Hi viet.nb,
Here is the procedure to perform the format install via USB,
USB:
To perform this recovery installation, the USB Drive should be formatted to FAT-32 & should be empty.
Copy the Junos package to USB flash drive.
Power off the EX switch
Put the USB flash drive in the EX switch.
Power on the EX switch.
After the 'Loading getting /boot/default/loader.conf' displays, hit space bar for the
loader>prompt.Issue the install command with the format option:
loader> install --format file:///<Junos package name>For example:
loader> install --format file:///jinstall-ex-4200-10.4R2.6-domestic-signed.tgz
Note: Both the installation methods proceed as normal and ends with a login prompt. The username should be root & no password prompt since the file system been formatted.
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//Nex