Roberts, John J wrote:
John Eells wrote:
Actually, z/OS has supported 1TB drives (EAVs) on DS8Ks since z/OS R10, which went out of
service last year. In R10 we supported VSAM, in R11 we added Extended Format sequential,
and in R12 (the oldest release now in service) we added support for "almost
everything else." There are still some outliers for system-level data sets (RACF
DB, page data sets, NUCLEUS, etc.) but the vast majority of application data can now live
happily on an EAV so long as it's read and written using system access methods.
How far off is IBM from offering SSD technology in their disk arrays? And what
will large scale adoption of SSD do to change data protection strategies? For
example, while I have heard that SSD's are much more reliable than HDD, but
when they do fail, it is the whole device that is gone, whereas HDD dies slowly
in most cases.
They have been available since February 2009. The DS8K uses a RAID
array of SSD devices and dynamic chip sparing if I recall correctly.
--
John Eells
z/OS Technical Marketing
IBM Poughkeepsie
[email protected]
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