FIGURE 2-4,

The host, using multipathing software, is presented with two primary (active) paths for each LUN, allowing the host to route I/O through either or both HBAs.

If a path failure occurs before the second tier of Sun StorEdge network FC switch-8 and switch-16 switches, one of the paths is disabled—but the other path continues sending I/O as it normally would and takes over the entire load. Refer to

which illustrates a path failure before the second tier of switches.

No Sun StorEdge T3+ array failure is noted because of the redundant path, by way of the Sun StorEdge network FC switch-8 and switch-16 switch T ports.

LUN0 - 10G

Active-MPDrive0

LUN1 - 10G

Active-MPDrive1

Host with HBA-0 and HBA-1

LUN0 - 10G

Active-MPDrive 0

LUN1-10G

Active-MPDrive1

Switch

FAILURE

Switch

SAN

 

 

 

 

 

Database

 

Virtualization

 

 

 

Engine (2)

 

MPDrive

 

 

 

Carved LUNs

 

 

 

Masking

 

 

 

 

 

 

Storage I/O and

Virtualization Engine Communications Traffic

Switch

Switch

LUN0 - 500G Passive-Master

Logical Multipath Drive MPDrive 0

LUN0 - 500G Active-Master

 

 

 

 

 

LUN1 - 500G

 

 

 

Active -

 

 

Logical Multipath

Alternate Master

 

 

 

 

 

 

 

Drive MPDrive 1

 

 

 

 

 

 

 

 

 

 

LUN1 - 500G

Passive -

Alternate Master

T3ES

(Master)(0A - 1P)

(Alternate Master) (1A - 0P)

FIGURE 2-4Path Failure—Before the Second Tier of Switches

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

Sun Proprietary/Confidential: Internal Use Only

Page 34
Image 34
Sun Microsystems 3900, 6900 manual 4Path Failure-Before the Second Tier of Switches

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.