Western Digital WD5000H1S Quick Install Guide (pdf) - Page 6

Q: Can I disconnect the DVR Expander from a DVR? A: Do not unplug or disconnect the drive while the DVR unit is plugged in or operating. To safely disconnect the drive from a DVR, first unplug the DVR from its power source, wait 10 seconds, and then disconnect the DVR Expander. Disconnecting the DVR Expander will cause the DVR to restart. It will not recover until the DVR Expander is reconnected and the DVR is subsequently restarted, or the drive is permanently removed (see "Permanently Removing the DVR Expander" on page 3). Programs are not recorded when the DVR Expander is disconnected. Q: Where should I place the DVR Expander drive in an entertainment center? A: It is up to you. However, do not obstruct the front panels of the DVR Expander drive as this will reduce its cooling airflow. Note: Some electronic components have vent holes in the tops and sides allowing heat to escape. Do not stack the DVR Expander on top of, or block the vent holes of, other components in your entertainment center. Q: How will I know when the DVR Expander drive is almost out of recording space? A: The TiVo® DVR uses the DVR Expander as if it were part of the internal hard drive. When trying to schedule the next recording, the DVR will provide an on screen warning if there is insufficient space available. If this is the case, you may need to delete some previously recorded programs. Q: What if my DVR malfunctions or needs to be replaced? A: Any previously recorded content on your DVR Expander will not be available for viewing on your new DVR, and the DVR Expander will have to be reformatted before use, causing all recordings that were previously saved to be erased. Using My DVR Expander with TiVo® DVRs | 5