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ReadAhead is a technique which should improve disk performance. When small part of the file is read, Linux reads much more data and stores it in internal cache.

To print readahead for disk /dev/hda, use

blockdev --getra /dev/hda

It is printed in 512-bytes blocks

To modify ReadAhead, use

blockdev --setra 1024 /dev/hda

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last edited 2007-05-31 08:31:07 by joilnen