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Avago Technologies
- 42 -
12Gb/s MegaRAID SAS RAID Controllers User Guide
February 2015
Glossary
R
RAID
Acronym for Redundant Array of Independent Disks (originally Redundant Array of Inexpensive Disks). An array (group) of multiple
independent drives managed together to yield higher reliability, performance, or both exceeding that of a single drive. The RAID
array appears to the controller as a single storage unit. I/O is expedited because several drives can be accessed simultaneously.
Redundant RAID levels (RAID levels 1, 5, 6, 10, 50, and 60) provide data protection.
RAID levels
A set of techniques applied to drive groups to deliver higher data availability, performance characteristics, or both to host
environments. Each virtual drive must have a RAID level assigned to it.
S
SAS
Acronym for Serial Attached SCSI. A serial, point-to-point, enterprise-level device interface that leverages the proven SCSI protocol
set. The SAS interface provides improved performance, simplified cabling, smaller connections, lower pin count, and lower power
requirements when compared to parallel SCSI. SAS controllers leverage a common electrical and physical connection interface that
is compatible with Serial ATA.
The SAS controllers support the ANSI Serial Attached SCSI Standard, Version 2.0. In addition, the controller supports the Serial
ATA III (SATA III) protocol defined by the Serial ATA Specification, Version 3.0. Supporting both the SAS interface and the SATA III
interface, the SAS controller is a versatile controller that provides the backbone of both server and high-end workstation
environments. Each port on the SAS RAID controller supports SAS devices, SATA devices, or both.
SAS device
Any device that conforms to the SAS standard and is attached to the SAS bus by a SAS cable. This includes SAS RAID controllers
(host adapters) and SAS peripherals.
SATA
Acronym for Serial Advanced Technology Attachment. A physical storage interface standard, SATA is a serial link that provides
point-to-point connections between devices. The thinner serial cables allow for better airflow within the system and permit smaller
chassis designs.
SMP
Acronym for Serial Management Protocol. SMP communicates topology management information directly with an attached SAS
expander device. Each PHY on the controller can function as an SMP initiator.
SSP
Acronym for Serial SCSI Protocol. SSP enables communication with other SAS devices. Each PHY on the SAS controller can function
as an SSP initiator or an SSP target.
STP
Acronym for Serial Tunneling Protocol. STP enables communication with a SATA device through an attached expander. Each PHY on
the SAS controller can function as an STP initiator.
strip
The portion of a stripe that resides on a single drive.
stripe size
The total drive space consumed by a stripe not including a parity drive. For example, if a stripe contains 64 KB of drive space and has
16 KB of data residing on each drive, the stripe size is 64 KB and the strip size is 16 KB.
A larger stripe size produces improved read performance, especially if most of the reads are sequential. For mostly random reads,
select a smaller stripe size.
striping
Drive striping writes data across two or more drives. Each stripe spans two or more drives but consumes only a portion of each
drive. Each drive, therefore, may have several stripes. The amount of space consumed by a stripe is the same on each drive that is
included in the stripe. The portion of a stripe that resides on a single drive is a strip, also known as a stripe element. Striping by itself
does not provide data redundancy; striping in combination with parity provides data redundancy.
