Protocol Analyzers

SAS Sierra M122A

The SAS Sierra M122A Protocol Test System is Teledyne LeCroy's 7th generation protocol analyzer system that provides 100% accurate protocol capture of both SAS (SAS 3.0) and SATA (SATA 3.0). The industry's most widely used test platform for SAS and SATA features unmatched analysis and debug capabilities to help pinpoint problems at every layer of the protocol.

Explore SAS Sierra M122A Explore SAS Sierra M122A
SAS Sierra T244   The Industry's first SAS 4.0 protocol analyzer provides accurate and reliable capture of up to four SAS 24 Gb/s physical links for efficient test and debug of next generation storage systems.
SAS Sierra M124A   The flagship four port analyzer, exerciser and error injection system provides the most accurate and reliable capture of SAS 12 Gb/s protocol for fast debug, analysis and problem solving.
SAS Sierra M122A   The flagship two port analyzer, exerciser and error injection system provides the most accurate and reliable capture of SAS 12 Gb/s protocol for fast debug, analysis and problem solving.
SAS Sierra M6-4   The flexible four port multifunctional analyzer system for SAS2 and SATA (6G)
SAS Sierra M6-2   The flexible two port multifunctional analyzer system for SAS2 and SATA (6G)
SAS Sierra M6-1   The portable single port multifunctional analyzer system for SAS2 and SATA (6G)
Serial Attached SCSI (SAS) is the next-generation replacement of SCSI Ultra320. SAS is a serialized protocol. The serial interface offers several benefits over the existing SCSI parallel bus; allowing for high availability, complex storage topologies, and a lower cost structure.
High Availability: As with SATA, Serial Attached SCSI is a high-speed, point-to-point technology initially designed to operate at speeds up to 6Gb/sec. System designers have found that point-to-point serial connections are inherently more reliable than shared bandwidth parallel connections. As a result, point-to-point serial connections have become the preferred method for implementing high-availability systems. SAS based disk drives are dual ported, taking advantage of this feature. This is a key requirement of high-availability SANs that call for redundant paths to all devices in the system.
Complex Storage Environments: SAS storage environments usually consist of a mixture of disk drives, host bus adapters and expanders. SAS allows for addressing of over 16,000 devices. SAS Expanders are routing devices that forward service requests between the source and destination devices. Expanders can be attached to other expanders, disk drives, and other hosts. An important characteristic of Expanders is their ability to aggregate bandwidth by combining multiple physical links into a "Wide" port. These wide ports can function as intelligent switches and can independently send commands across one physical path with data being returned over a different physical path. This increases the complexity of SAS test and debug because it requires users to monitor multiple links concurrently to record all DWORDs associated with a single SCSI transaction. The usage of expanders also allows for usage of a storage concept called Zoning. Zoning allows administrators to restrict access to devices by other devices. Applications of this include separating storage systems within a company by department.
Lower Cost Structure: Serial Attached SCSI also contains support for SATA drives in its storage environments. This allows support for both enterprise-class performance offered by SAS and low cost storage with SATA drives in the same system. Since the cost of the SAS infrastructure is expected to be comparable to SATA, it is likely that SAS will be the preferred interface. Since both SAS and SATA drives can be used in this environment, it will simplify and standardize the storage infrastructure, allowing for the ability to choose which drive will best fit individual storage needs.
Protocol Analysis
SAS Test and Verification: LeCroy's protocol analysis tools are designed from the ground up to address these unique characteristics of SAS including wide-links and Serial ATA interoperability. Sierra’s analysis and design suites are developed specifically for use with the SAS and SATA protocols, and provide extensive protocol decoding, expert error analysis, and complete user support when decoding and viewing the recorded traffic. This extensive protocol support, combined with the different traffic views, advanced triggering, data filtering, traffic generation, and error injection capability, allows engineers to rapidly become familiar with SAS- and SATA-specific issues, and quickly understand new issues the first time they encounter them. Every engineer becomes a protocol expert with the support of Sierra’s detailed expert analysis.

Leveraging LeCroy's extensive expertise in high-speed serial data analysis, the Sierra M122A provides the most accurate capture, display and analysis of both SAS and SATA protocol at data rates up to 12 Gb/s. This multifunction validation platform is available with an integrated traffic generator capable of host and device emulation. The error injection option allows stress testing at the system and component level. Combining best-in-class hardware capabilities with comprehensive analysis features, the Sierra M122A is the easy choice for SAS/SATA protocol test.

Flexible, Cost Effective 12G Protocol Test System

Based on the highly regarded Sierra M124A validation system, the M122A offers the same high fidelity probe design in a lower-cost configuration. With two recording channels, the M122A can monitor dual port SAS targets during failover testing. Cascade multiple Sierra M122A systems (up to 8) for monitoring traffic between 4-port expander devices. The Sierra M122A can be upgraded with traffic generation (Trainer) or error injection (InFusion) capabilities allowing this single platform to address both debug and verification tasks.

