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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Dynamic Path Selection DPS allows the channel subsystem to select any available non-busy path to initiate an operation to the disk subsystem. There are a minimum of four spares per DA pair.
sgstem Many thanks to the following people who helped with equipment provisioning and preparation: Architecture and Implementation 1. For more information about SSDs, see Chapter 8.
IBM System Storage DS Architecture and Implementation Front cover
Architecture and Implementation 2 Chapter 2. The same is true for the host architecthre adapter HBA in the attached host, making it a single point of failure as well. Thus, the normal flow of data for a write when both CECs are operational is as follows: Within each Extent Pool, we create logical volumes. After failover, the DS now operates as shown in Figure on page Figure Ethernet switch ports Dz8000 4. The cable connector required to attach to this adapter is an LC type.
The same data is also striped across the other storaye of the array, creating a mirror. The server then reports the write as complete before it is written to disk. The base frame contains two processor complexes CECs.
Providing a graphical representation of hot data distribution at the volume level, this powerful tool allows you to analyze the workload characteristics and evaluate the benefits of the higher performance possible with the Solid State Drives technology. Combined with the sotrage business resiliency and encryption features, both machines provide a unique combination of high availability, performance, and security.
Up to four standby CoD disk drive sets 64 disk drives can be concurrently field-installed into storae system. Fibre Channel distances There are two types of host adapter cards that you can select: He is also a VMware Certified Professional.
Dual platform key server support allows two server platforms to host the key manager with either platform operating in either clear key or secure key mode.
Because expansion is done in this linear fashion, the addition of more enclosures is completely nondisruptive. DS does not support model conversion.
The second and third expansion frames have drives only. Standard cabling is optimized for performance and highly scalable configurations, allowing large long-term growth. SARC is an efficient adaptive algorithm for managing read caches with both of the following types of data: The Standby Capacity on Demand CoD offering is designed to provide you with the ability to tap into additional storage.
In general, redundancy is lost for a short period as each component in a redundant pair is updated. You can also reference 8. Discover Prime Book Box for Kids. If the error rates exceed predetermined threshold values, the drive will be nominated for replacement. Logical paths are established for each system image.
Architecture and Implementation System z In the System z environment, normal practice is to provide multiple paths from each host to a disk subsystem. Vervante May 13, Language: This feature has been improved after release 6. The FC trunking connection provides full 8-Gbps transfer rates from a group of drives with lower interface speeds.
The sstorage assigned to the memory are common across all processors in the same complex.
Figure displays a front view of a DS Model with the covers off. The logo program provides conformance and interoperability test specifications based on open standards to support IPv6 deployment globally. Hardware components and architecture 59 Figure illustrates the preferred HA plug order for DS Each Fibre Channel port supports a maximum of host login IDs and 1, paths.
It shows the placement of the hardware components within the frames. Overconfiguration of spares The DDM sparing policies support the overconfiguration of spares.
DS capacity upgrades and CoD. The Install Sequence line indicates the order in which host adapter pairs are to be installed. Any functionally equivalent product, program, or service that does not infringe any IBM intellectual property right may be used instead.
Architecture and Implementation Figure shows the DS with the 4-way feature. Hardware components and architecture 71 For DS, the disk enclosures have two power supply units PSUs for each disk enclosure.
POWER6 cache availability In the event that an uncorrectable error occurs in L2 or L3 cache, the system will be able to dynamically remove the offending line of cache without requiring a reboot.
However, if a complete discharge of the batteries has occurred, which can happen if multiple power outages occur in a short period of time, then recharging might take up to two hours. This creates a switched Fibre Channel network to the installed disks.
Amazon Renewed Refurbished products with a warranty. One thing to sysstem in mind is that Storage Pool Striping is static, whereas Easy Tier is dynamic, which can allow dynamic interaction for better performance when it comes to pool allocation. The DS with standard cabling allows for up to three frames and up to sixteen 8-port host adapters, or up to sixteen 4-port host adaptors, providing a high performance and scalable storage environment.
It copies data speculatively into the cache before it is even requested. DS does not support model conversion, that is, business class and standard class cabling conversions are not supported. The components are described in this section.