Combining excellent development with leading 6 gigabits per second Gbps host interface and drive technology. Build-your-own offerings allow you to configure a system that meets your needs. Simply choose a model and then add options. Single entity offerings are generally for customers purchasing in bulk.

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Scalability to mid-range performance and features starting at entry-level prices Efficiency to help reduce annual energy expenditures and environmental footprints Simplicity that does not sacrifice control with the perfect combination of robustness and ease of use.

The DS is available in two models. EXP is a drive enclosure and EXP is a drive enclosure that can be attached to either of the storage subsystems. Offering substantial improvements at a price that fits most budgets, the DS delivers superior price-to-performance ratios, functionality, scalability and ease of use for the entry-level storage user. It provides backwards compatibility with 1Gb iSCSI environments, protecting your current investment while transitioning to the network of the future.

It also maintains simplicity by using a standard RJ45 connection without the need of additional SFPs. The DS is available with single or dual controllers, with the option to further enhance the performance of your dual controller system with the Turbo Performance option.

You choose the configuration to match your current performance requirements and budget, and IBM offers a way to protect your investment with an upgrade path to later add the options that you need. The next-generation 6 Gbps SAS systems deliver midrange performance and scalability at entry-level prices. Full disk encryption with local key management provides relentless data security. Drive and expansion enclosure intermix cost-effectively to meet all application, rack, and energy-efficiency requirements.

The capacity of a DS system can be increased to up to disk drives with the attachment of EXP expansion units. It is also available in two models:. All models support dual-port, high-performance, high-capacity nearline and self-encrypting drives. Both of the expansion enclosures can be intermixed behind a DS RAID levels 0, 1, 3, 5, 6, Storage partitions Support for up to storage partitions levels: four standard with upgrades to 8, 16, 32, 64, Fans and power supplies Dual redundant, hot-swappable Power and cooling module houses power supplies, redundant cooling fans.

Rack support 2U, inch, industry-standard rack. Other DC-powered models available in enclosures for twenty-four 2. Drive interface — 6 Gb SAS. Altitude ranges Operating: ft Operating current: Scalability up to drives optional mix of expansion enclosures. Fans and power supplies Dual. Rack support Yes, standard. Size 2U rack-optimized. Operating altitude: ft Energy consumption efficiency 80 PLUS efficiency standard.

Next-generation SAS expansion enclosures Affordable entry point with midrange performance and reliability. Scalable up to drives with a mix of EXP and EXP enclosures Start small and grow your configuration as storage demands change.

A choice of EXP and EXP allow for flexibility to choose the optimal enclosure based on organizational requirements.

EXP can offer the highest flexibility with support for a full range of requirements: high capacity and low cost to high-performance critical applications. Supports high-performance SAS, capacity-optimized SAS drives, and SEDs Multiple drive support can increase efficiencies, which provides large consolidation and virtualization projects while keeping costs low.

Support of self-encrypting drives enables relentless data protection. Redundant and hot-swappable ESMs, power supplies, and drives Key component of a highly available and reliable storage configuration. Power supplies designed to meet multiple power efficiency standards Power efficiencies meet green initiatives and reduce overall energy expenditures. Options and feature codes.

Table 5 lists the option numbers and the feature codes of the various cables that can be ordered with the DS Table 6 lists option numbers and the feature codes of the various upgrade options that can be ordered with the DS Table 7 lists option numbers and the feature codes of the various disk drives that can be ordered with the DS The same part numbers also apply to the EXP Expansion units.

The DS controller has several connection ports for different purposes Figure 6. Note: Only one type of optional interface can be added to any one DS storage server. Mixing host interface cards between controllers in the same DS is not supported.

Each DS and EXP enclosure comes with two high-efficiency, removable, watt power supplies Figure 8 as standard. Each power supply has two internal fans for cooling the enclosure. The four fans pull air through the drives from front to back across the drives. In this section, we discuss essential characteristics of fiber cables and connectors. This information can help you understand the options that you have for connecting and cabling the DS Storage System.

MMF allows light to disperse in the fiber so that it takes many paths, bouncing off the edge of the fiber repeatedly to finally get to the other end multi-mode means multiple paths for the light. The light taking these various paths gets to the other end of the cable at slightly separate times separate paths, separate distances, and separate times. The receiver has to determine which in-coming signals go together.

This behavior can be explained although not simply through the laws of optics and physics. Table 8 lists the supported distances. Figure 9 shows the two available options. Through this software, it is possible to perform administrative tasks such as creating arrays, logical drives, assigning logical drives to the host servers, setting up FlashCopy and Volume Copy, capturing logs for troubleshooting, and so on.

The Turbo Key is an optional premium feature that, when enabled, boosts the performance of a storage system across both throughput and IOP workloads, allowing you to take full advantage of DS performance capabilities with bandwidth-intensive applications.

