Understanding the Local File System
The Management Input/Output (MIO/UMIO/MIO2) card provides control and management for the system.
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/flash - Flash memory located on the circuit board of the MIO/UMIO/MIO2, is the default storage media for the operating system software image, CLI configuration, and crash log files used by the system.
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/usb1 - This device is available when a USB memory stick is inserted on the front panel of the active MIO/UMIO/MIO2.
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/hd-raid - This is the solid state hard disk array supported by the Fabric and Storage Cards (FSCs) and accessed via the active MIO/UMIO/MIO2.
File Types Used by the Local File System
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Operating System Software Image File: This binary file type is identified by its .bin extension. The file is the operating system that is loaded by the system upon startup or reloading. This is an executable, read-only file that cannot be modified by end users.
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CLI Configuration File: This file type is identified by its .cfg extension. These are text files that contain CLI commands that work in conjunction with the operating system software image. These files determine services to be provided, hardware and software configurations, and other functions performed by the system. The files are typically created by the end user. You can modify the files both on and off-line and use descriptive long filenames.
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System File: Only one file identified by a .sys extension is used by the system. The boot.sys file contains system-specific information, which describes how the system locates, and in what priority it loads, file groups (paired .bin and .cfg files) from its boot stack.
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Abridged Crash Log: The abridged crash log, identified by its crashlog filename, contains summary information about software or hardware failures that occur on the system. This file is located in the /flash/crsh2/ directory on the device. You can view the contents of this file through the CLI, but you cannot modify the file.
Understanding the boot.sys File
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bootmode: This setting is typically configured to normal, and identifies how the system starts.
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network interface configuration: Use these optional boot method settings when you configure the system to obtain its operating system image from an external network server that is using one of the management LAN interfaces on the MIO/UMIO/MIO2 card.
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boot stack information: The boot stack is made up of prioritized file group entries that designate the operating system image file and the CLI configuration file to load.
When a system is started for the first time, the boot.sys file is configured to use the normal boot mode and load the operating system software image from the /flash directory.
There is no CLI configuration file contained on the local file system. This causes the system to automatically start its CLI-based Quick Setup Wizard upon the first successful boot. Refer to Getting Started for more information on using the Quick Setup Wizard.