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|SAS-1/SAS-2 Compatibility Upgrade Guide For the Sun Blade 6000 Modular System|
A server module with a SAS-2 REM might hang when inserted into a Sun Blade 6000 Modular System chassis under the following conditions:
If the chassis contains SAS-1 NEMs, such as:
Sun Blade 6000 Multi-Fabric Network Express Module
Sun Blade 6000 Virtualized Multi-Fabric 10GbE Network Express Module
If the chassis contains Sun Blade 6000 Disk Modules (SAS-1 devices)
To ensure optimal system performance and avoid the potential for a system hang, you need to upgrade the SAS expander firmware of all SAS-1 NEMs and Sun Blade 6000 Disk Modules in the chassis to the latest available firmware update that supports SAS-1/SAS-2 coexistence.
The Sun Blade X6270 M2 is an example of a server module that ships with a SAS-2 REM. If you install a SAS-2 REM into a server module that previously did not have one, you will need to perform this upgrade before installing the server module into the chassis. Refer to your product documentation to determine whether your server module includes a SAS-2 REM (for more on available SAS-2 REMs, refer to System Requirements for the SAS-1/SAS-2 Compatibility Upgrade).
After performing the SAS-1/SAS-2 compatibility upgrade, the server module with the SAS-2 REM will be supported in the SAS-1 chassis with the following conditions:
The SAS-2 server module will function properly in the chassis and be able to use its own internal SAS-2 storage and its PCIe Express Modules (EMs).
The SAS-2 server module will be able to use the network component of SAS-1 NEMs.
The SAS-2 server module cannot use disks in a Sun Blade 6000 Disk Module (a SAS-1 device). This is an unsupported configuration.
The SAS-2 server module must be installed in a chassis slot that does not have a Sun Blade 6000 Disk Module in an adjacent slot.