[General Questions and Answers] ndt44:
In case anyone is still attempting to root these, here is some partition info from my active, working E6820 AT&T DuraForce Pro: (from an app called DiskInfo)

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Internal Storage

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* zram0 [zram0] Not mounted

Total space: 512 MB

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Internal Storage (MMC)

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* modem [mmcblk0p1] (/firmware) [vfat]

Used: 83.1 MB, Free: 8.9 MB, Total space: 92 MB

* sbl1 [mmcblk0p2] Not mounted

Total space: 1 MB

* sbl1bak [mmcblk0p3] Not mounted

Total space: 1 MB

* rpm [mmcblk0p4] Not mounted

Total space: 512 KB

* rpmbak [mmcblk0p5] Not mounted

Total space: 512 KB

* tz [mmcblk0p6] Not mounted

Total space: 2 MB

* tzbak [mmcblk0p7] Not mounted

Total space: 2 MB

* cmnlib64 [mmcblk0p8] Not mounted

Total space: 512 KB

* cmnlib64bak [mmcblk0p9] Not mounted

Total space: 512 KB

* cmnlib [mmcblk0p10] Not mounted

Total space: 512 KB

* cmnlibbak [mmcblk0p11] Not mounted

Total space: 512 KB

* keymaster [mmcblk0p12] Not mounted

Total space: 512 KB

* keymasterbak [mmcblk0p13] Not mounted

Total space: 512 KB

* devcfg [mmcblk0p14] Not mounted

Total space: 512 KB

* devcfgbak [mmcblk0p15] Not mounted

Total space: 512 KB

* aboot [mmcblk0p16] Not mounted

Total space: 2 MB

* abootbak [mmcblk0p17] Not mounted

Total space: 2 MB

* boot [mmcblk0p18] Not mounted

Total space: 64 MB

* recovery [mmcblk0p19] Not mounted

Total space: 64 MB

* fota [mmcblk0p20] Not mounted

Total space: 64 MB

* fotabk [mmcblk0p21] Not mounted

Total space: 64 MB

* devparam [mmcblk0p22] Not mounted

Total space: 10 MB

* splash [mmcblk0p23] Not mounted

Total space: 25 MB

* reserve1 [mmcblk0p24] Not mounted

Total space: 512 KB

* reserve2 [mmcblk0p25] Not mounted

Total space: 512 KB

* system [mmcblk0p26] Not mounted

Total space: 4.5 GB

* Cache [mmcblk0p27] (/cache) [ext4]

Used: 89.9 MB, Free: 2 GB, Total space: 2.1 GB

* Data (userdata) [mmcblk0p28] (/data) [ext4]

Used: 18.7 GB, Free: 2.7 GB, Total space: 21.5 GB

* dsp [mmcblk0p29] (/dsp) [ext4]

Used: 8.2 MB, Free: 7.8 MB, Total space: 16 MB

* mdtp [mmcblk0p30] Not mounted

Total space: 32 MB

* devinfo [mmcblk0p31] Not mounted

Total space: 8 MB

* carrier [mmcblk0p32] (/carrier) [ext4]

Used: 5.5 MB, Free: 34.5 MB, Total space: 40 MB

* fotamng [mmcblk0p33] Not mounted

Total space: 257 MB

* reserve3 [mmcblk0p34] Not mounted

Total space: 56 MB

* reserve4 [mmcblk0p35] Not mounted

Total space: 2 MB

* reserve5 [mmcblk0p36] Not mounted

Total space: 2 MB

* fsc [mmcblk0p37] Not mounted

Total space: 512 KB

* ssd [mmcblk0p38] Not mounted

Total space: 512 KB

* DDR [mmcblk0p39] Not mounted

Total space: 512 KB

* fsg [mmcblk0p40] Not mounted

Total space: 2 MB

* misc [mmcblk0p41] Not mounted

Total space: 1 MB

* keystore [mmcblk0p42] Not mounted

Total space: 512 KB

* config [mmcblk0p43] Not mounted

Total space: 512 KB

* oem [mmcblk0p44] Not mounted

Total space: 64 MB

* limits [mmcblk0p45] Not mounted

Total space: 512 KB

* mota [mmcblk0p46] Not mounted

Total space: 512 KB

* reserve6 [mmcblk0p47] Not mounted

Total space: 512 KB

* dip [mmcblk0p48] Not mounted

Total space: 1 MB

* syscfg [mmcblk0p49] Not mounted

Total space: 512 KB

* mcfg [mmcblk0p50] Not mounted

Total space: 4 MB

* apdp [mmcblk0p51] Not mounted

Total space: 512 KB

* msadp [mmcblk0p52] Not mounted

Total space: 512 KB

* dpo [mmcblk0p53] Not mounted

Total space: 512 KB

* log [mmcblk0p54] Not mounted

Total space: 60 MB

* logwork [mmcblk0p55] Not mounted

Total space: 32 MB

* kcs [mmcblk0p56] (/kcs) [ext4]

Used: 9.5 MB, Free: 480 KB, Total space: 10 MB

* cslog [mmcblk0p57] Not mounted

Total space: 16 MB

* bootwork [mmcblk0p58] Not mounted

Total space: 16 MB

* sum [mmcblk0p59] Not mounted

Total space: 1 MB

* sec [mmcblk0p60] Not mounted

Total space: 512 KB

* chkcode [mmcblk0p61] Not mounted

Total space: 512 KB

* dnand [mmcblk0p62] Not mounted

Total space: 8 MB

* sysprop [mmcblk0p63] (/pstore) [ext4]

Used: 6.1 MB, Free: 1.9 MB, Total space: 8 MB

* persist [mmcblk0p64] (/persist) [ext4]

Used: 5.2 MB, Free: 10.8 MB, Total space: 16 MB

* modemst1 [mmcblk0p65] Not mounted

Total space: 2 MB

* modemst2 [mmcblk0p66] Not mounted

Total space: 2 MB

* bfss1 [mmcblk0p67] Not mounted

Total space: 4 MB

* bfss2 [mmcblk0p68] Not mounted

Total space: 8 MB

* reserve7 [mmcblk0p69] Not mounted

Total space: 7 MB

* kcs_work [mmcblk0p70] Not mounted

Total space: 1 MB

* mmcblk0rpmb [mmcblk0rpmb] Not mounted

Total space: 4 MB

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SD Card

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* android_meta [mmcblk1p1] Not mounted

Total space: 16 MB

* android_expand [mmcblk1p2] Not mounted

Total space: 14.8 GB

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device-mapper

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* System [dm-0] (/system) [ext4]

Used: 3.4 GB, Free: 1 GB, Total space: 4.5 GB

* dm-1 [dm-1] (/devparam) [ext4]

Used: 4.4 MB, Free: 5.5 MB, Total space: 9.9 MB

* dm-2 [dm-2] Not mounted

Total space: 21.5 GB

* dm-3 [dm-3] (/mnt/expand/hexSerialNumber) [ext4]

Used: 11.3 GB, Free: 3.6 GB, Total space: 14.8 GB

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tmpfs mount points

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* /dev [tmpfs]

Used: 124 KB, Free: 890 MB, Total space: 890 MB

* /mnt [tmpfs]

Used: 0 B, Free: 890 MB, Total space: 890 MB

* /storage [tmpfs]

Used: 0 B, Free: 890 MB, Total space: 890 MB

* /storage/self [tmpfs]

Used: 0 B, Free: 890 MB, Total space: 890 MB

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Memory

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* RAM

Used: 1.3 GB, Free: 465 MB, Total space: 1.8 GB

* Swap

Used: 476 MB, Free: 35.5 MB, Total space: 511 MB