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Raw I/O Enhancements
Raw I/O enhancements provide high-bandwidth low-overhead scsi disk I/O capabilities. See the FAQ for description.
To enable raw scsi character devices enable the CONFIG_RAW scsi configuration variable.
The various releases of the raw I/O enhancements are available for download from:
As of 05/23/00, there is a new patch enhancing Stephen Tweedie's rawio patchset for the 2.3.99.pre9-2 kernel. This patch allows the I/O queueing and scsi-midlayers to handle kiobuf-based request directly (w/o intermediate buffer_heads). This kiobuf-enhancement patch combines Steven Tweedie's patchset with the scsi and queueing layer enhancements.
There are three patches against the 2.2.13 version of the linux kernel:
Sgi Enhancements to Stephan's 2.2.13 patch
A patch for 2.2.13 which includes Stephan's and SGI's changes
A version of the dd(1) command which works with raw devices can be downloaded from:
Information on this project can be found at:
http://oss.sgi.com/projects/rawio/