block/dm-10 /mnt/asec/com.eamobile.life_na_wf-1 ext4 ro,dirsync,nosuid,nodev,noatime,user_xattr,acl,barrier=1 0 0
/dev/block/dm-11 /mnt/asec/com.google.android.apps.plus-1 ext4 ro,dirsync,nosuid,nodev,noatime,user_xattr,acl,barrier=1 0 0
/dev/block/dm-12 /mnt/asec/org.zwanoo.android.speedtest-1 ext4 ro,dirsync,nosuid,nodev,noatime,user_xattr,acl,barrier=1 0 0
/dev/block/dm-13 /mnt/asec/com.phantomefx.standalone.theheist-1 ext4 ro,dirsync,nosuid,nodev,noatime,user_xattr,acl,barrier=1 0 0
/dev/block/dm-14 /mnt/asec/com.joeykrim.rootcheckp-1 ext4 ro,dirsync,nosuid,nodev,noatime,user_xattr,acl,barrier=1 0 0
/dev/block/dm-15 /mnt/asec/com.androidwasabi.livewallpaper.dandelion-1 ext4 ro,dirsync,nosuid,nodev,noatime,user_xattr,acl,barrier=1 0 0
/dev/block/dm-16 /mnt/asec/com.phantomefx.indianspirit_x-1 ext4 ro,dirsync,nosuid,nodev,noatime,user_xattr,acl,barrier=1 0 0
/dev/block/dm-17 /mnt/asec/com.zumobi.msnbc-1 ext4 ro,dirsync,nosuid,nodev,noatime,user_xattr,acl,barrier=1 0 0
/dev/block/dm-18 /mnt/asec/com.slots-1 ext4 ro,dirsync,nosuid,nodev,noatime,user_xattr,acl,barrier=1 0 0
/dev/block/dm-19 /mnt/asec/com.anddoes.launcher.pro-1 ext4 ro,dirsync,nosuid,nodev,noatime,user_xattr,acl,barrier=1 0 0
/dev/block/dm-20 /mnt/asec/com.bvalosek.cpuspy.realgpp-1 ext4 ro,dirsync,nosuid,nodev,noatime,user_xattr,acl,barrier=1 0 0
/dev/block/dm-21 /mnt/asec/com.pokiemagic.KalahariSunFree-1 ext4 ro,dirsync,nosuid,nodev,noatime,user_xattr,acl,barrier=1 0 0
/dev/block/dm-22 /mnt/asec/com.mw.slotsroyale-1 ext4 ro,dirsync,nosuid,nodev,noatime,user_xattr,acl,barrier=1 0 0
/dev/block/dm-23 /mnt/asec/com.phantomefx.leprecoin_x-1 ext4 ro,dirsync,nosuid,nodev,noatime,user_xattr,acl,barrier=1 0 0
/dev/block/dm-24 /mnt/asec/air.com.Slot-1 ext4 ro,dirsync,nosuid,nodev,noatime,user_xattr,acl,barrier=1 0 0
/dev/block/dm-25 /mnt/asec/com.audioaddict.sky-1 ext4 ro,dirsync,nosuid,nodev,noatime,user_xattr,acl,barrier=1 0 0
/dev/block/dm-26 /mnt/asec/com.fishsticksgames.SlotsJourney-1 ext4 ro,dirsync,nosuid,nodev,noatime,user_xattr,acl,barrier=1 0 0
/dev/block/dm-27 /mnt/asec/com.quoord.tapatalkxda.activity-1 ext4 ro,dirsync,nosuid,nodev,noatime,user_xattr,acl,barrier=1 0 0
/dev/block/dm-28 /mnt/asec/com.mxtech.videoplayer.ad-1 ext4 ro,dirsync,nosuid,nodev,noatime,user_xattr,acl,barrier=1 0 0
/dev/block/dm-29 /mnt/asec/mobi.mgeek.TunnyBrowser-1 ext4 ro,dirsync,nosuid,nodev,noatime,user_xattr,acl,barrier=1 0 0
/dev/block/dm-30 /mnt/asec/com.phantomefx.aztecsun_x-1 ext4 ro,dirsync,nosuid,nodev,noatime,user_xattr,acl,barrier=1 0 0
/dev/block/dm-31 /mnt/asec/com.natenai.virtualhorseracing3d-1 ext4 ro,dirsync,nosuid,nodev,noatime,user_xattr,acl,barrier=1 0 0
/dev/block/dm-32 /mnt/asec/com.eamobile.monopoly_full_azn-1 ext4 ro,dirsync,nosuid,nodev,noatime,user_xattr,acl,barrier=1 0 0
/dev/block/dm-33 /mnt/asec/com.phantomefx.balloonblitz-1 ext4 ro,dirsync,nosuid,nodev,noatime,user_xattr,acl,barrier=1 0 0
/dev/block/dm-34 /mnt/asec/com.jrummy.liberty.toolboxpro-1 ext4 ro,dirsync,nosuid,nodev,noatime,user_xattr,acl,barrier=1 0 0
/dev/block/dm-35 /mnt/asec/com.ziplinegames.slotstycoon-1 ext4 ro,dirsync,nosuid,nodev,noatime,user_xattr,acl,barrier=1 0 0
/dev/block/dm-36 /mnt/asec/com.google.zxing.client.android-1 ext4 ro,dirsync,nosuid,nodev,noatime,user_xattr,acl,barrier=1 0 0
/dev/block/dm-37 /mnt/asec/com.phantomefx.bovinebling_x-1 ext4 ro,dirsync,nosuid,nodev,noatime,user_xattr,acl,barrier=1 0 0
/dev/block/dm-38 /mnt/asec/com.koushikdutta.rommanager-1 ext4 ro,dirsync,nosuid,nodev,noatime,user_xattr,acl,barrier=1 0 0
/dev/block/dm-39 /mnt/asec/com.phantomefx.tunzamunny-1 ext4 ro,dirsync,nosuid,nodev,noatime,user_xattr,acl,barrier=1 0 0
/dev/block/dm-40 /mnt/asec/com.hotrod.reference.spiritofseventysix-1 ext4 ro,dirsync,nosuid,nodev,noatime,user_xattr,acl,barrier=1 0 0
/dev/block/dm-41 /mnt/asec/com.phantomefx.standalone.spiritwolf-1 ext4 ro,dirsync,nosuid,nodev,noatime,user_xattr,acl,barrier=1 0 0

