Ron and Jenny Hawkins wrote:
Edward,
I wouldn't say far more expensive, but in terms of TCO, SATA DISK is quite
competitive with Tape, with all the value added DASD stuff like Remote Copy,
FCV1 and FCV2, Zero Mount-Position-Rewind time, PAV, multi-user file access,
etc.
Come to think of it, I would much rather DEFRAG a disk based ML2 volume with
FCV2 than recycle Tape based ML2 volume :)
SATA drives attached to mainframe looks veeeery good ...unless you see
the prices... I like very much the idea of HDS TagmaStore USP. You can
attach almost any DASD box you have (in fact, CKD boxes are not
supported) and use it as mainframe/or FBA storage. You can mirror it
using PPRC, you can FlashCopy (Shadowimage) it. Everything is OK, except
the prices. You pay license per TB of external storage attached to USP,
you pay "per TB" fees for PPRC and Shadowimage. At the end you'll find
out the SATA storage is cheap, but the solution is not.
For relatively small to average capacities it is more effective to buy
"previous generation" technology DASD boxes (or second hand - in that
case price is dramatically lower), for large capacities tape is still
cost-effective.
--
Radoslaw Skorupka
Lodz, Poland
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