/system folder contains your operative system. That is why it won't boot anymore.
Xiaomi's default MiRecovery permits only installing a ROM located in your root directory (the main folder, corresponding to location
/) and named
update.zip. Since you can't access your phone directly, you have to put this file in it using your computer. This will include installing a better recovery.
This instructions are for a Windows system, if you are using another OS just tell me.
Step 1: Install Fastboot on your Windows system
Download this file, it is an installer for the strict indispensable tools you need to put files on your softbricked phone from your PC.
Install it and say yes both to the adb and the driver questions.
Step 2: Download latest MIUI ROM for Xiaomi Redmi 1S
Download the last MIUI ROM for you device from the official MIUI Eglish forum. Move it to the
C:\adb folder the installation process created.
Step 3: Reload your phone to fastboot and flash CWM
When your device is turned off, connect it to your PC via USB and hold the power and volume down button. You should see the MiBunny operating as a mechanic to an Android robot.
Open a command prompt in Windows (Start --> cmd.exe). Type
cd C:\adb and then
fastboot devices. You should see an hexadecimal code followed by "device". If not, tell me in the comments.
Now download the file you find at this link, it is our recovery.
.img file you find inside and rename it
recovery.img. Place it in
In the command prompt, address this command
fastboot flash recovery recovery.img
Now reboot your phone to recovery using the power and volume up buttons. You should see the new recovery.
Step 4: Copy the ROM in your phone
While your phone is in recovery mode, type
adb devices and you should see again a code and "device". Then move your rom
.zip file in your
C:\adb folder and address these commands:
adb push nameofrom.zip /data/
nameofrom with the name of the zip archive of the rom you have downloaded (probably miui_HM1SWC_JHCCNBL50.0_42c35e6c1b_4.3). If you want, rename the zip to address the command with more ease.
Step 5: Install the ROM
When the push process has succesfully finished, navigate through your phone's recovery to
install from internal memory or something like that. Select the zip you just pushed. It will start installing and, after finished, your phone should boot again upon reboot.