Содержание
- Gb s megaraid sas raid controllers 1
- Gb s megaraid sas raid controllers user guide 1
- User guide 1
- Table of contents 3
- Chapter 1 overview 5
- Overview 5
- Sas sata standards and communication protocols 5
- General description 6
- Support for cachevault flash modules and cachevault power modules 6
- 12gb s megaraid sata sas raid controllers detailed descriptions 7
- Configuration scenarios 7
- Gb s megaraid sata sas raid controllers detailed descriptions 7
- Megaraid sas 9341 4i raid controller and megaraid sas 9341 8i raid controller 7
- Megaraid sas 9361 4i raid controller and megaraid sas 9361 8i raid controller 7
- Megaraid sas 9380 4i4e raid controller 7
- Megaraid sas 9380 8e raid controller 7
- Benefits of the sas interface 8
- C interface 8
- Figure 1 example of an lsi sas direct connect application 8
- Figure 2 example of an lsi sas raid controller configured with an lsisasx12 expander 8
- Nvsram flash rom peripheral bus 8
- Pci express interface 8
- Sas controllers leverage a common electrical and physical connection interface that is compatible with serial ata technology the sas protocols and the sata iii protocols use a thin 7 wire connector instead of the 68 wire scsi cable or 26 wire ata cable the sas sata iii connector and cable are easier to manipulate allow connections to smaller devices and do not inhibit airflow the point to point sata iii architecture eliminates inherent difficulties created by the legacy ata master slave architecture while maintaining compatibility with existing ata firmware 8
- Sas is a serial point to point enterprise level device interface that leverages the proven scsi protocol set sas is a convergence of the advantages of sata scsi and fibre channel and it is the future mainstay of the enterprise and high end workstation storage markets sas offers a higher bandwidth per pin than parallel scsi and it improves signal and data integrity 8
- Sas pci express raid controller 8
- Sas raid controller 8
- Sas sata iii device 8
- The following figure shows an example of a sas raid controller configured with an lsisasx12 expander that is connected to sas drives sata iii drives or both 8
- The sas interface uses the proven scsi command set to ensure reliable data transfers while providing the connectivity and flexibility of point to point serial data transfers the serial transmission of scsi commands eliminates clock skew challenges the sas interface provides improved performance simplified cabling smaller connectors lower pin count and lower power requirements when compared to parallel scsi 8
- Operating system support 9
- Pci express architecture 9
- Summary of 12gb s megaraid sata sas raid controller characteristics 9
- Sas features 10
- Pci express performance 11
- Sas array limitations 11
- Sata iii features 11
- Supports a dedicated pcie bus 11
- Supports x8 lane configuration 11
- The following list describes the pcie performance features of the raid controllers 11
- The following list describes the sata iii features of the raid controllers 11
- The following table lists the array limitations for the 12gb s megaraid sata sas raid controllers 11
- These raid controllers support 64 bit logical block addressing lba which makes it possible to connect a large number of drives to the raid controller directly and through expanders however the actual number of drives that you can attach depends on the limits listed in this table rather than by actual raid volume capacity 11
- They comply with the serial ata specification version 3 11
- They eliminate the master slave construction used in parallel ata 11
- They permit addressing of multiple sata targets through an expander 11
- They permit multiple initiators to address a single target in a fail over configuration through an expander 11
- They provide a pcie interface that does the following 11
- They provide a serial point to point storage interface 11
- They simplify cabling between devices 11
- They support sata iii data transfers of 6gb s 11
- They support stp data transfers of 6gb s and 3gb s 11
- This section describes the array limitations of the 12gb s megaraid sata sas raid controllers these limitations include the number of drives supported per controller the maximum number of drives per controller and the maximum number of virtual drives allowed per controller 11
- Drive roaming 12
- Flexibility features 12
- Usability features 12
- Drive migration 13
- Hardware specifications 14
- You can install the 12gb s megaraid sata sas raid controllers in a computer with a motherboard that has a pcie slot the following table describes the hardware configuration features for the 12gb s megaraid sata sas raid controllers 14
- Technical support 15
- Chapter 2 megaraid sas hardware installation 16
- Quick installation 16
- Requirements 16
- Detailed installation 17
- After installing the raid controller 19
- Sas device cables and connectors 19
