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    SubjectRe: Rescan IDE interfaces
    Hi!

    > > Just for the record (I know this is a reply to an old posting,
    > > but...) I've hotswapped a few IDE drives and have had no problems
    > > at all. a call to hdparm to spin the drive down, then unplugged
    > > it and it worked fine.
    >
    > You got lucky. One of the problems with most IDE drives is that unless
    > the connector is designed for hot swapping, there is no guarantee which
    > pins will make/break contact first. It is possible, in some cases, to
    > damage hardware because contact is made in the wrong order. If data
    > signals are present before the main power or if there are (as there
    > usually are) several different supply voltages (usualy two positive
    > voltages and one negative), the order that they are applied can be
    > important. Connectors designed for hot-swap have pins of differing lengths
    > so that the circuits are broken/restored in a known order.
    >
    > Plan the downtime and swap the drive/cable. What you risk is damage to the
    > controller and all drives on the bus. It might work 49 out of 50 times but
    > that one time will kick your ass and it might happen the first time you
    > try it or the 50th. I know a guy that used to hot-swap drives too. He
    > doesn't anymore. Planned downtime is always a LOT better than unplanned.

    You could

    suspend machine with Gabor's patches, powerdown it, add drive, power
    up, restore saved image, rescan drives; telnet connections could
    survive this if you are fast enough (<5min).

    Pavel

    --
    The best software in life is free (not shareware)! Pavel
    GCM d? s-: !g p?:+ au- a--@ w+ v- C++@ UL+++ L++ N++ E++ W--- M- Y- R+

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