When unpacking and installing a new Pure Storage FlashArray controller, the initial configuration-such as assigning management IP addresses, subnet masks, and gateways via the puresetup utility-must be done completely out-of-band. Because the array does not yet have an IP presence on the customer's network, the Implementation Engineer must connect directly to the controller's serial console port using a standard serial-to- USB adapter and terminal emulation software (such as PuTTY, SecureCRT, or Tera Term).
To successfully establish a readable CLI session with the custom Linux microkernel running on the FlashArray controllers, the terminal emulator must be configured with the exact serial communication parameters expected by the array. According to Pure Storage hardware documentation, the mandatory COM port settings are:
* Baud Rate (Speed): 115,200
* Data Bits: 8
* Parity: None (N)
* Stop Bits: 1
* Flow Control: None
This configuration is universally abbreviated as 115200 8-N-1 . If an engineer attempts to use older standard speeds (like 9600 or 38400 baud) or leaves flow control (like Xon/Xoff or RTS/CTS) enabled, the terminal window will display unreadable, garbled characters (often referred to as "wingdings"), or the keyboard inputs will fail to register entirely, preventing the initialization of the array.