- Figure 4 internal sas cable for connection to sas drives sata ii drives or sata iii drives 20
- Figure 5 sata iii connectors 20
- Note sas backplane connectors accept sas drives or sata drives but sata backplane connectors cannot accept sas drives 20
- The following figure shows sas connectors and sata connectors on sas drives and sata drives respectively cables connect internal connectors on the raid controllers to connectors on sas drives sata drives or both both sas drives and sata drives can connect to sas backplane receptacle connectors the difference between the sas connector and the sata connector is the bridge between the sas primary physical link and the power connector on the sas controller which the sata connector does not have 20
- The following figure shows the sas cable that connects the internal connectors on a sas raid controller to sas drives sata drives or both 20
- The following figure shows the sata iii device plug connector that connects a sas raid controller with internal connectors to the host receptacle connector on a backplane a sata iii connector consists of a signal connector and a power connector 20
- Figure 6 sas plugs sata plugs and sas backplane receptacle connector 21
- Connecting a raid controller with internal port connectors by cable to internal drives 22
- 12gb s megaraid sas raid controller family 23
- Chapter 3 megaraid sas raid controller characteristics 23
- Gb s megaraid sas raid controller family 23
- Megaraid sas 9341 raid controllers 23
- Megaraid sas 9361 raid controllers 24
- The following table describes the jumpers and the connectors on the megaraid sas 9341 8i raid controller 24
- The megaraid sas 9361 4i low profile sata sas raid controller controls four internal sas sata ports through one sff 8643 internal mini sas hd 4i connector 24
- The megaraid sas 9361 8i low profile sata sas raid controller controls eight internal sas sata ports through two sff 8643 internal mini sas hd 4i connectors 24
- Figure 9 card layout for the megaraid sas 9361 8i raid controller 25
- Megaraid sas 9361 8i raid controller board layout and jumper and connector information 25
- Note pin 1 on the headers and connectors is highlighted in red in this figure 25
- Note the megaraid sas 9361 4i raid controller is the same as the megaraid sas 9361 8i raid controller except that the j5a1 connector on the megaraid sas 9361 4i raid controller is a single internal port connector the j5a1 connector on the megaraid sas 9361 8i raid controller is a dual internal port connector 25
- This subsection provides the board layout and the connector and jumper information for the megaraid sas 9361 raid controllers the following figure shows the jumpers and the connectors on the megaraid sas 9361 8 controller 25
- The following table describes the jumpers and the connectors on the megaraid sas 9361 8i raid controller 26
- Figure 10 card layout for the megaraid sas 9380 4i4e raid controller 28
- Megaraid sas 9380 4i4e raid controller board layout and jumper and connector information 28
- Megaraid sas 9380 4i4e raid controllers 28
- Note pin 1 on the headers and connectors is highlighted in red in this figure 28
- The megaraid sas 9380 4i4e low profile sata sas raid controller controls four internal sas sata ports through one sff 8643 internal mini sas hd 4i connector and four external sas sata ports through one sff 8644 mini sas hd 4e connector 28
- This subsection provides the board layout and the connector and jumper information for the megaraid sas 9380 4i4e raid controller the following figure shows the jumpers and the connectors on the controller 28
- The following table describes the jumpers and the connectors on the megaraid sas 9361 8i raid controller 29
- Figure 11 card layout for the megaraid sas 9380 8e raid controller 31
- Megaraid sas 9380 8e raid controller board layout and jumper and connector information 31
- Megaraid sas 9380 8e raid controllers 31
- Note pin 1 on the headers and connectors is highlighted in red in this figure 31
- The megaraid sas 9380 8e low profile sata sas raid controller controls eight external sas sata ports through two sff 8644 mini sas hd 4e connectors 31
- This subsection provides the board layout and the connector and jumper information for the megaraid sas 9380 8e raid controller the following figure shows the jumpers and the connectors on the controller 31
- The following table describes the jumpers and the connectors on the megaraid sas 9380 8e raid controller 32
- 12gb s megaraid sas raid controller characteristics 33
- Each 12gb s megaraid sata sas raid controller ensures data integrity by intelligently validating the compatibility of the sas domain the 12gb s megaraid sata sas raid controllers use fusion mpt architecture which allows for thinner drivers and better performance 33
- The following table shows the general characteristics for all 12gb s megaraid sata sas raid controllers 33
- C tick mark 34
