IBM System Storage DS Architecture and Implementation. Storage facility Configuring the DS storage for FB volumes. Front cover. IBM System Storage. DS Architecture and Implementation. Bertrand Dufrasne. Andreas Baer. Peter Klee. Danijel Paulin. This IBM® Redbooks® publication describes the concepts, architecture, and implementation of the IBM System Storage™ DS series of disk storage.

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The data and parity bits float between the 7 or 8 drives to provide optimum write performance. We cover the following topics: Any subsequent failure during the reconstruction within the same array second drive failure, second coincident medium errors, or a drive failure and a medium error can be recovered without loss of data.

Would you like to tell us about a lower price? It allows for the creation of large storage area networks SANs. All memory installed on any processor complex is accessible to all processors in that complex. It provides readers with more insight into individual components and the architecture that holds them together. The DS can support a total of drives in a smaller footprint three frames than previous generations, supporting higher density and helping to preserve valuable raised floor space in data center environments.

Tools and service offerings. This configuration option is intended for configurations where capacity and high resource utilization is of imppementation most importance.

However, there have been some updates that allow more control in the performance area. Because the DS now has only one copy of that data active in the cache memory of CEC1it will perform the following steps: All expansion frames contain the power and arcgitecture components needed to run the frame.

Temperature monitoring also warns the internal microcode of potential environment-related problems. This monitoring capability enables workload data collection to be off-loaded and further processed with the Storage Tiering Advisor Tool.


The DS can have up to 16 of these adapters installed in pairs. Archiitecture predecessor IBM systems, this error would have caused a checkstop. A 2-way configuration requires two battery packs.

IBM System Storage DS8000 Architecture and Implementation Front cover

On the left side is one processor complex CEC. This enables the service processor to take appropriate action when it detects that the firmware or the operating system has lost control. Power and cooling components power supplies, batteries, and fans Power control cards: The furnishing of this document does not give you any license to these patents.

The ePLD feature is useful as an additional safeguard against environmental power fluctuations. Each PPS has internal fans to supply cooling for that power supply. This feature aligns distinct service levels to separate workloads in the system to help maintain the efficient performance of each DS volume.

IBM System Storage DS Architecture and Implementation | IBM Redbooks

Configuration flexibility and overall implemsntation cost-performance can greatly benefit from the exploitation of this feature. This model is available as either a dual 2-way processor complex with storage enclosures for up to DDMs and 4 FC host adapter cards, or as a dual 4-way processor complex with storage enclosures for up to DDMs and 8 FC host adapter cards.

Where there is a significant difference, we describe the two systems separately. It can be used to rebuild a RAID 5 array when certain disk errors occur and a normal determination is made that it is time to bring in a spare to replace a failing disk drive. Consult your local IBM representative for information on the products and services currently available in your area.

If desired, they can be integrated in an LDAP infrastructure. How to get IBM Redbooks publications. The green indicator shows ready status and disk activity when blinking, the amber indicator is used with light path diagnostics to allow for easy identification and replacement of a failed DDM.

His areas of experience also include critical situation management for storage environments.


When a subsequent FlashCopy is initiated, only the data required to make the target current with the source’s newly established point-in-time is copied. The DS is available in either of the following configurations: The isolated key server currently defined is an IBM System x server. Data is held in cache as long as possible using this smart caching algorithm.

With the advanced Copy Services functions the DS series integrates, data availability can be enhanced even further. Expansion frame four can only contain up to four disk enclosure pairs, for a maximum total of disk drives in this frame.

This scrubbing process applies to both array members and spare DDMs. Architecture and Implementation Nondisruptive upgrade path: With Dynamic PAV, the assignment of addresses to volumes can be automatically managed to help the workload meet its performance objectives impleentation reduce overall queuing.

The rebuild is performed by reading architecthre corresponding data and parity in each stripe from the remaining drives in the array, performing an exclusive-OR operation to recreate the data, and then writing this data to the spare drive. At any time, you can logically configure your CoD drives, concurrently with production, and you are automatically charged stkrage the additional capacity.

The minimum capacity is achieved by installing one half drive group of eight 73 GB SSD drives note that the 73 GB drives have now been withdrawn from marketing. The write operation is reported to the attached host as completed. Creating logical volumes on the DS works through the following constructs: Amazon Rapids Fun stories for kids on the go. Systtem includes hints and tips derived from user experiences for efficient installation and use.