IBM FlashSystem 840 Bedienungsanleitung

IBM FlashSystem 840 Product Guide 1

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IBM FlashSystem 840 Product Guide

IBM Redbooks Product Guide

This IBM®Redbooks®Product Guide describes IBM FlashSystem™840. Today's global organizations

depend upon the ability to unlock business insights from massive volumes of data, and they need to be

able to do it faster than the competition. Flash technology has changed the economics of today's data

center by eliminating storage bottlenecks. Flash technology has redefined the performance, efficiency,

and reliability of data-intensive applications. In fact, IBM flash storage offerings provide extreme

input/output operations per second (IOPS) performance in a power-efficient footprint.

FlashSystem 840 is optimized for the data center to enable organizations of all sizes to strategically

harness the value of stored data. IBM FlashSystem 840 delivers a competitive advantage for the modern

organizations and enterprises. It provides flexible capacity and extreme performance for the most

demanding applications, including virtualized or bare-metal online transaction processing (OLTP) and

online analytical processing (OLAP) databases, virtual desktop infrastructures (VDI), technical computing

applications, and cloud environments. The system accelerates response times with IBM MicroLatency™

access times as low as 90 µs write latency and 135 µs read latency to enable faster decision making.

The introduction of a low capacity 1 TB flash module allows FlashSystem 840 to be configured in capacity

points as low as 2 TB in protected RAID 5 mode. Coupled with 10 GB iSCSI, FlashSystem is positioned to

bring extreme performance to small and medium sized businesses (SMB) and growth markets. Figure 1

shows FlashSystem 840.

Figure 1. FlashSystem 840

Did you know?

FlashSystem 840 is configurable with 2 - 48 TB of usable capacity for increased flexibility.

FlashSystem 840 provides four flexible interface types including Fibre Channel, Fibre Channel overz

Ethernet (FCoE), iSCSI, and InfiniBand to easily integrate into existing SAN environments.

FlashSystem 840 is cloud-optimized with support for 10 Gbit iSCSI interfaces, allowing private cloud

environments and Managed Service Providers (MSPs) to take advantage of high-performance

storage inside existing Ethernet-based infrastructures.

All active parts are hot-swappable, including the flash modules.

IBM FlashSystem 840 Product Guide 2

Key features

FlashSystem 840 provides extreme performance, enterprise-class reliability, energy efficiency, and

optional data-at-rest encryption.

Scalability and performance

FlashSystem 840 has the following scalability and performance features:

IBM MicroLatency provides latency that is measured in microseconds

High aggregate performance (bandwidth) and IOPS (I/Os per second)

Two hot-swappable canisters, providing connectivity to the host

Flexible interface types of Fibre Channel, Fibre Channel over Ethernet (FCoE), iSCSI and InfiniBand

Up to 16 ports of 8 Gbps or eight ports of 16 Gbps Fibre Channel

Up to 16 ports of 10 Gbps FCoE

Up to 16 ports of 10 Gbps iSCSI

Up to eight ports of 40 Gbps quad data rate (QDR) InfiniBand

Slots for up to 12 hot-swappable flash storage modules (1 TB, 2 TB or 4 TB modules)

Configurable 2 - 48 TB of capacity for increased flexibility

Reliability, availability, and serviceability

FlashSystem 840 storage products deliver the following enterprise-class reliability features:

Concurrent code load enables customer applications to remain online during firmware upgrades to all

components, including the flash modules.

Hot-swappable flash modules by way of tool-less front panel access. If a flash module failure occurs,

critical customer applications can remain online while the defective module is replaced.

Redundant hot-swappable components. RAID controllers, management modules, interface cards (all

contained in the canister), batteries, fans, and power supplies are all redundant and hot-swappable.

All components are easily accessible through the front or rear of the enclosure, so IBM FlashSystem

840 does not need to be moved in the rack and no top access panels or cables need to be extended.

RAID 0 and RAID 5 configurations for reliability that suits varying client needs.

System-wide RAID 5 with easily accessed front-loadable hot-swappable flash modules to help

prevent data loss and improve availability.

IBM Variable Stripe RAID™ (VSR), which is a patented IBM technology that provides an intra-module

RAID stripe on each flash module.

