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Re: firewire storage solution recommended


On Mon, 18 Feb 2002, Patrick Hsieh wrote:

> On Mon, 18 Feb 2002 17:20:35 +0800 Jason Lim wrote:
> > > But if question is "can two hosts mount the same 1394 device (in R/W
> > > mode) at the same time ?", the answer is definetly no. At least with
> > > "conventional" FS (ext2/3, fat, etc.), for various reasons, including
> > > : kernel level read/write cache, which can assume things about what's
> > > on the drive and what's not (yet), no locking, etc.
> Then is there any explanation for the case of SAN? Multiple server use
> fiber to access the same storage device. How come? Any good reference?

That's usually done differently, using an OS that contains code to deal
with locking and cache coherency issues between the cluster members,
by communicating through a fast network channel such as fiber.

Linux's FSes can't do that. Not yet, anyway.



E-Advies / Emile van Bergen   |   e-advies@evbergen.xs4all.nl
tel. +31 (0)70 3906153        |   http://www.xs4all.nl/~evbergen/

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