SPARC M8 and SPARC M7 Series Servers: iSCSI over IPoIB - CMIOU/eUSB replacement considerations
(Doc ID 2107700.1)
Last updated on JANUARY 03, 2019
Applies to:SPARC M7-8 - Version All Versions and later
SPARC M7-16 - Version All Versions and later
SPARC M8-8 - Version All Versions and later
Information in this document applies to any platform.
When using iSCSI over IPoIB, The boot pool is composed of a ZFS mirror of the eUSB disks available in this Pdom.
Some other devices can be added to the boot pool when necessary. Virtual disks from another ldom for instance.
Best practices are to always have 2 or more devices in the boot pool.
When replacing a CMIOU or a eUSB disk in the domain, this may impact the boot of the domain as the CMIOU to be replaced will come with an empty eUSB, so is the eUSB to be replaced.
When accessible, the fallback mini root image on the SP (aka trampoline, tboot) can be used if no device/eUSB is valid in the boot pool.
At time of replacing a CMIOU/eUSB disk, the configuration must be considered so make sure that it will be possible to find a valid boot device from the boot pool.
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