Data read-write buffer method and buffer device

A technology of data reading, writing and buffering methods, applied in the field of data processing, can solve the problems of restricting the development and implementation of editable UDF optical disc functions, and achieve the effects of reducing the number of reading and writing switching times, improving performance, and protecting drives

Inactive Publication Date: 2010-06-30
SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD
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  • Description
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Problems solved by technology

This rate limits the development and implementation of editable UDF disc functions to a certain extent

Method used

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  • Data read-write buffer method and buffer device
  • Data read-write buffer method and buffer device
  • Data read-write buffer method and buffer device

Examples

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Embodiment Construction

[0057] The present invention will be described in further detail below through specific embodiments and in conjunction with the accompanying drawings.

[0058] In this example, the read-write storage of rewritable optical discs is taken as an example, such as figure 2 As shown, the cache memory Cache has 5 buffer buffers in total, and each Buffer is composed of 32 2048 bytes, so that each Buffer can hold the data of 32 sectors of the optical disc. Below, a 2048-byte area in the Buffer is regarded as a buffer item Buffer Item.

[0059] Each Buffer has a first address M, which is the address of the optical disc sector corresponding to the first Buffer Item in the Buffer. Then, the disk sector addresses corresponding to the 32 BufferItems are M, M+1, M+2, . . . , M+31 respectively. If the Buffer is not used, the initial address M is assigned a value of 0xFFFFFFFF.

[0060] Each Buffer Item in the Buffer uses a Valid Flag to identify whether the data is valid. When writing data...

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Abstract

The invention discloses a data read-write buffer method and a buffer device; the method includes the following steps of writing reserved section data in storage medium to a buffer zone and writing updated data to the buffer zone by a system to form whole buffer zone data for being written to the storage medium. By adopting the method and device of the invention, during the data buffer reading / writing, the non-updated data in the storage medium is written / read, namely when writing the data, the data is read when needed, so as to avoid most of unnecessary reading / writing switching; under the condition of not increasing the memory usage, the data writing or burning speed can be greatly improved.

Description

【Technical field】 [0001] The invention relates to the field of data processing, in particular to a data read-write buffer method and device therein. 【Background technique】 [0002] To realize the Universal Disk Format (UDF) file system on the erasable optical disc, write data needs to use the packet writing (Packet-Writing) method, commonly used erasable optical discs include CD-RW, DVD+ / -RW, DVD- RAM. In the Packet-Writing mode, the number of sectors of the data written each time must be a Packet, and the first address of the data written each time must be an integer multiple of the Packet. At present, the implementation of Packet-Writing is a Read-Modify-Write process. When writing a large amount of data continuously, 32 sector data will be written each time, and a Read / Write switch is required, which greatly affects the write process. Input performance, and frequent Read / Write switching of the optical drive will reduce the service life of the optical drive. figure 1 Wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/06G06F12/08G06F12/0808
Inventor 杨燕泉李理
Owner SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD
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