Specifications

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Chapter 3: External Storage and SAN Subsystems 66/116
9es3s1c3.doc
Rev 5.9
02/12/2003
5.2.5. Symmetrix Data Protection
Unique customer value can be derived from the ability to have Symmetrix products support disk arrays
that can be protected with:
•
Mirroring (RAID 1)
provides the highest level of performance and availability for all mission-
critical and business critical applications by maintaining a duplicate copy of volumes on two disk
devices.
•
RAIDS:
offers more usable capacity than a mirrored system containing the same number of disk
drives through performance-enhanced parity-based data protection.
•
Symmetrix Remote Data Facility (SRDF)
:
an enhanced version of mirroring for multiple storage
system data protection and availability that can include multiple sites.
•
Dynamic Sparing option
which reserves disk drives as standby spares. This option increases data
availability without impacting performance and can be used in conjunction with Mirroring, RAID-
S, or SRDF.
This capability allows optimization for the best relationships of availability, performance, and cost for
individual data sets. These options are configurable at the physical volume level so that different levels
of protection can be applied to different data sets within the same Symmetrix system. This unique
flexibility allows the customer to maintain the lowest possible costs in relation to the necessary levels
of performance and data availability.
5.3. Symmetrix 3000 Family
Discontinued.
5.3.1. Symmetrix 3930-18/36 Architecture