On 06/02/2006, at 1:48 AM, Steven Haigh wrote:
On 06/02/2006, at 1:19 AM, Peter Robinson wrote:
I've been trying to find information on how to hot-swap the drive
bay
on Dell laptops - ala windows style - and still get to use the DVD
drive after inserting it while the system is running - and not
having
the system hang when removing the bay while booted.
Has anyone managed to do this? I haven't been able to find any
packages in FC's list that seems to manage this at all...
Along this line of thinking what's the status of support for other
hotplugging of things like docking stations on laptops?
Interestingly enough, I've found the following script:
http://mikehardy.net/linux_latitude_d800/idectl
What it seems to do is use hdparm to disable the secondary IDE
channel, and reenable it again when you use it. I've found that
this actually stops the machine from crashing when swapping out the
DVD drive. This is done by running 'idectl 1 off'. When you are
ready to swap the drive back in, you insert the drive, then run
'idectl 1 on'. This then re-enables the secondary IDE controller,
and the kernel detects the drive again.
What I have noticed however, is that when the drive is reattached/
redetected, DMA mode is disabled. If cannot be re-enabled by using
'hdparm -d1 /dev/hdc' - so the drive only runs in PIO mode. This
means performance really sucks.
Does anyone know enough about why this happens to try to hack a
workaround for this? It would be awesome to get DMA running again
after a hot-swap-in.
After testing this, I've lodged it as BZ #180161.
--
Steven Haigh
Email: netwiz@xxxxxxxxx
Web: http://www.crc.id.au
Phone: (03) 9017 0597 - 0412 935 897
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