How to find out sd card partition in dev/block?

Question

In order to mount an ext4-formated sd card in Android I followed this guide.



In the bash script msd2.sh is followking command:



mount -t ext4 /dev/block/mmcblk1p1 /storage/extSdCard && sleep 5 && /system/bin/vold



So in this part the mmcblk1p1-partition shall be mounted in /storage/extSdCard.




  1. How can I find out which of the partitions in dev/block is my sd-card ?



Furthermore I cannot mkdir a folder in /storage to have an equivalent mountpoint: mkdir failed for /storage/extSdCard, Read-only file system




  1. How do I get read-write access of \storage ?



Info:




  • Phone: Sony Xperia Z1

  • Model number: C6903

  • Android version: 5.1.1

  • Build Number: 14.6.A.1.236


— goulashsoup | Sources

Answer



  1. How can I find out which of the partitions in dev/block is my sd-card ?




By default, external memory card's partition is /dev/block/mmcblk1p1 in all devices.

(Unless if you have partitioned the memory card, then you should know which partition to use, for example, if you have partitioned 32GB memory card as first 16GB as FAT32 partition & second 16GB as EXT4 partition, to use the EXT4 partition, you'll be using mmcblk1p2)





  1. How do I get read-write access of /storage ?




I hope by r/w access you mean creating a directory (mount point) to mount the external SD card.



You cannot do that after the device has booted, atleast since KitKat(?).
The only way to do that would be by editing the ramdisk of your boot.img according to your requirement.


— Gokul NC | Sources

Q & A

Unknown file type containing a virus
How can I run a custom .sh script at each startup (without native init.d support)?
Keep app from opening when clicking a link
Android phone HDD/SSD 2.5"/1.8" - how much power is too much?
Do I loss Apps and Data
Xiaomi Redmi 1S bootloop on inserting battery
How to troubleshoot/debug slow phone that burns battery?
"Change your phone number?" notification
What is this "shadow" called and what's the purpose?
How does the Google Calendar app determine which images to show me for the seasons?
lg phone Starts on recovery mode automatically
How is Android allowed to use the name "Oreo"?
Clearing user data for Google Play Services
Anyway to split apps sharing an UID?
When will my device get the Android 8.0 update (Oreo)?
How do you see Memory usage in Android O?
Android Revolution HD on GT-N8010 wifi won't turn on
Android Smart Lock: Why is there no option to use WiFi?
Unfortunately, Google Play services has stopped?
How do I disable Google Chrome from using regional google search?

Topics

2D Engines   3D Engines   9-Patch   Action Bars   Activities   ADB   Advertisements   Analytics   Animations   ANR   AOP   API   APK   APT   Architecture   Audio   Autocomplete   Background Processing   Backward Compatibility   Badges   Bar Codes   Benchmarking   Bitmaps   Bluetooth   Blur Effects   Bread Crumbs   BRMS   Browser Extensions   Build Systems   Bundles   Buttons   Caching   Camera   Canvas   Cards   Carousels   Changelog   Checkboxes   Cloud Storages   Color Analysis   Color Pickers   Colors   Comet/Push   Compass Sensors   Conferences   Content Providers   Continuous Integration   Crash Reports   Credit Cards   Credits   CSV   Curl/Flip   Data Binding   Data Generators   Data Structures   Database   Database Browsers   Date &   Debugging   Decompilers   Deep Links   Dependency Injections   Design   Design Patterns   Dex   Dialogs   Distributed Computing   Distribution Platforms   Download Managers   Drawables   Emoji   Emulators   EPUB   Equalizers &   Event Buses   Exception Handling   Face Recognition   Feedback &   File System   File/Directory   Fingerprint   Floating Action   Fonts   Forms   Fragments   FRP   FSM   Functional Programming   Gamepads   Games   Geocaching   Gestures   GIF   Glow Pad   Gradle Plugins   Graphics   Grid Views   Highlighting   HTML   HTTP Mocking   Icons   IDE   IDE Plugins   Image Croppers   Image Loaders   Image Pickers   Image Processing   Image Views   Instrumentation   Intents   Job Schedulers   JSON   Keyboard   Kotlin   Layouts   Library Demos   List View   List Views   Localization   Location   Lock Patterns   Logcat   Logging   Mails   Maps   Markdown   Mathematics   Maven Plugins   MBaaS   Media   Menus   Messaging   MIME   Mobile Web   Native Image   Navigation   NDK   Networking   NFC   NoSQL   Number Pickers   OAuth   Object Mocking   OCR Engines   OpenGL   ORM   Other Pickers   Parallax List   Parcelables   Particle Systems   Password Inputs   PDF   Permissions   Physics Engines   Platforms   Plugin Frameworks   Preferences   Progress Indicators   ProGuard   Properties   Protocol Buffer   Pull To   Purchases   Push/Pull   QR Codes   Quick Return   Radio Buttons   Range Bars   Ratings   Recycler Views   Resources   REST   Ripple Effects   RSS   Screenshots   Scripting   Scroll Views   SDK   Search Inputs   Security   Sensors   Services   Showcase Views   Signatures   Sliding Panels   Snackbars   SOAP   Social Networks   Spannable   Spinners   Splash Screens   SSH   Static Analysis   Status Bars   Styling   SVG   System   Tags   Task Managers   TDD &   Template Engines   Testing   Testing Tools   Text Formatting   Text Views   Text Watchers   Text-to   Toasts   Toolkits For   Tools   Tooltips   Trainings   TV   Twitter   Updaters   USB   User Stories   Utils   Validation   Video   View Adapters   View Pagers   Views   Watch Face   Wearable Data   Wearables   Weather   Web Tools   Web Views   WebRTC   WebSockets   Wheel Widgets   Wi-Fi   Widgets   Windows   Wizards   XML   XMPP   YAML   ZIP Codes