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SAT is implemented as a standalone image. You can boot it from ISL. This means
you can analyze system failures as soon as they occur without taking a dump.
Being a bootable utility, SAT runs in the area of memory saved
by MMSAVE during the boot from the primary boot path. SAT directly
accesses main memory, the memory save area on LDEV 1 and virtual
storage on the system disks. Like DAT, SAT requires that the data
structures involved in virtual address translation be intact in
order to support virtual addressing.
SAT lets you analyze a failure quickly without going through
the dump process. Then, if you do decide to make a dump tape, exit
to ISL and invoke the DUMP utility. The main memory contents and
the data on disk are not altered by SAT.
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