Bruce,
I thought the compression took place in the control unit, so the full amount
of data went over the escon channel, and was compressed by the hardware
before writing or reading. How does that triple the effective tape rate to
27MB/sec. over the escon channel?
Eric Bielefeld
Sr. z/OS Systems Programmer
Milwaukee Wisconsin
414-475-7434
----- Original Message -----
From: "Bruce Black" <[EMAIL PROTECTED]>
On the tape, the max sustained rate is 9 MB/sec, but compression
effectively triples the data rate (on the average, compression ratios
vary) so the effective tape rate is around 27MB/sec. this is a good
argument for FICON channels on 3590 drives, to make the channel faster
than the tape.
> 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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