Re: IDE and hot-swap disk caddies

Jeremy Jackson
2002-03-28T16:30:39Z

I was suggesting that there are common cases where
the electrical parts at the drive (single drive) end are
taken care of.

what comes before is an hdparm -b 2 (tristate),
then power off drive, then yank it out. (if the
PCI chipset supports it, and the driver supplies a
control method)

The parts that are still rough are when you put it back
in, it doesn't have the benefit of the BIOS transfer
speed/type initialization, or the ide driver's bus scan.

Bottom line for me, I think there's enough merit to this
(although not 100% - you can only dress up frankenstein
so much) , and I'm working on cleanups, so please don't
remove the code from the next version, and anyone else
working on it, please continue, that's all.

Jeremy

----- Original Message -----
From: "Alan Cox" <alan@lxorguk.ukuu.org.uk>
To: "Jeremy Jackson" <jerj@coplanar.net>
Sent: Thursday, March 28, 2002 1:33 AM
Subject: Re: IDE and hot-swap disk caddies

> > -some very cheap IDE swap bays have a mechanical interlock
> > with the power switch. Your turn the key, and the drive shuts
> > off, before you can pull it out. power sequencing solved? don't
>
> No - you also have to isolate the IDE bus
>
> > -PCMCIA has electrical hot swap support...?
>
> Yes - but PCMCIA is effectively hot swap ISA bus, the controller is on
> the pcmcia card - different ball game
>