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Chapter 1 Configuring DR 5
Note – The drivers currently released by Sun Microsystems that are known to be
suspend-safe are: st, sd, isp, esp, fas, sbus, pci, pci-pci, qfe,andhme (Sun
FastEthernet™); nf (NPI-FDDI); qe (Quad Ethernet); le (Lance Ethernet); the SSA
drivers (soc, pln, and ssd); and the Sun StorEdge A5000 drivers (sf, socal,and
ses). For additional information about suspend-safe and detach-safe device drivers,
contact your Sun service representative.
Allocating Sufficient Domain Swap Space
The domain swap configuration consists of the swap devices and swapfs (memory).
The domain must contain enough swap space so that it can flush pageable memory.
For example, if you want to remove 1 Gbyte of memory from a 2-Gbyte domain, you
will need 1 Gbyte of swap space, depending on the load. Insufficient swap space can
prevent the completion of a DR operation.
The domain swap space must be configured as multiple partitions on disks attached
to controllers hosted by different boards. With this type of configuration, a particular
swap partition is not a vital resource because swap partitions can be added and
deleted dynamically (refer to the swap(1M) man page for more information).
Note – When memory (swapfs) or swap space on a disk is detached, there must be
enough memory or swap space remaining in the domain to accommodate currently
running programs.
Qualifying Third-Party Device Drivers
Many third-party drivers (those purchased from vendors other than Sun
Microsystems) do not support the standard Solaris modunload(1M) interface, which
is used to unload detach-unsafe or suspend-unsafe device drivers. Conditions that
invoke the driver functions occur infrequently during normal operation and the
functions are sometimes missing or work improperly. Sun Microsystems suggests
that you test these driver functions during the qualification and installation phases
of any third-party device.