OK but it is far from *INSTANT* the propagation delay is still there,
no matter how fat (big) of pipline you may have, right?
Ed, I don't quite see your point.
In the technologies that Ron and I described, when you access the data
on the target disk, it either reads it from the target (a track already
copied) or reads it from the source (an unupdated track not yet copied),
the speed is about the same. So when you access the disk to back it
up, the read speed is about the same as if you were accessing the
original disk.
BTW, we are not describing remote copies, to another control unit, we
are describing replication technology from one location to another in
the same control unit. No pipeline involved, just read-cache-write
--
Bruce A. Black
Senior Software Developer for FDR
Innovation Data Processing 973-890-7300
personal: [EMAIL PROTECTED]
sales info: [EMAIL PROTECTED]
tech support: [EMAIL PROTECTED]
web: www.innovationdp.fdr.com
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