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| Precautions for disk expansion |
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| Applicable Models |
| Models with
Windows XP Embedded (CF card type) |
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When an expansion disk (a hard disk, CF card, PCMCIA, USB memory, etc.) is added to the model with preinstalled Windows XP Embedded (CF card type), we recommend taking the following procedure (for the setting of write caching).
Even if the data writing to the expansion disk looks finished on the screen, some access is still active in the OS. Therefore, if the power is turned off at the moment, the data may be damaged. Making a setting to disable write caching mitigates the damage.
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There are two types of write caches: one is used in the OS, and the other is used in the expansion disk. There are some disks in which the cache setting cannot be made. |
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While write caching is disabled, the writing performance may be decreased. |
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Disable the EWF (Write Filter) prior to making the cache setting.
We recommend enabling the EWF (Write Filter) again after the setting is done. |
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How to check the EWF settings in Windows XP Embedded |
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How to disable the EWF (Write Filter) |
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| ■ Procedure |
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1. |
Select the expansion disk in the Explorer, and then go to [Properties] from the [File] menu. Click the [Hardware] tab in the Properties dialog box shown below. |
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2. |
Select a hard disk in [All disk drives], and then click [Properties]. |
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3. |
The dialog box shown below appears. Click the [Policies] tab. |
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4. |
Uncheck [Enable write caching on the device] and click [OK]. After returning to the Properties dialog box of the hard disk, click [OK]. |
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The followings are the meanings of the messages.
| Optimize for quick removal |
-> Disable write caching. |
| Optimize for performance |
-> Enable write caching.
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| Enable write caching on the disk |
-> Enable/ Disable write caching (switchable by a check box) |
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5. |
Reboot the OS. |
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