Daniel Pittman wrote:
david <da...@kenpro.com.au> writes:
Daniel Pittman wrote:
david <da...@kenpro.com.au> writes:
Daniel Pittman wrote:
david <da...@kenpro.com.au> writes:
[...]
Chip Driver NCQ DMA++ hotplug PMP
ICH7 family ata_piix, ahci AHCI AHCI AHCI no
Since I still don't want to fry the drive, the question still remains
(for me at least, given that I'm not as erudite as some).... Will this
hotplug??
Yes, if you are running it in AHCI mode. Specifically, you have to be
in something other than "compatibility mode" in the BIOS, and it has to
identify as an AHCI controller during boot.
[...]
Nothing in dmesg. As far as I can see, nothing in BIOS :(
That sucks. Sadly, it was the fashion for vendors to offer only the
compatibility mode of operation for a while.
You could try "lsmod | egrep 'ahci|piix'" and see what the output is.
If both are present, and both are in active use life is harder, but just
one present would be a start.
da...@david:~$ lsmod | egrep -i "ahci|piix"
ata_piix 24580 4
libata 177312 3 pata_acpi,ata_generic,ata_piix
I found this:
http://linux-ata.org/driver-status.html
<quote>
2. Hardware support
Intel ICH "IDE" mode
Driver name: ata_piix
Summary: No TCQ/NCQ. Looks like a PATA controller, but with a few added,
non-standard SATA port controls. Hardware does not support hotplug. "Warmplug"
support is possible.
Update: ICH6/7/8 include support for addressing the SATA PHY registers. This is
not yet supported in Linux, mainly because some BIOS do not fill in the
necessary (PCI BAR) resources.
Update: Boot-time, probe-time issues continue to persist in some cases, related
to the "PCS" register. The ata_piix driver in 2.6.18 and later provides a
"force_pcs" module option to help users deal with this (values: 0=default,
1=ignore PCS, 2=honor PCS). Play around with 'force_pcs' if you have device
detection problems.
</quote>
I wonder what "warmplug" means?
This seems to suggest that hot swapping this particular configuration
is a bad idea. And yet Gnome was telling me that I could remove the
media. Is this a bug?
Well, I have no idea, I fear.
Unfortunately, hardware specifications tend to tell you what a
BIOS/Controller/MB *has*, not what it doesn't have.
*nod* Also, the "operating mode" is probably not going to be listed, so
even "ICH7 SATA" doesn't tell you everything you need to know.
[...]
Not being able to hot-swap for me is mostly an inconvenience rather
than a disaster, but I recently had an emergency situations where I
would REALLY liked to have been able to hot swap.
*nod* Well, you /could/ test it: drop to single user mode, remount
critical filesystems read-only, sync, and pull the device.
Then look for error messages. ;)
Regards,
Daniel
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