IBM System Storage DS Architecture and Implementation. Front Cover. IBM Redbooks, Bertrand Dufrasne. IBM, International Technical Support. Front cover IBM System Storage DS Architecture and Implementation High Density Storage Enclosure 8 Gbps Host Adapters 4-Port Device Adapter. Front cover IBM System Storage DS Architecture and Implementation Learn the DS and DS new and common features Plan, install, and.

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Loading the code bundle. The first array sites in each DA pair that are assigned to arrays will contribute one or two spares depending on the RAID optionuntil the DA pair has access to at least four spares, with two spares being placed on each loop.

You should keep this in mind with respect to load balancing between processor complexes. The remaining drive on the array site is used as a spare. These two servers share the load of receiving and moving data between the attached hosts and the disk arrays.

The second expansion frame can contain up to 20 storage enclosures installed in pairswhich contain the disk drives. Such trademarks may also be registered or common law trademarks in other countries. It copies data speculatively into the cache before it is even requested.

Storage virtualization offered by the DS series allows organizations to allocate system resources more effectively and better control application quality of service. Each disk is attached to both switches. This model is available as either a dual 2-way processor complex with enclosures for DDMs and 16 FC host adapter cards, or a dual 4-way processor complex with enclosures for DDMs and 16 FC host adapter cards.

However, on closer inspection, the frames themselves are almost identical. RAID 1 provides disk mirroring, which duplicates data between two disk drives. Whenever the device adapter connects to a disk, it uses a switched connection to transfer data.

Dynamic deallocation of potentially failing components is nondisruptive, allowing the system to continue to run. The expansion frame model is called 95E. The intention is to only have four spares per DA pair.


IBM System Storage DS8000: Architecture and Implementation

Adding more drives will not add DA pairs. The DS storage system can be ordered with an outstanding four-year warranty, an industry first, on both hardware and software. Non-critical environmental events are also logged and reported. RPC cards are only present in the base frame.

Architecture and Implementation Fibre Channel supported servers The current list of servers supported by Fibre Channel attachment can be found at this site: If you install the DS so that both primary power supplies are implementaion to the same circuit breaker or the same switchboard, then the DS will not be well-protected from external power failures.

Send us your comments about this book or other IBM Redbooks publications in one of the following ways: For example, you could define a one cylinder CKD volume, but cylinders 1 extent will be allocated and cylinders would be wasted. This storgae is a hardware function on the memory controller chip and does not influence normal system memory performance. The PPS supplies V output power to four or six power distribution units PDUs depending on the rack type base, first expansion, second expansion.

Architecture and Implementation 3. Thus the contents of NVS memory modified data not yet destaged to disk from cache have enough time to be written to a number of disk drives internal to the processor complexes not the storage DDMs. Use these capabilities to separate and protect volumes in a copy services relationship from each other.

For additional information about SSD configurations, see Chapter 8. However, on closer inspection, the frames themselves are almost identical.

IBM System Storage DS Architecture and Implementation Front cover

The Full Disk Encryption support feature is available only as a stoorage order. If the error can be recovered, or after suitable maintenance, the service processor resets the FIRs so that they can accurately record any future errors. Such trademarks may also be registered or common law trademarks in other countries. Users of this document should verify the applicable data for their specific environment.


The LEDs can be seen when the front door of the frame is closed. Batteries will be added to expansion frames that did not already have them. Kernel components and extensions can provide failure recovery routines to gather serviceability data, diagnose, repair, and recover from errors. Figure shows the fabric design of the DS These changes use the many strengths of the PCI Express architecture. Additional information is available in 3.

Architecture and Implementation balanced across a set of up to 16 readers. To make the architecgure clearer, only 16 DDMs are shown, eight in each disk enclosure. It is designed as a high performance, self-healing interconnect. In other models of the DS family, a Central Electronics Complex was also referred to as a processor complex or a storage server. A floating spare is defined as follows: The materials storagge those websites are not part of the materials for this IBM product and use of those websites is at your own risk.

This ensures that all data in nonvolatile storage, known as modified data, is destaged properly to disk prior to power down.

If line power were to fail, where both primary power supplies PPS sotrage the primary frame were to report a loss of AC input power, then the DS must take action to protect that data. With Dynamic PAV, the assignment of addresses to volumes can be automatically managed to help the workload meet its performance objectives and reduce overall queuing. Inside the disk enclosures are cooling fans located in the storage enclosure power supply units.

Up to four standby CoD disk drive sets 64 disk drives can be concurrently field-installed into your system.