Enhanced Write Filter EWF, Purpose and function

Functions

9.2 Enhanced Write Filter (EWF)

9.2Enhanced Write Filter (EWF)

Purpose and function

The EWF (Enhanced Write Filter) is a function that is only available with Windows Embedded operating systems. It provides write protection that can be configured by the user.

The Enhanced Write Filter allows you to boot Windows Embedded Standard 2009 from write-protected media (such as CD-ROM), to write protect individual partitions and adapt the performance of the file system to your needs (when using CompactFlash cards, for example).

EWF can be used to minimize write access to Compact Flash cards. This is important because the write cycles on Compact Flash cards are limited due to technical reasons. We therefore recommend using EWF if you work with Compact Flash cards.

CAUTION

Activate only one write filter per partition - otherwise you may incur data loss.

Both EWF and FBWF are preinstalled in the SIMATIC IPC images.

Ensure that only one write filter is enabled on a partition, otherwise you may incur data loss.

Note

The Enhanced Write Filter is disabled by default for Windows Embedded Standard 2009. After the operating system has been set up, you should back up your date and then enable the EWF.

Set EWF

The EWFMGR.EXE program can be used to install, enable or disable the EWF. Use the command prompt to call up the program. The following functions are available:

Function	Command
Write-protect drive C: Switching on	ewfmgr c: -enable
Write-protect drive C: disable	ewfmgr c: -commitanddisable
(modified files are accepted)
Modified files on drive C: Accept	ewfmgr c: -commit
Display information about the EWF drive	ewfmgr c:
Display help	ewfmgr c: /h

Note

The EWF commands affecting the write protection do not become active until after the next booting process.

48	SIMATIC IPC427C
	Operating Instructions, 04/2009, A5E02414743-01

IPC427C specifications

The Siemens IPC427C is a robust and versatile industrial PC designed to meet the demands of various applications in manufacturing, automation, and process control. This advanced system is tailored for use in harsh environments and is renowned for its high reliability and performance. One of the key features of the IPC427C is its compact design, allowing seamless integration into existing setups without consuming excessive space. This makes it particularly suitable for environments where space is at a premium.

The IPC427C utilizes powerful Intel processors, providing the necessary computational power to handle complex tasks and data processing. The system supports a range of Intel Core and Xeon processors, ensuring that users can select the configuration that best meets their performance requirements. Additionally, the IPC427C is equipped with an impressive amount of RAM, capable of supporting high-speed memory modules that enhance overall system performance.

Storage options in the IPC427C include both solid-state drives (SSD) and traditional hard disk drives (HDD), catering to various data storage needs. The solid-state drives offer faster data access speeds and higher durability compared to HDDs, making them ideal for critical applications. Users can also benefit from the flexibility in expansion options, as the IPC427C features multiple slots for add-on cards, enabling additional functionalities such as enhanced graphics capabilities or specialized communication interfaces.

Connectivity is another strong point of the IPC427C. Equipped with multiple USB ports, Ethernet connections, and serial interfaces, the system allows seamless integration with various peripherals and networks. This connectivity facilitates real-time data acquisition and communication, essential for modern industrial environments. The IPC427C also supports various protocols and standards, enhancing its compatibility with existing systems and software.

In terms of durability, the IPC427C is designed to withstand extreme temperatures, vibrations, and dust, making it suitable for industrial applications. Its fanless design reduces the likelihood of mechanical failures while ensuring silent operation. With its robust build quality, the IEC527C can operate continuously in demanding conditions, making it a reliable choice for a wide range of industrial applications.

Overall, the Siemens IPC427C stands out as a powerful and flexible industrial PC, combining advanced technologies and robust construction to provide reliable performance in challenging environments. Whether used in factory automation, machine control, or data processing, the IPC427C delivers efficiency and resilience, making it an essential component of modern industrial systems.

Siemens IPC427C manual Enhanced Write Filter EWF, Purpose and function, Set EWF, Function Command

Models: IPC427C

9.2Enhanced Write Filter (EWF)

Purpose and function

Set EWF

Function

Command

IPC427C specifications