Two-dimensional (2D) Flash RAID, which consists of IBM Variable Stripe RAID and system-wide

RAID 5. Variable Stripe RAID technology helps reduce downtime and maintain performance and

capacity in the event of partial or full flash chip failures. System-wide RAID 5, with easily accessed hot

swappable flash modules, helps prevent data loss and promote availability.

Flash Cell leveling, which is a technology that reduces flash cell wear because of electrical

programming.

Energy and space efficiency

FlashSystem 840 has the following features:

Nominal 625 W power consumption (for a 70/30 read/write workload on an eight module, 2 TB

FlashSystem), and uses two standard, single-phase (100 v - 240 v) electrical outlets.

Space-efficient 2U form factor that is ideally suited for today's data centers.

IBM FlashSystem 840 Product Guide 3

Manageability and security

FlashSystem 840 offers the following manageability and security features:

Advanced security for data at rest with hardware-accelerated AES-XTS 256 bit encryption

Graphical user interface (GUI) and command-line interface (CLI) based on IBM SAN Volume

Controller, which is available in any supported browser

SAN Volume Controller CLI

Simple Network Management Protocol (SNMP)

Email alerts

Syslog redirect to send system log messages to another host

Architecture and key components

IBM FlashSystem 840 enclosures consist of two fully redundant canisters. Each canister contains a RAID

controller, two interface cards, and a management controller with an associated 1 Gbps Ethernet port.

Each canister also has a USB port and two hot-swappable fan modules. Figure 3 shows a rear view of

FlashSystem 840, which contains one canister.

In addition to the canisters, IBM FlashSystem 840 enclosures include two battery modules and two power

supplies, which are all redundant and hot-swappable. All components are easily accessible by way of the

front or rear of the unit, so IBM FlashSystem 840 does not need to be moved in the rack, and any top

access panels or cables do not need to be extended. This makes servicing the unit easy.

The front of the enclosure has the two battery modules on the far left of the enclosure and twelve flash

module slots to the right of the battery modules, as shown in Figure 2.

Figure 2. Front view of FlashSystem 840

IBM FlashSystem 840 Product Guide 4

Figure 3 shows the components of IBM FlashSystem 840 from the rear. One of the two canisters is

removed, and you see two interface cards and two fan modules. The power supply unit to the right of the

fans provides redundant power to the system. All components are concurrently maintainable except for

the midplane, enclosure LED board, and power interposer board. All external connections are from the

rear of the system.

Figure 3. Rear view of FlashSystem 840 with one canister removed

FlashSystem 840 contains two canisters. Each canister contains a RAID controller, two interface cards,

and a management controller with an associated Ethernet port and a USB connector.

Figure 4 shows a rear view of FlashSystem 840 with Fibre Channel (FC) or Fibre Channel over Ethernet

(FCoE) interfaces. The canisters are to the left (large units) and the two power supply units are to the right

(small units).

Figure 4. Rear view with Fibre Channel interface cards

IBM FlashSystem 840 Product Guide 5

Specifications

Table 1 lists the specifications for FlashSystem 840.

Table 1. Specifications (part 1 of 2)

Specification Description

Model 9840-AE1, 9843-AE1.

Form factor 2U rack-mounted enclosure.

Flash module quantity Up to 12 flash modules in increments of 2, 4, 6, 8, 10, or 12. These

modules can be either 1 TB, 2 TB, or 4 TB and cannot be intermixed.

Flash type Enterprise multilevel cell (eMLC).

Raw capacity (TB/TiB) 2.75 TB/2.5 TiB, 5.5 TB/5 TiB, 8.25 TB/7.5 TiB, 11 TB/10 TiB, 16.5

TB/15 TiB, 22 TB/20 TiB, 27.5 TB/25 TiB, 33 TB/30 TiB, 44 TB/40 TiB,

55 TB/50 TiB, 66 TB/60 TiB.

RAID 0 usable capacity

(TB/TiB)

2 TB/1.88 TiB, 4 TB/3.75 TiB, 6 TB/5.63 TiB, 8 TB/7.5 TiB, 10 TB/9.34

TiB, 12 TB/11.25 TiB, 16 TB/15 TiB, 20 TB/ 18.75 TiB, 24 TB/22.25

TiB, 32 TB/30 TiB, 40 TB/37.5 TiB and 48 TB/45 TiB.

