[Essential Phone Guides, News, & Discussion] bmg1001:
If you're interested in the partition names and locations, here you go:

127|mata:/ # ls -l /dev/block/bootdevice/by-name
total 0
lrwxrwxrwx 1 root root 15 1970-03-31 07:52 abl_a -> /dev/block/sde9
lrwxrwxrwx 1 root root 16 1970-03-31 07:52 abl_b -> /dev/block/sde26
lrwxrwxrwx 1 root root 16 1970-03-31 07:52 apdp -> /dev/block/sde39
lrwxrwxrwx 1 root root 15 1970-03-31 07:52 bluetooth_a -> /dev/block/sde6
lrwxrwxrwx 1 root root 16 1970-03-31 07:52 bluetooth_b -> /dev/block/sde23
lrwxrwxrwx 1 root root 16 1970-03-31 07:52 boot_a -> /dev/block/sde11
lrwxrwxrwx 1 root root 16 1970-03-31 07:52 boot_b -> /dev/block/sde28
lrwxrwxrwx 1 root root 16 1970-03-31 07:52 box -> /dev/block/sda10
lrwxrwxrwx 1 root root 15 1970-03-31 07:52 bspdata -> /dev/block/sda1
lrwxrwxrwx 1 root root 15 1970-03-31 07:52 cdt -> /dev/block/sdd1
lrwxrwxrwx 1 root root 16 1970-03-31 07:52 cmnlib64_a -> /dev/block/sde13
lrwxrwxrwx 1 root root 16 1970-03-31 07:52 cmnlib64_b -> /dev/block/sde30
lrwxrwxrwx 1 root root 16 1970-03-31 07:52 cmnlib_a -> /dev/block/sde12
lrwxrwxrwx 1 root root 16 1970-03-31 07:52 cmnlib_b -> /dev/block/sde29
lrwxrwxrwx 1 root root 15 1970-03-31 07:52 ddr -> /dev/block/sdd2
lrwxrwxrwx 1 root root 16 1970-03-31 07:52 devcfg_a -> /dev/block/sde14
lrwxrwxrwx 1 root root 16 1970-03-31 07:52 devcfg_b -> /dev/block/sde31
lrwxrwxrwx 1 root root 16 1970-03-31 07:52 devinfo -> /dev/block/sde37
lrwxrwxrwx 1 root root 16 1970-03-31 07:52 dip -> /dev/block/sde38
lrwxrwxrwx 1 root root 16 1970-03-31 07:52 dpo -> /dev/block/sde41
lrwxrwxrwx 1 root root 16 1970-03-31 07:52 dsp_a -> /dev/block/sde15
lrwxrwxrwx 1 root root 16 1970-03-31 07:52 dsp_b -> /dev/block/sde32
lrwxrwxrwx 1 root root 15 1970-03-31 07:52 frp -> /dev/block/sda7
lrwxrwxrwx 1 root root 15 1970-03-31 07:52 fsc -> /dev/block/sdf3
lrwxrwxrwx 1 root root 16 1970-03-31 07:52 fsg -> /dev/block/sde35
lrwxrwxrwx 1 root root 16 1970-03-31 07:52 ftmboot -> /dev/block/sda12
lrwxrwxrwx 1 root root 16 1970-03-31 07:52 ftmdata -> /dev/block/sda14
lrwxrwxrwx 1 root root 16 1970-03-31 07:52 ftmsys -> /dev/block/sda13
lrwxrwxrwx 1 root root 15 1970-03-31 07:52 hyp_a -> /dev/block/sde3
lrwxrwxrwx 1 root root 16 1970-03-31 07:52 hyp_b -> /dev/block/sde20
lrwxrwxrwx 1 root root 16 1970-03-31 07:52 keymaster_a -> /dev/block/sde10
lrwxrwxrwx 1 root root 16 1970-03-31 07:52 keymaster_b -> /dev/block/sde27
lrwxrwxrwx 1 root root 15 1970-03-31 07:52 keystore -> /dev/block/sda6
lrwxrwxrwx 1 root root 16 1970-03-31 07:52 limits -> /dev/block/sde43
