Linus Torvalds wrote:
On Thu, 14 Dec 2006, Alistair John Strachan wrote:
`hddtemp' has stopped working on 2.6.20-rc1:
Hmm. Can you do the strace on a working kernel too? For example, is it
that the 0x30d ioctl (which is HDIO_GET_IDENTITY) used to work? If it's a
SATA device, and you _used_ to use the PATA drivers, some of the old
IDE-only ioctl's simply don't work when used in native SATA
configurations.
[ Side note: I consider that to be a mis-feature, but it's not a new
regression, it's always been that way: different block subsystems have
had their own "private" ioctl spaces.
We've been moving more and more towards a unified space, and we could
probably make scsi_ioctl.c emulate at least _some_ of the HDIO_xxx calls
too, and try to support all the block ioctl's on all block devices
rather than have some that work only on some certain class of hardware.
FWIW, libata generally follows a "implement it, if enough people care
about it" policy for the old HDIO_xxx ioctls.
There are plenty of HDIO_xxx ioctl should that have died back in the
days when people using the 'hd' driver rather than the newfangled IDE
driver.
So this change sorta filters out a lot of those older ioctls.
hddtemp is open source and reasonably well known, so I would certainly
like to support it, if its reasonable. For ATA disks, obtaining the
temperature sometimes requires vendor-specific or firmware-specific
knowledge. hddtemp centralizes all that info in a database.
Jeff
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