RAID 5 usable capacity

(TB/TiB)

2 TB/1.88 TiB, 4 TB/3.75 TiB, 6 TB/5.63 TiB, 8 TB/7.5 TiB, 10 TB/9.34

TiB, 12 TB/11.25 TiB, 16 TB/15 TiB, 20 TB/ 18.75 TiB, 24 TB/22.25

TiB, 32 TB/30 TiB, and 40 TB/37.5 TiB.

Maximum capacity For RAID 0, the maximum capacity is 48 TB.

For RAID 5, the maximum capacity is 40 TB.

Flash module protection ECC error correction, Variable stripe RAID data protection,

overprovisioning, and IBM two-dimensional Flash RAID.

RAID support RAID 0 and RAID 5.

Host interfaces Two RJ45 Ethernet connections for management and up to 16 host

interface connections, which are either SFP+ FC or QSFP InfiniBand

connections, depending on the selected features.

Maximum bandwidth 8 GBps Read (100%, sequential), 4 GBps Write (100%, sequential).

Read IOPS 1,100,000.

Write IOPS 600,000.

Read latency 135 µs.

Write latency 90 µs.

Maximum volume support

(LUNs)

2 K (2048).

System management IBM SAN Volume Controller GUI is available in any supported

browser.

IBM SAN Volume Controller CLI.

SNMP.

Email alerts.

Syslog redirect.

Cooling Four hot-swappable fan modules.

IBM FlashSystem 840 Product Guide 6

Table 1. Specifications (part 1 of 2)

Specification Description

Power supply Two redundant hot-swap 100 - 240 V AC auto-sensing power supplies.

Input power 900 watts.

Heat dissipation Approximately 2133 BTU. For maximum configurations, it could go as high as

3753 BTU (maximum configuration RAID 5).

Hot-swap parts All active components.

Security features AES-XTS 256 bit data-at-rest encryption with local key management.

Platforms supported For specific information, see the IBM System Storage Interoperation

Center (SSIC) at

http://www.ibm.com/systems/support/storage/ssic/interoperability.wss

Warranty Set of Machine Types in AAS, 24 X 7 Service level Agreement, 4 hour

response time:

9840-AE1 - One year.

9843-AE1 - Three years.

Service and support Optional warranty service upgrades and post-warranty services are

available on site with 24x7 2-hour, 24x7, or 9x5 same day, or 9x5 next

business day response,

Dimensions Width: 445 mm (17.5 in.) (19-inch Rack Standard)

Depth: 761 mm (29.96 in.)

Height: 86.2 mm (3.39 in.)

Models

The following set of Machine Types are supported in AAS as follows:

9840-AE1 - Warranty period 1 year

9843-AE1 - Warranty period 3 years

All FlashSystem 840 storage systems ship with the backup batteries, flash modules and blanks, power

supplies, fans, and canisters preinstalled. (The flash module type and quantity and the host interface I/O

cards must be pre-specified.)

The following items are also shipped with FlashSystem 840:

System chassis

Rack rail kit

Warranty documentation

Printed quick start guide

Selected power cables

Selected interface cables (if any)

IBM FlashSystem 840 Product Guide 7

Interface cards

IBM FlashSystem 840 supports only one interface type per system. For example, it is not possible to use

two Fibre Channel interface cards and two InfiniBand interface cards in the same enclosure.

Interface cards are sold in groups of four for a total of eight or 16 ports for each system.

IBM FlashSystem 840 supports the following interface protocols and number of connections:

Fibre Channel (16 ports of 8 Gbps; these ports also support 4 Gbps)

Fibre Channel (eight ports of 16 Gbps; these ports also support 8 Gbps and 4 Gbps)

Fibre Channel over Ethernet (FCoE) (16 ports of 10 Gbps FCoE)

Internet Small Computer System Interface (iSCSI) (16 ports of 10 Gbps iSCSI)

InfiniBand (eight ports of QDR InfiniBand 40 Gbps)

Fibre Channel support

Fibre Channel and Fibre Channel over Ethernet (FCoE) protocols use the same interface cards. However,

only one protocol is supported per IBM FlashSystem 840 enclosure. Figure 5 shows the Fibre Channel

interface card.