lrwxrwxrwx 1 root root 16 1970-03-31 07:52 logbk -> /dev/block/sda11
lrwxrwxrwx 1 root root 16 1970-03-31 07:52 logfs -> /dev/block/sde45
lrwxrwxrwx 1 root root 15 1970-03-31 07:52 mdtp_a -> /dev/block/sde8
lrwxrwxrwx 1 root root 16 1970-03-31 07:52 mdtp_b -> /dev/block/sde25
lrwxrwxrwx 1 root root 15 1970-03-31 07:52 mdtpsecapp_a -> /dev/block/sde7
lrwxrwxrwx 1 root root 16 1970-03-31 07:52 mdtpsecapp_b -> /dev/block/sde24
lrwxrwxrwx 1 root root 15 1970-03-31 07:52 misc -> /dev/block/sda5
lrwxrwxrwx 1 root root 15 1970-03-31 07:52 modem_a -> /dev/block/sde5
lrwxrwxrwx 1 root root 16 1970-03-31 07:52 modem_b -> /dev/block/sde22
lrwxrwxrwx 1 root root 15 1970-03-31 07:52 modemst1 -> /dev/block/sdf1
lrwxrwxrwx 1 root root 15 1970-03-31 07:52 modemst2 -> /dev/block/sdf2
lrwxrwxrwx 1 root root 16 1970-03-31 07:52 msadp -> /dev/block/sde40
lrwxrwxrwx 1 root root 16 1970-03-31 07:52 nvcust -> /dev/block/sde48
lrwxrwxrwx 1 root root 16 1970-03-31 07:52 nvdef_a -> /dev/block/sde16
lrwxrwxrwx 1 root root 16 1970-03-31 07:52 nvdef_b -> /dev/block/sde33
lrwxrwxrwx 1 root root 15 1970-03-31 07:52 nvrf -> /dev/block/sda2
lrwxrwxrwx 1 root root 15 1970-03-31 07:52 persist -> /dev/block/sda4
lrwxrwxrwx 1 root root 15 1970-03-31 07:52 pmic_a -> /dev/block/sde4
lrwxrwxrwx 1 root root 16 1970-03-31 07:52 pmic_b -> /dev/block/sde21
lrwxrwxrwx 1 root root 16 1970-03-31 07:52 raw -> /dev/block/sda15
lrwxrwxrwx 1 root root 15 1970-03-31 07:52 rpm_a -> /dev/block/sde1
lrwxrwxrwx 1 root root 16 1970-03-31 07:52 rpm_b -> /dev/block/sde18
lrwxrwxrwx 1 root root 16 1970-03-31 07:52 sec -> /dev/block/sde36
lrwxrwxrwx 1 root root 16 1970-03-31 07:52 splash -> /dev/block/sde42
lrwxrwxrwx 1 root root 15 1970-03-31 07:52 ssd -> /dev/block/sda3
lrwxrwxrwx 1 root root 16 1970-03-31 07:52 sti -> /dev/block/sde46
lrwxrwxrwx 1 root root 16 1970-03-31 07:52 storsec -> /dev/block/sde47
lrwxrwxrwx 1 root root 15 1970-03-31 07:52 system_a -> /dev/block/sda8
lrwxrwxrwx 1 root root 15 1970-03-31 07:52 system_b -> /dev/block/sda9
lrwxrwxrwx 1 root root 16 1970-03-31 07:52 toolsfv -> /dev/block/sde44
lrwxrwxrwx 1 root root 15 1970-03-31 07:52 tz_a -> /dev/block/sde2
lrwxrwxrwx 1 root root 16 1970-03-31 07:52 tz_b -> /dev/block/sde19
lrwxrwxrwx 1 root root 16 1970-03-31 07:52 userdata -> /dev/block/sda16
lrwxrwxrwx 1 root root 16 1970-03-31 07:52 vendor_a -> /dev/block/sde17
lrwxrwxrwx 1 root root 16 1970-03-31 07:52 vendor_b -> /dev/block/sde34
lrwxrwxrwx 1 root root 15 1970-03-31 07:52 xbl_a -> /dev/block/sdb1
lrwxrwxrwx 1 root root 15 1970-03-31 07:52 xbl_b -> /dev/block/sdc1