Unmatched Accuracy with T.A.P.3

The Sierra M122A features custom probe technology known as T.A.P.3 (Transparent Acquisition Probing) which has been field proven in Teledyne LeCroy’s market-leading Summit PCIe 3.0 analyzer platform. Designed to non-intrusively record SAS 12 Gbps signaling, T.A.P.3 technology utilizes a custom linear amplifier and line conditioner that passes through signals that are very close in physical behavior to those on the probe’s receiver. With this implementation, the dynamic equalization protocol that is part of the SAS 12G PHY layer is also preserved. Extensively tested with early 12 Gbps SAS HBAs and devices, the Sierra M122A has shown seamless interoperability and zero functional impact on the system under test.

Detailed Protocol Specific Support

Sierra's analysis tools are developed specifically for use with the SAS and SATA protocols to provide extensive decoding and expert error analysis when viewing recorded traffic. Combined with the different traffic views, advanced triggering, data filtering, traffic generation, and error injection capability, engineers have all the tools they need to identify problems and complete end-to-end validation testing.

Innovative, Flexible, and Compact System Design

The Sierra M122A platform is designed for convenience, portability, and flexibility. Both the M122A/M124A platforms are available in the full SAS 3.0 configuration (3G / 6G /12G) or with SAS 2.0 capabilities (3G / 6G only) allowing users to upgrade to 12G support in the future. Both data bus ports are located in the front for convenient access, as well as the system controls and connectors. The Sierra's array of status indicators includes information on negotiated link speed, protocol error detection, link-up, out-of-band (OOB) and data frames currently on the bus. The LCD screen reports which user is currently connected to the Sierra system, the system IP address and status, which can be set from the front panel interface. Host connectivity to the Sierra includes support for both USB 3.0 and Gigabit Ethernet. The expansion port allows for future enhancements, such as providing DC power to a drive. The Sierra enclosure is easily positioned on the bench top or integrated into a 19" rack.

Expert Analysis Software

From the link layer to the application layer, the Sierra analysis suite offers a wide range of traffic views and tools to enable engineers to easily zero-in on areas of interest. When working at the frame level, the Text View shows exchanges of frames and accompanying primitives. For viewing commands and frames in chronological order, the Spreadsheet View can filter out unwanted primitives and frames to simplify the display. The Sierra also features a hierarchical view for the application layer, logically assembling frames and primitives that are related to commands. The traditional hierarchical view groups commands, data, and status. This option shows gaps between command start and command end, or other complexities such as Time-Domain Multiplexing. The hierarchical display can be drilled-down to view the frame and link layers. All of the views for expert analysis can be used simultaneously and are automatically synchronized and displayed within one application.

Pin-point triggering

From looking for a particular frame, to more complex events such as timing and status between events, Sierra's logical triggering algorithms give the engineer the ability to quickly define multiple logical state changes with 4 independent timers and counters. Sierra's powerful trigger capabilities include up to a 24-level state sequencer, the ability to pre-filter at each state, and the ability to assign individual triggers to each port pair. Triggering on specific header fields or commands is easy thanks to protocol-specific awareness. Spend more time engineering and less time looking with the deepest trigger available.

Automated Intelligence through software

With Sierra's transparent post-processing, searching, and hiding of unwanted traffic, analyzing the captured data has never been easier. Protocol-specific decoding, including the full CBW as well as SAS and SATA event metrics allow engineers to easily determine what was captured at a glance. Event metrics including command throughput, completion time, command types, frames, bus events, and primitives all allow the engineer to quickly find areas of interest.

Performance reports can reveal command execution, errors, and other data traffic issues. Selecting from the broad range of reports provides each customer with rapid access to the information you seek.

Protocols SupportedSAS and SATA
Data Rates Supported12 Gb/s, 6 Gb/s, 3 Gb/s and 1.5 Gb/s
Trace Memory SizeUp to 32 GB
No of Ports SupportedM122A: Up to 2 ports
M124A: Up to 4 ports
CascadeableM122A: Up to 16 ports
M124A: Up to 32 ports
TriggeringAdvanced State Machine Trigger
FilteringPre-recording and Post-recording
Spread Spectrum ClockingYes
Performance AnalysisYes
Simulated Waveform Display of OOBYes
Data Bus InterfaceM122A: MiniSAS HD Connectors
Front Panel ConnectorM122A: MiniSAS HD Initiator, MiniSAS HD Target, External Trigger In/Out, USB 3.0, Gigabit Ethernet
Front Panel IndicatorsM122A: LEDs (Trigger, Error, Line, Link Speed, Frame/OOB) for each of 2 initiators and 2 Targets; Status Display Panel
Rear Panel ConnectorsM122A: AC Power, Expansion Slot
Host RequirementsWindows 8.1 / Windows 7 / Windows XP / Windows Server 2012 (x64) / Windows Server 2008 (R2)
Host InterfaceUSB3.0 or USB2.0 or  Gbe
DimensionsM122A: 39.4 x 36.3 x 4.45 cm (15.5” x 14.3” x 1.75”)
WeightM122A: 3.0 Kg (7.5 lbs)
Power RequirementsM122A: 90-254 VAC, 47-63 Hz, 200W Max
Operating Temperature0 to 50 C (32 to 121 F)
Non-operating-20 to 80 C (-4 to 176 F)
Operating Humidity10% to 90% RH (non-condensing)
Sierra Error Injector (Jammer)
Sierra SAS Traffic Generator
SAS 6 Gbps Analysis Option
CrossSync Multi-Protocol Analysis option
Sierra External Power Expansion Card v2
SAS Verification Option
1U Zero Carrying Case