Figure 5. Fibre Channel interface card

IBM FlashSystem 840 supports the 16 Gbps Fibre Channel connection speed through the standard Fibre

Channel interface card.

Here are the rules for supporting 16 Gbps Fibre Channel on IBM FlashSystem 840:

If you use 16 Gbps Fibre Channel, only two (of the four) ports on the Fibre Channel modules can be

used. The two left-most ports (1 and 2) on each interface card are used for 16 Gbps support. If your

system is configured for 16 Gbps Fibre Channel, only the 2 left-most ports (1 and 2) per interface

adapter are used. The other two ports are disabled.

If you use 16 Gbps Fibre Channel, all four of the Fibre Channel modules are configured for 16 Gbps.

This configuration supports a total of eight Fibre Channel ports for the system (2 ports x 4 interface

cards).

IBM FlashSystem 840 Product Guide 8

Four Gbps and 8 Gbps Fibre Channel connections are supported on the same system connecting to

16 Gbps devices, but there are still only a total of eight available active ports (ports 1 and 2 on each

interface card). For example, an IBM FlashSystem 840 system can have four Fibre Channel

connections at 16 Gbps and four Fibre Channel connections at 8 Gbps.

Fibre Channel interfaces support Fibre Channel Protocol (FCP) only, with point-to-point (FC-P2P),

arbitrated loop (FC-AL), and switched fabric (FC-SW) topologies. FC interfaces can be configured as

port or NL

port types. It should be noted that FC-AL is not supported for ports connected at 16

Gbps.

Full active-active multipathing across all interfaces is supported. Host software support for this

function might vary.

Fibre Channel over Ethernet support

FlashSystem 840 supports 16 ports of 10 Gbps Fibre Channel over Ethernet. FCoE uses the same

interface cards as FC.

Fibre Channel and FCoE Interface Cards

Each FlashSystem 840 canister supports two Fibre Channel (FC) interface cards for a total of four FC

interface cards, 8 Gbps FC cards support four ports, 16 Gbps cards support two ports.

Table 2 shows the supported interface cards.

Table 2. FC/FCoE supported interface cards

Item Feature code Ports

FC/FCoE Host Interface Card AF15

Corequisites:

AF18, AF19, or AF1A

-Up to 16 ports of 8 Gbps Fibre

Channel (with AF18)

-Up to eight ports of 16 Gbps Fibre

Channel (with AF19)

-Up to 16 ports of 10 Gbps Fibre

Channel over Ethernet (with AF1A)

8 Gb FC 8 Port Host Optics AF18 Up to 16 ports of 8 Gbps Fibre

Channel

16 Gb FC 4 Port Host Optics AF19 Up to eight ports of 16 Gbps Fibre

Channel

10 Gb FCoE 8 Port Host Optics AF1A Up to 16 ports of 10 Gbps Fibre

Channel over Ethernet

iSCSI interface card

FlashSystem 840 supports 16 ports of 10 Gbps iSCSI for clients looking for alternatives to SANs. The

iSCSI interface card looks similar to the FC/FCoE cards with Fibre optical connections as shown in the

previous Figure 5.

Table 3 shows the supported iSCSI interface card and port optics.

Table 3. iSCSI supported interface cards

Item Feature code Ports

iSCSI Host Interface Card AF17 (Corequisite : AF1D) Up to 16 ports of 10 Gbps iSCSI

10 Gb iSCSI 8 Port Host Optics AF1D Up to 16 ports of 10 Gbps iSCSI

IBM FlashSystem 840 Product Guide 9

InfiniBand interface card

IBM FlashSystem 840 supports four two-port InfiniBand 40 Gbps cards. A total of eight ports of 40 Gbps

InfiniBand connections are supported per IBM FlashSystem 840.

IBM FlashSystem 840 InfiniBand cards each have two 4X QDR ports. The InfiniBand card ports can

connect to Quad Data Rate (QDR), Double Data Rate (DDR), or Single Data Rate (SDR) InfiniBand HCAs

by using the SCSI RDMA Protocol (SRP). IBM FlashSystem 840 InfiniBand interfaces support SCSI

RDMA Protocol (SRP) only.

