On Sat, 17 Apr 1999, Ted Byrd wrote:
Hi,
>>> by the master. If on a [hda-hdc]+[hdb-hdd] raid 0+1 the master device
>>> of *any* IDE controller fails, the slave will inmediatly fail also
>>> (I'd bet it surelly will happen if it's the slave who fails, so this
>>> statement could be widened to "if *any* disc fails"), rendering your
>>> raid 0+1 inmediatly unusable, and making recovery thougher.
>> I'm not so sure about this, as I think I've seen IDE drives that were
>> jumpered as a slave (with no master on the bus) get detected by Linux
>> before.
> This is true, especially for CD-ROM drives, which I always configure as
> slave devices, even when they're the only thing on the channel. Also,
> IDE drives aren't on a controller, they ARE a controller -- Integrated
> Drive Electronics (IDE) -- means each drive has it's own controller
> built in. I am not savvy enough to understand how the master/slave
> relationship works though, someone please educate me! :)
That's why I said that; the master disc has a dual controller;
chances are that if the master disc fails (electronically) the slave disc
would become "uncontrolled" :)
gretings,
*****---(*)---**********************************************---------->
Francisco J. Montilla Systems & Network administrator
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INSFLUG (LiNUX) Coordinator. www.insflug.org - ftp.insflug.org
