primergy installation raid basics fujitsu siemens computers training documentation

PRIMERGY InstallationRAID Basics

Fujitsu Siemens Computers training documentation

RAID Basics PRIMERGY Installation Release November 2007 © Fujitsu Siemens Computers 2007 All rights reserved2

SAS/SATA Comparison


Disk Interface Comparison

Source: Fujitsu


Mixing of SAS and SATA Disks


RAID Basics


Redundant Array of Independent DisksA way of organizing several disks to provide performance OR resilience:

Tolerant to a disk failure

Types of RAID:

Standard: Level 0 - 5

Vendor Specific: 7 >

Associated technology

Hot plug

Hot Spare

More about RAID and RAID sizing on Student CD

disk_subsystem_sizing_-_raid_controller_1.0__en_.pdf

What is RAID ?


RAID Level 1+0 (10): Striped Mirrored Sets

Host System

Disk Array Controller (DAC)

Resilience

Reads Cost

Writes

Data Disk 1

Mirrored Disk 1

Mirrored Disk 1

Data Disk 1


RAID Level 7: JBOD – Just a bunch of disks

Host System


JBOD

Just a way of declaring normal disks under a RAID controller.

(May include COD information)


RAID 1E: An LSI specific Level

Host System


Data Disk 1

Mirroring over more than two disks.

During the “Mylex era” this was called Mylex-RAID 6, This is confusing since there

is a standard RAID level called RAID6 that has a completely different function

Data Disk 2 Data Disk 3

33

44

2

21 1


Standard O/S Support Windows 2000/2003 includes RAID 0, 1 & 5 Netware offers RAID 0, 1, 5 & 10 Unixware offers Online Storage Manager (0, 1, 0+1 & 5) Redhat & Suse Linux Include RAID 0, 1 & 5

Fujitsu-Siemens products DDM, Duplex Data Manager, Includes RAID 1 w Hot-spare(Important for MS Cluster configuration )

Implications of Software RAID

RAID 5/3 needs a Math Co-processor (for parity creation)

RAID often not supported on System/boot Partition (Except for FSC DDM)

No instant fail-over ( Except for FSC DDM)

Hot-Plug Support requires HW Control Mechanism.

Software RAID Support


Cache Policy

Write back Only enable with BBU or UPS Support

Write Through Does not use cache Big Impact on Parity RAID performance

Predictive cache (Read Ahead pattern matching) (for RAID disable it) Switch off – most requests are not synchronous

Cache Size

Must Support BBU for a weekend.

Larger cache boosts parity raid if using write back policy

HW RAID


RAID 2,5 “ and 3,5 “


PRIMERGY RX300/RX200 S3 - 2.5-inch HDD

6 x 3.5” Hot-plug HDD




RX200 S3 RX300 S3

2 x 2.5” Hot-plug HDDTX120


SATA / SAS HDDs 06/2007

Size Technology Rotation Capacity

3,5" SAS 15k36, 73, 146, 300 GB

2,5" SAS 15k 36, 73 GB

3,5" SAS 10k36, 73, 146,300 GB

2,5" SAS 10k 36, 73, 146 GB

3,5" SATA 7.2k80, 160,250, 500, 750 GB


SAS HDD SATA HDD

R 0/1/10 R5/50 R 0/1/10 R5/50

TX150 S5

SATA Base Unit - -Onboard LSI MegaSR

=ICH7R

ICH 7R + ibutton option(Windows only)

or LSI MegaRAID SATA 8308ELP (Altair)

SAS Base UnitOnboard LSI 1068

IME

MegaRAID ZCR-SAS - LSI 8300XLP

Onboard LSI 1068 IMEMegaRAID ZCR-SAS -

LSI 8300XLP

TX200 S3SATA Base Unit - - Onboard ESB2

Onboard ESB2 + ibuttonOr RAID5 Embedded MegaRAID SW LSI


IMEZCR-SAS - LSI

8300XLPOnboard LSI 1068 IME

(p)ZCR-SAS - LSI 8300XLP

TX300 S3RX300 S3

(Common Base Unit)

