XtendLan DVR-470B User Manual

Also see for DVR-470B: User guide

Contents

XtendLan DVR-470B User Manual Manual pdf 5 page image

52 Use of the NVR Server2.1 The preparations2.1.1 The organization of the discsThe following points on how to organize the discs should be paid attention to:1. Because of the disc pre-allocation technology, the store unit is data block, and writing operation isfrequent when recording. So it is recommended that divide the hard disc into two or more partitions, thepartition used to store the video data is isolated from the partition where the operation system runs.2. The disc pre-allocation technology reduce the Read\Write head’s wiggle, and cut down the answeringtime, so it is recommended that the partitions on the same hard disc should be put into the same discgroup.3. The disc’s performance has a limitation; in order to lift the Server’s answering ability, it isrecommended that the number of channels that recording at the same time should be less than 64 ineach disc group.4. The record data is stored circularly in every disc group, when the pre-allocated disc space is full, theoldest data will be covered with the newest data. If you need to recording for a long time, please buydiscs big enough.5. SATA HDs are recommended. If using disc matrix to store, whether the IO performance of the discmatrix can satisfy the demand of frequently writing and reading should be confirmed.6. If using the disc matrix to store, the disc matrix should be mapped as the system’s fixed disc partitionsor remote disc partitions.7. Format the disc partitions that are planed to store the video data into NTFS format, or else it will take along time to format when pre-allocation.Note:The symbol of the disc that is assigned to store the record data can’t be changed after being formatted.Another formatting is required if there is a need to change the disc’s symbol. Violating this rule, seriousmistakes will happen in the NVR Server.