> The current limit is 512mb of cache for a certain SCSI cache controller
> which was about to ship or maybe is already shipping. That's going
> to be a large ``hole'' in a fs ... At least it will write data back
> without OS intervention, so really only powerfails but not a freeze of
> the machine will cause the worst case to happen.
If this is the hardware I'm thinking of, then when you tell it to
flush and write hard - it will. This is necessary for JFS, etc.
I'm not sure about DPT, but I think some vendors have battery backed
memory to retain enough state to cleanly flush the disk in the event
of power failure.
-cw
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