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.
|Published (Last):||13 April 2008|
|PDF File Size:||2.56 Mb|
|ePub File Size:||10.25 Mb|
|Price:||Free* [*Free Regsitration Required]|
The same data is also striped across the other half of the array, creating a mirror. This option helps improve the storage density for disk drive modules DDMs as compared to previous enclosures.
IBM System Storage DS Architecture and Implementation | IBM Redbooks
This section looks at the RAS features of the CECs, including the hardware, the operating system, and the interconnections. The isolated key server currently defined is an IBM System x server. To make the diagram clearer, only 16 DDMs are shown, eight in each disk enclosure. Figure archjtecture a front view of a DS Model with the covers off. This provides much faster write performance.
DS is designed for hot and cold aisle data center design, drawing air for cooling from archktecture front of the system and exhausting hot air at the rear. Architecture and Implementation System z In the System z environment, normal practice is to provide multiple paths from each host to a disk subsystem. Reserved memory partitions allow you to set aside a portion of memory to use as cache and a portion to use as NVS.
The remaining drive on the array site is used as a spare. With a 4-way configuration, the DS offers up to GB of processor memory. It enables a full or incremental point-in-time copy to be created at a local site, and then uses remote mirroring commands to ib, the data to the remote site. This configuration is true whether it is a 2-way or 4-way architecyure, and whether or not the system has the Extended Power Line Disturbance ePLD feature.
The disk enclosure pair consists of two enclosures, one on top of the other. Retrying the instruction will not help tsorage this situation because the instruction will continue to fail.
It provides readers with more insight into individual components and the architecture that holds them together. These switches are built into the disk enclosure controller cards.
IBM System Storage DS8000: Architecture and Implementation
Discover Prime Book Box for Kids. Although the GB and GB SSDs can be ordered in full sets 16 drives or half sets 8 drivesthe optimum price to performance ratio is achieved by using full drive sets This enhancement provides more efficient use of the site-to-site network capacity a higher single volume throughput capability and an environment that can effectively use Parallel Access Volumes PAVs.
It significantly improves the configuration flexibility, the performance tuning, and planning. The array consists of six data drives and two parity drives. The SSPC can enable a greater degree of simplification for organizations confronted with the growing number of element managers in their environment.
The backplane is the electronic and physical backbone of the disk enclosure. The benefits of FlashCopy are that the point-in-time target copy is immediately available for use for backups or testing, and that the source volume is immediately released so that applications can continue processing with minimal application downtime.
Hardware components and architecture 73 3. These functions are part of the System z architecture and are managed by the channel subsystem on the host and the DS It means that all data travels through the shortest possible path. It is a plant-only feature, meaning that it can only be installed on new machines. Architecture and Implementation With the introduction of small form factor SFF disk enclosures on DS, certain changes have been made to the PPS to support the disk enclosure power requirements.
It copies data speculatively into the cache before it is even requested.
IBM System Storage DS Architecture and Implementation Front cover
The second expansion frame can contain up to disk drives. CUIR also allows the DS to request that all attached system images set all paths required for a particular service action to the offline state.
It is a common cause of unplanned outages. These examples have not been thoroughly tested under all conditions. Like other modern caches, DS and DS contain volatile memory used as a read and write cache and non-volatile memory used as a write cache. 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.
To better understand AAL, see Figure He also holds multiple vendor certifications from HP, Cisco, and Sun. Switched FC-AL technology includes the following key features: For example, if a DS had six disk enclosures total, it would have three at the front and three at the rear.
Up to four standby CoD disk drive sets 64 disk drives can be concurrently field-installed into your system. It must then be able to take it offline, fix or isolate it, imolementation then reintroduce the fixed or replaced component into service without any application disruption.
IBM System Storage DS8000 Architecture and Implementation Front cover
The two threads running on the single processor share a common L1 cache. However, it is the user’s responsibility to evaluate and verify the operation of any non-IBM product, program, or service. The expansion frame 95E can only be attached to the 4-way base frame. SDD is not available for every supported operating system. The second and third expansion frames have drives implememtation.