Linux-kernel mailing list archive 1999-20,: Re: host (multibus) failover

# Re: host (multibus) failover

Pavel Machek (pavel@bug.ucw.cz)
Sat, 15 May 1999 21:30:36 +0200

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Hi!

> Okay, I just looked everywhere I could think of and didn't see anything
> mentioned about support in Linux for a multibus failover configuration.
> Basically, a disk would be accessible on several host adapters (SCSI
> adapters, whatever) and can be accessed through whichever ones work. This
> technique is used in (at least) VMS and NT to get more redundancy in
> several high-end storage systems, Digital StorageWorks being the one I know
> about. I'm interested in implementing this for Linux, but a few questions
> first.
>
> 1. Is this done? Did I miss it somewhere? I'd hate to duplicate someone's
> work.

Someone did something very similar with nbd and 100mbit ethernet. He
gave me few very good patches into nbd, promissed to write a readme,
and I never heard from him again ;-).

Pavel
PS: Almost no kernel hacking should be required. I believe everything
is there and "only" userland scripts + configuration should be
required. (Which does not mean task is easy.)

    --
    I'm really pavel@ucw.cz. Look at http://195.113.31.123/~pavel.          Pavel
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