Re: re-scan ide devices

Andrzej Krzysztofowicz (ankry@pg.gda.pl)
Tue, 6 Jul 1999 10:48:44 +0038 (MET DST)

> when I'm trying to re-scan the IDE devices, I get Input/output error,
> meaning ide_register() function fails... why, and how to fix?
> kernel: 2.2.10
>
> void
> rescan_hwif(int channel)
> {
> int fd;
> int ide[][3] =
> {
> {0x1f0,0x3f6,14},{0x170,0x376,15}
> };
>
> fd=open("/dev/hda", O_RDONLY);
> ioctl(fd, HDIO_SCAN_HWIF, ide[channel]);

The drives on the re-scanned channel must not be in use (mounted,
ioctl-operated, etc.).
If you want to rescan sth on the first IDE channel, you must:
- umount everything from /dev/hdax, dev/hdbx
- swapoff -"- -"- -"-
- use an existing drive from another channel in fopen(), eg. hdc

These are ioctl() limitations...

--
=======================================================================
  Andrzej M. Krzysztofowicz               ankry@mif.pg.gda.pl
  phone (48)(58) 347 14 61
Faculty of Applied Phys. & Math.,   Technical University of Gdansk




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