- Canadian compliance statement 34
- Ce mark 34
- Cispr class b 34
- Fcc self certification logo 34
- Japan vcci 34
- Korean mic 34
- Megaraid sas 9341 4i raid controller model 25461 34
- Megaraid sas 9341 8i raid controller model 25461 34
- Megaraid sas 9361 4i raid controller model 25420 34
- Megaraid sas 9361 8i raid controller model 25420 34
- Megaraid sas 9380 4i4e raid controller model 25190 34
- Megaraid sas 9380 8e raid controller model 25528 34
- Raid controller specifications 34
- Taiwan bsmi 34
- Technical specifications 34
- The design and implementation of the 12gb s megaraid sata sas raid controllers minimize electromagnetic emissions susceptibility to radio frequency energy and the effects of electrostatic discharge the 12gb s megaraid sata sas raid controllers show the following marks and certifications 34
- The following hardware is compliant with csa c22 no 60950 1 ul 60950 1 first edition listed accessory ul file number e257743 34
- The following table lists the specifications for the 12gb s megaraid sata sas raid controller 34
- Array performance features 35
- The following table shows the array performance features for the 12gb s megaraid sata sas raid controllers 35
- Airflow must be at least 75 linear feet per minute lfpm to avoid operating the lsisas3008 processor above the maximum ambient temperature 36
- All power is supplied to the megaraid sas 9341 raid controller through the pcie 12v rail onboard switching regulator circuitry operating from the 12v rail provides the necessary voltages 36
- Electrical characteristics 36
- Fault tolerance 36
- For the megaraid sas 9341 8i raid controller the operating thermal and atmospheric conditions are as follows 36
- Operating and nonoperating conditions for megaraid sas 9341 raid controllers 36
- Power supply requirements for the megaraid sas 9341 raid controller 36
- Relative humidity range is 5 percent to 90 percent noncondensing 36
- Temperature range 0 c to 55 c 36
- Temperature range 45 c to 105 c 36
- The following table lists the fault tolerance features for the 12gb s megaraid sata sas raid controllers 36
- The parameters for the nonoperating such as storage and transit environment for these controllers are as follows 36
- The supply voltages are 12v 8 percent from pci edge connector only the following table lists the power supply for the megaraid sas 9341 raid controller at peak mode and at normal power mode 36
- This subsection provides the power supply requirements for the 12gb s megaraid sata sas raid controllers 36
- Airflow must be at least 200 linear feet per minute lfpm to avoid operating the lsisas3108 processor above the maximum ambient temperature 38
- All power is supplied to the megaraid sas 9380 8e raid controllers through the pcie 3 v rails and the 12v rail onboard switching regulator circuitry operating from the 3 v rails and the 12v rail provides the necessary voltages the following states determine the typical current consumption of the controller 38
- For the megaraid sas 9380 4i4e raid controller the operating thermal and atmospheric conditions are as follows 38
- Note to maximize the lifespan of the cvpm module keep the ambient temperature as low as possible 38
- Operating and nonoperating conditions for megaraid sas 9380 4i4e raid controllers 38
- Power supply requirements for the megaraid sas 9380 8e raid controllers 38
- Relative humidity range is 20 percent to 80 percent noncondensing 38
- Relative humidity range is 5 percent to 90 percent noncondensing 38
- State 1 while sitting idle at the dos prompt 38
- State 2 during a drive stress test 38
- State 3 power on the controller with a deeply depleted cvpm module attached 38
- Temperature range 10 c to 55 c with or without the cvfm04 module attached 38
- Temperature range 40 c to 70 c 38
- The parameters for the nonoperating such as storage and transit environment for these controllers are as follows 38
- The supply voltages are 12v 8 percent from pci edge connector only and 3 v 9 percent from pci edge connector only the following table lists the power supply for the raid controllers for these three states at the different voltages 38
- The supply voltages are 12v 8 percent from pci edge connector only and 3 v 9 percent from pci edge connector only the following table lists the power supply for the raid controllers for these two states at the different voltages 38
- Safety characteristics 39
- Glossary 40
- Strip size 43
- The drive space consumed by a strip for example if a stripe contains 64 kb of drive space and has 16 kb of data residing on each drive the stripe size is 64 kb and the strip size is 16 kb the stripe depth is four four drives in the stripe you can specify strip sizes of 8 kb 16 kb 32 kb 64 kb 128 kb 256 kb 512 kb or 1 mb 43
- 00 rev a october 2013 44
- 00 rev b april 2014 44
- 00 rev c february 2015 44
- Revision history 44
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