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SubjectRe: New model for managing dev_t's for partitionable block devices
Steven Dake <> said:
> I was thinking of an entirely new model for partitionable block devices.
> Here is how it would work:
> Each physical disk would be assigned a minor number in a group of
> majors. So assume a major was chosen of 150, 151, 152, 153, there would
> be a total of 1024 physical disks that could be mapped. Then the device
> mapper code could be used to provide partition devices in another
> major/group of majors.
> The advantage of this technique is that instead of wasting tons of
> minors on partitions that are never used, partitions could be
> dynamically allocated out of the minor list, allowing for thousands of
> disks with varying numbers of partitions each. Further instead of each
> block device (such as i2o, scsi, etc) having their own set of majors for
> each partitionable disk (which wastes dev_t address space) everything
> would be compressed into the same set of majors.

Great idea! Add another partition, and the minors for everything else on
the system change. Not!
Dr. Horst H. von Brand User #22616
Departamento de Informatica Fono: +56 32 654431
Universidad Tecnica Federico Santa Maria +56 32 654239
Casilla 110-V, Valparaiso, Chile Fax: +56 32 797513
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