The DS Turbo Key offers: Scalability to midrange performance and features starting at entry-level prices Efficiencies to help reduce annual energy expenditures and environmental footprint Simplicity that does not sacrifice control with the perfect combination of robustness and ease of use. Storage partitioning adds a high level of flexibility to the DS Storage System. The DS comes with four partitions by default, which can be expanded to a maximum of It enables you to connect multiple and heterogeneous host systems to the same storage server, in either stand-alone or clustered mode.

The term storage partitioning is somewhat misleading because it actually represents a host or a group of hosts and the logical drives that they access. Without storage partitioning, the logical drives configured on a DS Storage System can only be accessed by a single host system or by a single cluster, which can lead to inefficient use of storage server hardware unless the use of the DS Storage System is dedicated to a single host for example, SVC or v attachment.

FlashCopy creates a capacity-efficient, point-in-time copy of a physical volume for data protection uses, such as file restoration and backup. A FlashCopy volume is the logical equivalent of the physical volume, but is created more quickly than a physical copy and with minimal disruption to applications and production processes. Using copy-on-write technology, FlashCopy volumes preserve data in its original form even as data in the physical source volume is changed.

FlashCopy volumes appear and function as standard storage volumes, and restoration of a FlashCopy volume is quick and easy. With the new FlashCopy Scheduler, its now possible to schedule FlashCopy images via the user interface.

This can be applied to new and existing snapshot volumes. Figure 12 and Figure 13 show the new menu item from the GUI interface. The Volume Copy premium feature creates a physical copy of a volume.

Volume Copy is used with FlashCopy to create a physical copy of your data with minimal disruption to applications and production processes. Upon completion of the Volume Copy process, the new volume can be mapped to any host, and it functions as a standard volume. Volume Copy can also be used to redistribute data within the DS, moving volumes to a different disk drive technology or RAID level.

A copy can be initiated while the source volume remains available for writes. Figure 14 shows Volume Copy in action. This monitoring tool is very important for performance analysis of a managed storage subsystem. It allows administrator to make informed decisions about storage system adjustments, such as free space usage, locating stranded storage, and efficient provisioning.

Figure 15 shows the graphical performance monitor feature in the GUI. The SAS SED drives are required to enable disk security and can perform symmetric encryption and decryption of data at full disk speed with no impact on performance.

It uses asymmetric encryption to encrypt and decrypt the data key. Remote mirroring provides storage-system-based data replication from one DS system to another DS system over Fibre Channel communications links. Remote Mirroring supports synchronous or asynchronous data transfers, enabling you to choose the replication method that best meets your protection, distance, or performance requirements: Synchronous mirroring is designed to provide continuous mirroring between primary and remote volumes to help ensure absolute synchronization.

Asynchronous mirroring queues remote writes to reduce the latency, thus enabling long-distance replication while increasing local system performance. Asynchronous mirroring includes a write consistency option designed to ensure that writes to the remote system complete in the same order as the local system.

The problem reporting utility provided by RSM for Storage automatically creates an entry in the IBM call management system for each subsystem that reports a problem. This is the equivalent of placing a voice call to IBM Service for a problem.

Once in the system, problems are responded to with the priority specified by the maintenance agreement in place for the product. This section describes the requirements and best practice guidelines for connecting EXP enclosures to a DS storage subsystem. This configuration is a fully functional configuration, but there is no redundancy on the drive-side connections. This configuration provides redundancy on the drive-side connections.

There are examples for both single and dual controller DS storage subsystems. General rule: Although some of the examples shown next are valid supported configurations, there are some with no redundancy of host-side connections. Always use redundant host-side connections instead. You can attach up to four direct-connected hosts or up to 64 host servers in a switched fabric SAN infrastructure.

This section describes sample configurations of direct-attached Fibre Channel host servers. Every DS is covered by the below warranty: System including the cache backup battery module : three years Optional features: three years, unless specified otherwise. Optional IBM features initially installed in an IBM system carry the same warranty and warranty service support category as the system.


IBM System Storage DS3512 Express Dual Controller Storage System

SMBs looking for low cost network storage arrays often have to make compromises as SATA hard disks have traditionally been their only option. You have a choice of two head units with the DS reviewed here supporting a dozen 3. The DS is also a 2U appliance but this can handle up to twenty-four 2. The DS can be fitted with a wide variety of disks. They do away with the need for a SATA to SAS interposer thereby reducing manufacturing costs plus potential points of failures and they have the same level of host queuing support as standard SAS drives. The controllers have an extensive range of data port options. The DS on review came with the FC host card.


IBM System Storage DS3512 Express review

The DS delivers affordable, entry-level configurations for small and medium businesses in compact 2U, inch rack mount enclosures, with the flexibility to scale in capacity, performance, host interfaces, and functions as your business grows or requirements change. This model is configured with one environmental services module ESM. This model is configured with two environmental services modules ESM. The DS is available with single or dual controllers, with the option to further enhance the performance of your dual controller system with the Turbo Performance option. You choose the configuration to match your current performance requirements and budget, and IBM offers a way to protect your investment with an upgrade path to later add the options you need. The DS flexibility and options also extends to the disk drives. Disk drives of the same form factor can be intermixed within the appropriate DS or EXP enclosure.


IBM System Storage DS3512


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