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    SubjectRe: re-reading the partition table on a "busy" drive
    On Thu, Sep 07, Michael Tokarev wrote:

    > Is it possible to implement such a feature? I mean, is it
    > easy to know which *partitions* (subdevices?) of the whole
    > device are currently in use, as opposed to the whole drive?

    Its already there, see include/linux/blkpg.h
    parted uses this interface, fdisk and others use the rereadpt ioctl.
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