Re: IDE hot-swap kernel support

[Andrzej Krzysztofowicz]

> 
> The problem comes when I swap drives.  A BLKRRPART causes it to read
> the new partition, and the new drive works.  However, it does not read
> the new drive geometry, so fdisk gets rather confused.  Switching from
> a small HDD to large one and accessing the end of the large drive
> *seems* to work.  Another problem is that if the system is booted with
> no disk in the bay I can't get it to recognize a disk which is
> inserted later.
> 
> It seems to me that what I need is a way to stimulate the ide driver
> to reprobe for a drives on an ide bus.  From looking at
> linux/drivers/ide-probe.c, I don't see any way to manually trigger a
> probe.  Perhaps one should be added - 'echo 1 > /proc/ide/ide1/reprobe'?
> Or even 'echo slave > /proc/ide/ide1/reprobe'?

There's an ioctl() already in ide.c - HDIO_SCAN_HWIF.

Unfortunately it is not stable enough and have some other limitaions.
Maybe /proc interface would be better for that... Andre ?

> Thoughts?

--
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  Andrzej M. Krzysztofowicz               [e-mail]
  phone [phone]
Faculty of Applied Phys. & Math.,   Technical University of Gdansk