And here is the contents of /etc/recovery.fstab from the CWM recovery ramdisk:

# mount point fstype device [device2]

/boot emmc /dev/block/mmcblk0p8
/recovery emmc /dev/block/mmcblk0p22
/efs ext4 /dev/block/mmcblk0p21
/data ext4 /dev/block/mmcblk0p25
/system ext4 /dev/block/mmcblk0p24
/cache ext4 /dev/block/mmcblk0p26
/emmc vfat /dev/block/mmcblk0p28
/sdcard vfat /dev/block/mmcblk1p1 /dev/block/mmcblk1
/sd-ext ext4 /dev/block/mmcblk1p2

And here is the contents of /fstab.qcom back in the normal Android OS:

root@android:/ # cat /fstab.qcom
# Android fstab file.
#<src> <mnt_point> <type> <mnt_flags and options> <fs_mgr_flags>
# The filesystem that contains the filesystem checker binary (typically /system) cannot
# specify MF_CHECK, and must come before any filesystems that do specify MF_CHECK

/dev/block/mmcblk0p24 /system ext4 ro,barrier=1 wait
/dev/block/mmcblk0p26 /cache ext4 nosuid,nodev,barrier=1 wait,check
/dev/block/mmcblk0p21 /efs ext4 nosuid,nodev,barrier=1 wait.check
/dev/block/mmcblk0p25 /data ext4 noatime,nosuid,nodev,barrier=1,noauto_da_alloc wait,check

This, of course, applies to my phone, Samsung Galaxy S Blaze 4G SGH-T769 with custom CWM recovery and custom PACman JB 4.1.2 ROM. You should be able to see the same things on your phone, especially if rooted, and can see where the friendly names of the familiar mount points are at and how it was figured out. There are also other mounts being executed in some of the other startup files. One thing of note, is that the recovery system and Android system may, and probably do, use different mount points and even different mount names for internal storage and external sdcard. For example, in recovery, the internal storage is /emmc and /sdcard and /sd-ext are the external sdcard. Under Android, /sdcard can refer to at least a part of internal storage. Under Android 4.1+ the external card is /storage/sdcard1 and the internal is also /storage/sdcard0. Some of the devices are given multiple mount points (or at least symlinks) with different names pointing to the same device. Confusing as hell, but that's the way it is.