Messages in this thread | | | Subject | Re: IDE and hot-swap disk caddies | Date | Wed, 27 Mar 2002 06:53:47 +0800 | From | John Summerfield <> |
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> At the interface level, there is some support. > Look at hdparm's -b option to tristate the bus.
There is no mention of -b in hdparm's help screen, and in the man page it's only mentioned in the description of -L.
Is there a newer version of hdparm I need?
> But that's the whole bus. If the controller implements
IDE1? That's okay for me, I can control the hardware configuration to that extent. If the other device is a CD reader, I'm not going to corrupt anything. If necessary, I'll make sure it's unmounted.
> master/slave on one cable, you're hosed, electrically. > It's the whole interface. 95% of controlers are like this. > > Intel's PIIX can do master/slave on separate ports, but > then you loose one bus. Laptops with bays also do things > like this, but that's special hardware, hard to get programming > specs for. > > I think if you add the drive *after* boot, it doesn't > have the benefit of the BIOS setting up PIO/UDMA modes, > so I would try the hdparm -X speed settings also.
At present the system hangs if I add a master when the primary's present, before I get to do anything.
I've not tried adding a slave to an existing master.
As to the BIOS settings, I only configure drives required for booting. I've been doing that for years, before I ever used Linux, when I discovered that OS/2 wasn't paying attention to them. (A good thing in the case of OS/2 as the instructions for one of my drives gave the wrong geometry;-().
> > Jeremy > > ----- Original Message ----- > From: "John Summerfield" <summer@os2.ami.com.au> > Sent: Monday, March 25, 2002 3:16 PM > Subject: Re: IDE and hot-swap disk caddies > > > > > The device is hot-swap capable and has a switch (others have a key) > > > > that locks the drive in and powers it up; in the other position the > > > > drive is powered down and can be removed. > > > > > > Linux doesn't support IDE hot swap at the drive level. Its basically > > > waiting people to want it enough to either fund it or go write the code > > > > > > > What needs to be done? How extensive is the surgery needed? >
-- Cheers John Summerfield
Microsoft's most solid OS: http://www.geocities.com/rcwoolley/
Note: mail delivered to me is deemed to be intended for me, for my disposition.
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