Table 4 lists the supported InfiniBand interface card.

Table 4. Supported InfiniBand interface card

Item Feature code Ports

QDR IB 4 Port Host Interface Card AF16 Eight ports of 40 Gbps QDR

InfiniBand

Flash modules

FlashSystem 840 provides configurable flash module capacity. All modules are hot-swappable.

FlashSystem 840 can be populated with up to 12 flash modules in increments of 2, 4, 6, 8,10, or 12.

These modules can be either 1 TB, 2 TB, or 4 TB and cannot be intermixed. Capacity can be upgraded by

purchasing the AF1B (1 TB), AF10 (2 TB), or AF11 (4 TB) flash module feature codes as MES upgrades.

Here are the upgrade paths:

Using AF1B (1 TB)

RAID 0:Start with 2 TB and grow to 4 TB, 6 TB, 8 TB, 10 TB or 12 TB.

RAID 5:Start with 2 TB and grow to 4 TB, 6 TB, 8 TB, 10 TB.

Using AF10 (2 TB)

RAID 0:Start with 4 TB and grow to 8 TB, 16 TB, or 24 TB.

RAID 5:Start with 4 TB and grow to 12 TB or 20 TB.

Using AF11 (4 TB)

RAID 0:Start with 32 TB and grow to 48 TB.

RAID 5:Start with 8 TB and grow to 24 TB or 40 TB.

IBM FlashSystem 840 Product Guide 10

Table 5 lists the supported flash modules.

Table 5. Supported flash modules

Description Feature code Maximum quantity supported

1 TB eMLC Flash Module AF1B 12

2 TB eMLC Flash Module AF10 12

4 TB eMLC Flash Module AF11 12

For RAID 0, these configurations have capacity points of 2 TB, 4 TB, 6 TB, 8 TB, 10 TB, 12 TB, 16 TB, 20

TB, 24 TB, 32 TB, 40 TB, and 48 TB.

For RAID 5, these configurations have capacity points of 2 TB, 4 TB, 6 TB, 8 TB, 10 TB, 12 TB, 16 TB, 20

TB, 24 TB, 32 TB, and 40 TB.

IBM Variable Stripe RAID

Variable Stripe RAID data protection is a unique, self-healing data protection that is managed

independently by each flash controller on each flash module. With Variable Stripe RAID, every flash

controller creates a striped data layout across its set of 10 chips similar to a 9+1 RAID 5 array with

rotating parity. The Variable Stripe RAID stripe (page) size is 4 KB. When the Variable Stripe RAID

algorithm detects a failure affecting one or more flash module in a RAID stripe, the following process

happens:

Data that is stored in the affected regions is reconstructed from the remaining data/parity elements in

the stripe.

All pages in the affected stripe, including the reconstructed data, are moved to reserved space

(overprovisioned area).

Subsequent requests for data in the affected stripe are directed to the new locations (now part of the

normal storage area in the system).

The original location of the affected stripe is added to the available overprovisioned area as a (n-1) +

parity stripe. (For example, if the affected stripe was a 9+1 stripe, it becomes an 8+1 stripe.).

No system-level rebuild process is necessary to maintain data protection or usable capacity after a failure

caught by Variable Stripe RAID. Further more, the entire Variable Stripe RAID recovery process is

automatic and transparent to the user and administrator, and typically takes place in less than a second.

Variable Stripe RAID activities are not normally tracked in system logs, but the root causes of failures that

are typically handled by Variable Stripe RAID-plane failures and block failures are tracked in system

counters and reflected in the overall flash module and system health metrics.

IBM Two-dimensional (2D) Flash RAID

The combination of IBM Variable Stripe RAID and system-level RAID 5 protection across flash modules is

called two-dimensional (2D) Flash RAID. Variable Stripe RAID automatically and transparently protects

against partial or full flash chip failures within the flash module, with no downtime or maintenance

required. System-level RAID 5 adds protection against complete flash module failure and enables

hot-swappable flash modules. Additionally, all active components are redundant and hot-swappable with

tool-less access from the front or back of the system, enhancing two-dimensional RAID protection.

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