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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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