Poor writing performance when using fixed packet writing

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Applies to Products: All

Applies to Operating Systems: All

Symptoms

When recording a disc using fixed packet writing the performance is extremely poor.

Cause

Packet writing in itself is slower then 'at once' recording methods since the data is not streamed to the drive but sent in small chunks or packets.

In addition, after writing each packet, GEAR will perform a read after write to ensure that the data was recorded correctly. This also increases total recording time.

In some cases however, the performance is much lower then should be expected. In these cases, write and/or read commands are failing, forcing GEAR to perform multiple retries to ensure the integrity of the data.

These write and read errors can have numerous causes:

The recordable media is bad due to dirt, scratches or over use. The drive does not correctly support the brand and/or type of recordable media used. The drive poorly supports fixed packet writing. Solution The following guidelines should be followed when using fixed packet writing:

It is recommended to use new discs and once they have been formatted, use them exclusively for fixed packet writing. When using previously used discs it is recommended to always perform a full erase prior to formatting. Check the discs regularly for damage such as scratches, dirt and fingerprints and replace them when necessary. Before purchasing media, check the drive's manual and/or the drive manufacturer's website to see which brands and types of recordable media are supported by the drive. Try another brand of drive to see if the performance improves. Some drives do not support fixed packet writing well.

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