EMC AX4-5 Manuale utente

AX4-5 Series

Hardware and Operational

Overview

January 4, 2010

This overview describes the major hardware features of AX4-5 series

storage systems.

For greater clarity, the illustrations in this document show the storage-system

chassis independent of a cabinet or deskside mounting

Topics include

Storage-system components........................................................... 2

Disk and filler modules.................................................................. 5

Storage processors (SPs)................................................................. 7

Link control cards (LCCs) .............................................................. 8

Power/cooling modules ................................................................ 9

Standby power supplies (SPSs)....................................................... 10

Powerup and powerdown sequence ............................................... 11

Status lights and indicators ............................................................ 15

Storage-system components

The AX4-5 series storage system consists of rack-mountable

storage-system enclosures, 3.5 inches (2U) high, that contain 4 to 12

serial advanced technology attachment (SATA) or serial attached SCSI

(SAS) disk drives.

The AX4-5 and AX4-5SC storage systems use a Fibre Channel arbitrated

loop (FC-AL) or Fibre Channel switch (FC-SW) as an interconnect

interface to host servers. The AX4-5i and AX4-5SCi storage systems use

the Internet Small Computer System Interface (iSCSI) protocol.

The AX4-5 and AX4-5SC are also called the AX4-5F and AX4-5FSC, respectively.

Models with four Fibre Channel host ports per controller are called AX4–5F8

or AX4–5FX, and AX4–5SCF4 or AX4–5FSCX. The AX4-5i and AX4-5SCi are

also called the AX4-5I and AX4-5ISC, respectively.

Navisphere® management software manages the storage systems from

any qualified workstation on a shared Ethernet LAN. Sophisticated

RAID (redundant array of independent disk) technology and data

caching prevent data loss in case of component failure. Redundant

hardware options provide levels of high availability usually restricted

to much larger (and more expensive) storage systems. Besides

economical disks, the AX4-5 series storage systems include the

following major components:

A disk-processor enclosure (DPE-AX). A DPE-AX contains one

(AX4-5SC or AX4-5SCi) or two (AX4-5 or AX4-5i) storage processors

(SPs), each with:

zOne dual-inline memory module (DIMM)

zOne serial port (mini DB9 connector) for service

zOne 10/100/1000 Ethernet LAN port (RJ45 connector) for

management

zFor the AX4-5 or AX4-5i, one serial port for connection to a

standby power supply (SPS)

zOne input/output (I/O) module per SP, each with:

−For the AX4-5 or AX4-5SC, two or four 4-Gbps Fibre Channel

host ports with small form factor pluggable (SFP) connectors

2Hardware and Operational Overview

−For the AX4-5i or AX4-5SCi, two Gigabit Ethernet (GigE)

ports

Two power supply/system cooling (power/cooling) modules

Figure 1 shows an AX4-5 DPE-AX, which has Fibre Channel I/O

modules.

FRU Label FRU Label

CL3914

Expansion DAE

SPS management

Power/cooling module

cooling fault LED

Power supply

fault LED

Power supply on

Fibre

SP service

SP management

SP fault LED

SP power LED

Figure 1 AX4-5 DPE-AX (rear view – two FC port version)

Figure 2 shows an AX4-5i DPE-AX, which has iSCSI instead of Fibre

Channel I/O modules.

FRU Label FRU Label

CL3771

iSCSI

Figure 2 AX4-5i DPE-AX (rear view)

Figure 3 shows an AX4-5SC DPE-AX with a single storage processor.

FRU Label FRU Label

CL3853

Figure 3 AX4-5SC DPE-AX (rear view — two FC port version)

Figure 4 shows an AX4-5SCi with a single storage processor.

Hardware and Operational Overview 3

FRU Label FRU Label

CL3854

Figure 4 AX4-5SCi DPE-AX (rear view)

AX4-5 and AX4-5i systems include a standby power supply (SPS); a

second SPS is optional. AX4-5 and AX4-5i systems support as many as

four optional disk array enclosures (DAE-AXs). Like the DPE-AX, each

DAE-AX includes two power/cooling modules and can contain a total

of twelve disk drives. Instead of SPs, a DAE-AX has two link control

cards (LCCs) that manage disks on a single redundant back-end bus.

You can install, upgrade, or replace all of the major storage-system

components without professional assistance.

4Hardware and Operational Overview

Disk and filler modules

Each DPE-AX includes at least four hard disk drives. The first four

disks, marked 0-3, are system disks (sometimes called vault disks) and

contain vital software specific to the physical slot they occupy in the

chassis. Do not move a system disk from its assigned slot to another slot.

Remove a system disk only if you need to replace it because it failed.

SN:1234ABCD1234ABC

123 BPS

PN:123456789 REV 123

SATA

500

7.2K RPM

SN:1234ABCD1234ABC

123 BPS

PN:123456789 REV 123

SATA

500

7.2K RPM

SN:1234ABCD1234ABC

123 BPS

PN:123456789 REV 123

SATA

500

7.2K RPM

SN:1234ABCD1234ABC

123 BPS

PN:123456789 REV 123

SATA

500

7.2K RPM

SN:1234ABCD1234ABC

123 BPS

PN:123456789 REV 123

SATA

500

7.2K RPM

SN:1234ABCD1234ABC

123 BPS

PN:123456789 REV 123

SATA

500

7.2K RPM

SN:1234ABCD1234ABC

123 BPS

PN:123456789 REV 123

SATA

500

7.2K RPM

SN:1234ABCD1234ABC

123 BPS

PN:123456789 REV 123

SATA

500

7.2K RPM

SN:1234ABCD1234ABC

123 BPS

PN:123456789 REV 123

SATA

500

7.2K RPM

SN:1234ABCD1234ABC

123 BPS

PN:123456789 REV 123

SATA

500

7.2K RPM

SN:1234ABCD1234ABC

123 BPS

PN:123456789 REV 123

SATA

500

7.2K RPM

SN:1234ABCD1234ABC

123 BPS

PN:123456789 REV 123

SATA

500

7.2K RPM

CL3880

Figure 5 DPE-AX system(vault)disks

If a drive fails, you can replace it with another while the storage system

continues running; software rebuilds the contents of the original disk

onto its replacement.

