Red Hat LINUX VIRTUAL SERVER - FOR ENTERPRISE LINUX 5.2 REV 05-2008 Manuale Utente Pagina 16

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System z kernel features – DASD
DASD HyperPAV support (kernel 2.6.25)
Parallel access volumes (PAV) is a storage server feature, that allows to start
multiple channel programs on the same DASD in parallel. It defines alias
devices which can be used as alternative paths to the same disk.
HyperPAV is activated automatically when the necessary prerequisites are
there: (DS8000 with HyperPAV LI and z/VM 5.3, when running Linux on System
z as a VM guest)
See Document: "How to Improve Performance with PAV"
SIM: system information messages (kernel 2.6.25)
With this feature the system reports system information messages (SIM) to the
user. The System Reference Code (SRC), which is part of the SIM, is reported
to the user and allows to look up the reason of the SIM online in the
documentation of the storage server.
4G FICON Express support (test only)
Ensure that the new 4G FICON links work with the existing DASD driver.
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