Onboard LSI 1068 IME

LSI MegaRAID SAS

ROMB

Onboard LSI 1068 IME LSI MegaRAID SAS ROMB

RX100 S4SATA Base Unit - -

Embedded SATA software RAID ICH7R (R

0/1) -


IME-

Onboard LSI 1068 IME (p)

-

RX200 S3(Common Base Unit)

Onboard LSI 1068 IME

ZCR-SAS - LSI 8300XLP

Onboard LSI 1068 IME ZCR-SAS - LSI 8300XLP

SCSI/ SATA / SAS HDD and Controllers


LSI RAID Controller on Board


SAS / SATA

Motherboard

Enterprise

Southbridge2

(ESB 2)

TX200 S3 onboard SATA RAID 1/0 with ESB2

ESB2 = RAID 0/1 + opt Key for RAID5


TX200 S3 onboard SATA RAID 1/0 with ESB2


SAS / SATA

Motherboard

SAS Ctrl.

LSI 1068

PCI-X 133

RX300 S3 onboard IME RAID 1/1E


LSI SAS Raid

To enter the controller press <CTRL+C>


LSI SAS Raid

Automatic Rebuild

Supports Hot Spare Disk


SAS / SATA

Motherboard

Flash ROM

Raid Firmware

Stack (LSI)

iButton

(Raid Key)

IOP

(Intel Brockton)

SAS Ctrl.

LSI 1068

Standard DDR2-533 / 667 DIMM Module

256 MB ECC with BBU ( 72 Std. hold time ), 256 MB without

BBU

PCI-X 133

PCI-

Express

Modules with BBU have Charge Circuit integrated

RX300 S3 onboard RAID5 with INTEL Brockton IOP block diagram


LSI Web BIOS


LSI pluggable PCI RAID Controllers


LSI MegaRAID SAS abcd

ab--> Type,

c --> external SAS connections

d --> internal SAS connections

Example LSI MegaRAID SAS 8344ELP 83 Type 4 external connections 4 internal connections

LSI controller naming


pluggable RAID controller

Onboard RAID extension (ZCR) 8300XLP

LSI MegaRAID SATA 8803ELP

LSI MegaRAID SAS 8344ELP For disk Expansion with SX40

LSI MegaRAID SCSI 320-2xFor disk Expansion with SX30


LSI Web BIOS



Onboard RAID extension (ZCR) 8300XLP


SAS

PCI

ZCR card must be in correct slot that has the logic to enable it to utilise the onboard SCSI or SAS

Most modern FSC motherboards colour code this blue

Match LSI ZCR with LSI chip on motherboard

Tx150S5,RX200S3 and Tx200S3

Zero Channel RAID


Customer Rules Only FibreCAT SX40 disk drives are released. SAS drives from FibreCAT SX60/80 are not

compatible!

Controller is released for FibreCAT SX40 connection only

Controller is not released for internal connection

Max. SAS cable length between controller – box / box – box is 2 m

FibreCAT SX40 must be up before power on of connected controller/server and Controller/server must be powered off before FibreCAT SX40

Redundant path configurations (using two I/O-Modules) are not released

Controller is not released for use as a shared Cluster device in Cluster Configurations

It is strongly recommended to save RAID configurations with MegaCLI

Controller Hotplug is not released

FibreCAT SX40 Hotplug is not released

Tape devices and optical devices (e.g. DVD) are not supported

OS boot from FibreCAT SX40 will be supported with next major release

Replacing a Hot Spare by a new hard disk, this new hard disk stops being handled as Hot Spare in SAS firmware. You need to reconfigure this new hard disk as Hot spare.



RAID Options

*reboot during Capacity extension and RAID migration is not allowed


Lab - General

Lab General Explain Signs

Explain Shares

\\192.168.xx.200\Download\

…


Lab – General


Exercise 02

Configure LSI IME SAS and SATA


Exercise 03

Configure LSI Web BIOS

primergy installation raid basics fujitsu siemens computers training documentation

Documents

raid controller

raid sizing

standard raid level

software raid support

fujitsu slide

parity creation raid

disk failure types of

fujitsusiemens products