DPE-AX and DAE-AX chassis have twelve slots for disk modules. Any

unoccupied disk module slot requires a filler module to maintain air

flow.

Disk modules

Each disk module, shown in Figure 6, consists of one disk drive in a

carrier. You can add or remove a disk module while the storage system

is powered up, but you should exercise special care when removing

drives while they are in use.

Hardware and Operational Overview 5

EMC2830

Figure 6 Disk module

Disk drives

The disk drives are standard 3.5-inch (8.75-cm) by 1.0-inch (2.54-cm)

serial advanced technology attachment (SATA) or serial attached

SCSI (SAS) drives. AX4–5 systems also support 2.5–inch SAS drives

mounted in 3.5–inch drive carriers. For a detailed list of supported

disk drives and the minimum revision of the FLARE®operating

environment (OE) that supports each disk, refer to the Disk and FLARE

OE Matrix under “Technical description” on the Learn page on the

storage-system support website or contact your service provider.

Drive carrier

The disk drive carrier is a plastic assembly that provides smooth,

reliable contact with the enclosure slot guides and system board

connectors. It has a handle with a latch and spring clips. The latch

holds the diskmoduleinplacetoensureproperconnectionwiththe

connectors.

6Hardware and Operational Overview

Storage processors (SPs)

The storage processor (SP) is the storage system’s intelligent component

andactsastheinp

ut/output (front end) and data storage (back end)

control center. Besides the processor board and memory DIMM, each

SP includes an I/O module that determines the connection protocol

to host servers.

DPE-AX systems with two SPs support write caching for increased

performance. The redundant storage processors also provide high

availability should one SP fail or lose power.

Hardware and Operational Overview 7

Link control cards (LCCs)

Optional disk array enclosures (DAE-AXs) do not include SPs, but use

link control cards (LCCs) to support additional disk capacity. The LCCs

in each DAE-AX connect to expansion ports on SPs or other LCCs with

serial-attached SCSI (SAS) expansion cables to create a redundant

back-end bus that can support both SATA and SAS drives. Each LCC

includes a display indicating the enclosure address of the DAE-AX; the

addressisassi

gned automatically by the system. LCCs also include a

service port connector. An LCC receives input from the previous SP

or LCC on the bus through a primary connector (marked by a circle

symbol) and can pass input to the next LCC on the bus through an

expansion connector (marked by a diamond symbol).

Figure 7 shows a DAE-AX with two LCCs below the power/cooling

modules.

CL3927

REV:AXX

*AXX*

P/N:118031924

*118031924*

S/N: VVVYYWWRRRRR

*VVVYYWWRRRRR*

REV:AXX

*AXX*

P/N:118031924

*118031924*

S/N: VVVYYWWRRRRR

*VVVYYWWRRRRR*

046-003-042_A03

FRU Label REV:AXX

*AXX*

P/N:118031924

*118031924*

S/N: VVVYYWWRRRRR

*VVVYYWWRRRRR*

046-003-042_A03

FRU Label REV:AXX

*AXX*

P/N:118031924

*118031924*

S/N: VVVYYWWRRRRR

*VVVYYWWRRRRR*





Expansion Primary

Figure 7 DAE-AX (rearview)

8Hardware and Operational Overview

Power/cooling modules

Each power/cooling module integrates an independent power supply

and blowers into a single module. The power supply in each module

is an auto-ranging, power-factor-corrected, multi-output, offline

converter.

The power/cooling modules, A and B, are located above the SPs

or LCCs. They share load currents and provide power and cooling

foranentireen

closure. An SP, LCC, or power/cooling module with

power-related faults does not adversely affect the operation of any

other component. If one power/cooling module fails, the other

compensates until the failed module is replaced. If the failed module is

in a dual-SP DPE-AX, the system also disables write caching. Removing

a power/cooling module from the enclosure causes a cooling fault that

will shut down the enclosure within two minutes.

Hardware and Operational Overview 9

Standby power supplies (SPSs)

A 1U, 1000-watt SPS provides backup power for power supply A. An

optional second SPS supports power supply B. During a power failure,

the SPSs allow write caching to continue, which prevents data loss. A

faulted or not fully charged SPS disables the write cache. Each SPS rear

panel has one AC inlet power connector with power switch, AC outlets

for the DPE-AX SPs, and one connector for serial connection to an SP.

Figure 8 shows the SPS connectors and status lights.

CL3881

AC power

connector

Power

switch

interface

DPE-AX

Active

(green)

Replace

battery

(amber)

On battery

(amber)

Fault

(amber)

Figure 8 1000–watt SPS connectors, power switch, and status lights

You can replace an SPS while the storage system is powered up.

10 Hardware and Operational Overview

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