Troubleshooting the A4 or B4 FC Link

The A4 or B4 link is the FC link from the switch to the Sun StorEdge T3+ array.

If a problem occurs with the A4 or B4 FC link:

In a Sun StorEdge 3900 series system, the Sun StorEdge T3+ array will fail over.

In a Sun StorEdge 6900 series system, no Sun StorEdge T3+ array will fail over, but an error with the FC link can cause a path to go offline.

FIGURE 5-11and FIGURE 5-12are examples of A4 or B4 Link Notification Events.

Site

:

FSDE LAB Broomfield CO

Source

:

diag.xxxxx.xxx.com

Severity :

Warning

Category :

Message

DeviceId :

message:diag.xxxxx.xxx.com

EventType:

LogEvent.driver.MPXIO_offline

EventTime:

01/29/2002 14:28:06

Found 2 ’driver.MPXIO_offline’ warning(s) in logfile: /var/adm/messages on diag.xxxxx.xxx.com (id=80e4aa60):

<snip>

----------------------------------------------------------------------

Site

:

FSDE LAB Broomfield CO

Source

:

diag.xxxxx.xxx.com

Severity :

Warning

Category :

Message

DeviceId :

message:diag.xxxxx.xxx.com

EventType:

LogEvent.driver.Fabric_Warning

EventTime:

01/29/2002 14:28:06

Found 1 ’driver.Fabric_Warning’ warning(s) in logfile: /var/adm/messages on diag.xxxxx.xxx.com (id=80e4aa60):

INFORMATION: Fabric warning

<snip>

status of hba /devices/pci@a,2000/pci@2/SUNW,qlc@5/fp@0,0:devctl on diag.xxxxx.xxx.com changed from CONNECTED to NOT CONNECTED INFORMATION:

monitors changes in the output of luxadm -e port

Found path to 20 HBA ports /devices/sbus@2,0/SUNW,socal@d,10000:0 NOT CONNECTED

FIGURE 5-11A4 or B4 FC Link Data-Host Notification

60 Sun StorEdge 3900 and 6900 Series 2.0 Troubleshooting Guide • March 2003

Sun Proprietary/Confidential: Internal Use Only

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Sun Microsystems 3900, 6900 manual Troubleshooting the A4 or B4 FC Link, 11A4 or B4 FC Link Data-Host Notification

6900, 3900 specifications

Sun Microsystems was a pioneering force in the computer industry, especially known for its innovative workstations and servers during the late 20th century. Among its notable product lines were the Sun 6900 and 3900 series, which played a critical role in enterprise computing, offering substantial advancements in performance and reliability.

The Sun 6900, also known as the Starfire, was an advanced multiprocessor server introduced in the mid-1990s. One of its standout features was its ability to support up to 64 processors, making it one of the most powerful systems of its time. This scalability was made possible by Sun’s innovative design, which utilized a high-bandwidth crossbar switch architecture that facilitated fast communication between processors, ensuring minimal latency and optimal performance for demanding applications.

The 6900 was built on the UltraSPARC architecture, which provided support for 64-bit processing. This was a significant advancement over 32-bit systems, allowing for improved memory addressing and overall application performance. The server supported large amounts of RAM, up to 512 GB, which was critical for memory-intensive tasks such as database management and scientific computation.

On the other hand, the Sun 3900 series catered to a different segment of the market, targeting businesses requiring robust, yet cost-effective server solutions. The 3900 was designed primarily as a mid-range server and offered impressive reliability features such as hot-swappable components and redundant power supplies. It came equipped with the SPARC architecture, ensuring compatibility with a wide array of software applications.

Both the 6900 and 3900 series made extensive use of Sun’s Solaris operating system, which was known for its stability and security. This operating system allowed for seamless multitasking and efficient resource management, a necessity for enterprise environments where uptime was critical.

In terms of connectivity, both systems supported advanced networking capabilities, including Fast Ethernet and Gigabit Ethernet options, facilitating improved data throughput. Their modular designs allowed for easy upgrades, ensuring that organizations could adapt to changing technological demands without major overhauls.

Overall, the Sun 6900 and 3900 series represented a significant leap forward in server technology, combining powerful processing capabilities, advanced scalability, and reliable performance. These systems played a crucial role in establishing Sun Microsystems as a leader in the enterprise computing arena during their era.