[Miscellaneous Android Development] zenmechanic:
dumchar_info doesn't exist on a A1-830, but I was able to find out the following mappings using the Partition Table App from the Play store:

shell@android:/ $ cat proc/partitions
cat proc/partitions
major minor #blocks name

7 0 37454 loop0
179 0 15376384 mmcblk0
179 1 167936 mmcblk0p1
179 2 8192 mmcblk0p2
179 3 32768 mmcblk0p3 /Factory
179 4 131072 mmcblk0p4
179 5 131072 mmcblk0p5 /Config
179 6 786432 mmcblk0p6 /Cache
179 7 262144 mmcblk0p7 /Logs
179 8 1572864 mmcblk0p8 /system
179 9 12275692 mmcblk0p9 /data
179 40 8192 mmcblk0gp0
179 30 8 mmcblk0rpmb
179 20 4096 mmcblk0boot1
179 10 4096 mmcblk0boot0
253 0 37453 dm-0

Here are the Mounts if needed:

shell@android:/proc $ cat mounts
cat 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/secure tmpfs rw,relatime,mode=700 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/mmcblk0p3 /factory ext4 rw,nosuid,nodev,noatime,data=ordered 0 0
/dev/block/mmcblk0p8 /system ext4 ro,noatime,data=ordered 0 0
/dev/block/mmcblk0p6 /cache ext4 rw,nosuid,nodev,noatime,journal_checksum,journal_async_commit,data=ordered 0 0
/dev/block/mmcblk0p5 /config ext4 rw,nosuid,nodev,noatime,data=ordered 0 0
/dev/block/mmcblk0p9 /data ext4 rw,nosuid,nodev,noatime,discard,journal_checksum,journal_async_commit,noauto_da_alloc,data=ordered 0 0
/dev/block/mmcblk0p7 /logs ext4 rw,nosuid,nodev,relatime,journal_checksum,journal_asyncnone /sys/kernel/debug debugfs rw,relatime 0 0
none /proc/sys/fs/binfmt_misc binfmt_misc rw,relatime 0 0
/dev/fuse /mnt/shell/emulated fuse rw,nosuid,nodev,relatime,user_id=1023,group_id=1023,default_permissions,allow_other 0 0
/dev/block/dm-0 /mnt/asec/com.nuance.swype.dtc-1 ext4 ro,dirsync,nosuid,nodev,no
atime 0 0_commit,data=ordered 0 0

Here's the build.prop:

shell@android:/ $ cat /system/build.prop
cat /system/build.prop
# begin build properties
# autogenerated by buildinfo.sh
ro.build.id=JDQ39
ro.build.display.id=Acer_AV052_A1-830_0.009.05_WW_GEN1
ro.build.version.incremental=eng.svnadmin.20140213.234202
ro.build.version.sdk=17
ro.build.version.codename=REL
ro.build.version.release=4.2.2
ro.build.date=Thu Feb 13 23:43:26 CST 2014
ro.build.date.utc=1392306206
ro.build.type=user
ro.build.user=svnadmin
ro.build.host=nataku09
ro.build.tags=release-keys
ro.product.model=A1-830
ro.product.brand=acer
ro.product.name=a1-830_ww_gen1
ro.product.device=ducati
ro.product.board=clovertrail
ro.product.cpu.abi=x86
ro.product.manufacturer=Acer
ro.product.locale.language=en
ro.product.locale.region=US
ro.wifi.channels=
ro.board.platform=clovertrail
# ro.build.product is obsolete; use ro.product.device
ro.build.product=ducati
# Do not try to parse ro.build.description or .fingerprint
ro.build.description=redhookbay-user 4.2.2 JDQ39 eng.svnadmin.20140213.234202 re
lease-keys
ro.build.fingerprint=acer/a1-830_ww_gen1/ducati:4.2.2/JDQ39/eng.svnadmin.2014021
3.234202:user/release-keys
ro.build.characteristics=tablet
# end build properties

#
# ADDITIONAL_BUILD_PROPERTIES
#
ro.com.android.dateformat=MM-dd-yyyy
ro.config.ringtone=Ring_Synth_04.ogg
ro.config.notification_sound=Proxima.ogg
ro.carrier=unknown
ro.config.alarm_alert=Alarm_Classic.ogg
dalvik.vm.heapstartsize=8m
dalvik.vm.heapgrowthlimit=64m
dalvik.vm.heapsize=256m
dalvik.vm.heaptargetutilization=0.75
dalvik.vm.heapminfree=2m
dalvik.vm.heapmaxfree=2m
dalvik.jit.code_cache_size=1048576
persist.tel.hot_swap.support=true
drm.service.enabled=true
ro.error.receiver.default=com.borqs.bugreporter
sys.widi.media.blank=1
ro.setupwizard.mode=ENABLED
ro.com.google.gmsversion=4.2_r4
ro.ril.status.polling.enable=0
ro.product.cpu.abi2=armeabi-v7a
ro.config.personality=compat_layout
net.bt.name=Android
dalvik.vm.stack-trace-file=/data/anr/traces.txt
ro.build.pandora.id=Acer_AV052_A1-830_RV04RC01_WW_GEN1
ro.build.sku=WW_GEN1
ro.error.receiver.system.apps=com.acer.android.acernidus
ro.com.google.clientidbase=android-acer
ro.product.image_pn=FM.NNFA0.008
ro.product.sku=Wi-Fi

And the recovery.fstab that also provides partition to volume matching:

shell@android:/proc $ cat /system/etc/recovery.fstab
cat /system/etc/recovery.fstab
#size_hint=164
/reserved hidden /dev/block/mmcblk0p1 length=0
#size_hint=8
/panic raw /dev/block/mmcblk0p2 length=0
#size_hint=32
/factory ext4 /dev/block/mmcblk0p3 length=0
#size_hint=128
/misc emmc /dev/block/mmcblk0p4 length=0
#size_hint=128
/config ext4 /dev/block/mmcblk0p5 length=0
#size_hint=768
/cache ext4 /dev/block/mmcblk0p6 length=0
#size_hint=256
/logs ext4 /dev/block/mmcblk0p7 length=0
#size_hint=1536
/system ext4 /dev/block/mmcblk0p8 length=0
#size_hint=0
/data ext4 /dev/block/mmcblk0p9 length=-16384
#size_hint=-1
/mnt/sdcard vfat /dev/block/mmcblk1p1 length=0

I hope this helps!