removable EIDE disks

I am trying to use removable EIDE hard disks on a Red Hat Linux 6.1 machine, for backup / walknet purposes.

Issuing a BLKRRPART ioctl call immediately after changing the disk works, but only if the new disk is no larger than the disk present at boot time (smaller and equal capacity disks work OK).

How do I get Linux to recognise that the media in /dev/hdc has changed?

Bill Nottingham suggested that I ask you, as he is unsure if this is a bug or if there is a technique that I am missing.

Thanks

Richard Stanton

[email protected]

I imagine your disks are not reporting themselves as 'removable' ? If they correctly report removable then umount/mount would do the necessary I think. It certainly does for magneto-optical

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It should not be necessary to use BLKRRPART.
Does the disk advertise itself as removable?

% dmesg | grep remov
Detected scsi removable disk sda at scsi1, channel 0, id 6, lun 0

Andries
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Try using the HDIO_SCAN_HWIF ioctl instead. This is what I have been using, and it work(ed) just fine. (It seems to result in hard locks on the newer 2.2.x, where x>14, kernels though).

-justin
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