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 left side of each expansion frame, viewed from the front of the machine, is the frame power area.

implemenntation Just like the failover process, the failback process is transparent to the attached hosts. The write operation is reported to the attached host as completed.

DS architecture

Six DA pairs and disk drives Two expansion units: This configuration option is intended for configurations where capacity and high resource utilization is of the most importance.

This enables the FSP to take appropriate action. The DS base frame supports up to drives, with the first expansion frame supporting up to drives, the second expansion frame supporting up to 1, drives, and the third expansion supporting up to drives, in the size of 2.

The minimum capacity is achieved by installing one drive group 16 drives of GB 15K enterprise drives. Write a customer review. The Standby Capacity on Demand CoD offering is designed to provide you with the ability to tap into additional storage and is particularly attractive if you have rapid or unpredictable storage growth.

For information regarding the effective capacity of these configurations, see Table on page Thus, when a drive fails in one ans the RAID 0 arrays, we can rebuild the failed drive by reading the data from the equivalent drive in the other RAID 0 array.

This option helps improve the storage density for disk drive modules DDMs as compared to previous enclosures. These additional DDMs added must be of the same capacity and speed as the 16 DDMs already residing in the enclosure pair. DS requires an isolated key server in encryption configurations.

There are cooling fans located in each PSU. This information is based on using the Standard Cabling design, not the Business Cabling.


IBM System Storage DS8000 Architecture and Implementation Front cover

The HMC is a dedicated workstation that is physically located inside the DS and can proactively monitor the state of your system, notifying you and IBM when service is required. Disk enclosure power supply DS The disk enclosure power supply unit provides 5V and 12V power for the DDMs, and houses the cooling fans for the disk enclosure.

The DS uses this smart floating technique so that the larger or higher RPM DDMs are allocated as spares, which guarantees that a spare can provide at least the same capacity and performance as the replaced drive. The second expansion frame can contain up to 20 storage enclosures installed in pairswhich contain the disk drives.

IBM System Storage DS Architecture and Implementation | IBM Redbooks

External Client network connection anf the DS system is through a separate patch panel connection. To better understand AAL, see Figure Architecture and Implementation Adaptive Multi-stream Prefetching Adaptive Multi-stream Prefetching AMP is a breakthrough caching technology storave improves performance for common sequential and batch processing workloads on the DS It leads to higher throughput rates.

Data is written to cache memory in the owning CEC. Linux is a trademark of Linus Torvalds in the United States, other countries, sttorage both.

The logo program provides conformance and interoperability test specifications based on open standards to support IPv6 deployment globally. AMP optimizes cache efficiency by incorporating an autonomic, workload-responsive, and self-optimizing prefetching technology. This feature allows single sign-on functionality, and can simplify user management by allowing both the DS and DS to rely on a centralized LDAP directory rather than a local user repository.

Call home on error machine-detected Connection for a few days client-initiated Remote error investigation service-initiated Chapter 1. The DDMs can be 2.

Each 8 Gbps port independently auto-negotiates to either 2, 4, or 8 Gbps link speed. Each DA can support two switched FC networks. This feature has been improved after release 6. The components are described in this section. For the DS, that maximum has been increased to 6 GB per server. Due to the switch-based architecture of the DS, this effect will be minimal. If the failure was relatively minor and recoverable by the operating system or DS microcode, then the resume action will be initiated by the software.


Standard cabling is optimized for performance and highly scalable configurations, allowing large long-term growth. After the spare drive has replaced a failed one in a redundant array, the recalculation of the entire contents of the new drive is performed by reading the corresponding data and parity in each stripe from the remaining drives in the array and then writing this data to the spare drive.

Consult your local IBM representative for information on the products and services currently available in your area. A business class cabling configuration can be ordered only as a base frame with no expansion frames. Up to three expansion frames can be attached to a model There is a new air flow system that allows optimal horizontal cool down of the system. The 95E scales with 3. One DA pair creates two switched loops: It enables a full or incremental point-in-time copy to be created at a local site, and then uses remote mirroring commands to copy the data to the remote site.

Preface xvii Thanks to the following people for their contributions to this project: It is not possible to shut down or power off the DS from the operator panel, except in an emergency and by using the EPO switch. IBM may use or distribute any of the information you supply in any way it believes appropriate without incurring any obligation to you. Metro Mirror Consistency Groups, when used with a supporting application, can be used to maintain data and transaction consistency across multiple LUNs or volumes, or even multiple DS systems.

Temperature monitoring is also performed. The card itself is PCIe Gen 2. These functions are part of the System z architecture and are managed by the channel subsystem on the host and the DS This feature allows the creation of over-provisioned devices for more efficient usage of the storage capacity. These functions provide storage mirroring and copying over large distances for disaster recovery or availability purposes.