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I spent a few days looking through the code for this and I will be implementing a fix that should should relieve the performance issue seen when using the '-l' flag.
There is currently no way to avoid scanning through all the devices. A fair amount of investigation,
design, implementation and testing would be needed to change this behavior (assuming it is
possible to do so).
However, lscfg accepts a * (wildcard) as part of a device name.
For example,
lscfg -l hdisk*
would return output on all resources matching that string (string could be "hdisk*", "hdisk1*", etc).
# lscfg -l hdisk*
hdisk3 U789C.001.DQDFF62-P2-D4 SAS Disk Drive (73400 MB)
hdisk2 U789C.001.DQDFF62-P2-D5 SAS Disk Drive (73400 MB)
hdisk0 U789C.001.DQDFF62-P2-D3 SAS Disk Drive (300000 MB)
hdisk1 U789C.001.DQDFF62-P2-D6 SAS Disk Drive (300000 MB)
Though it is possible that this feature has never been tested with such a large number of
devices.
This usage would eliminate the overhead of the scan for each individual device/invocation of
the command since the command would only be run once. It would be the user's responsibility
to parse the returned output.
Does this provide any relief?
Creating a new RFE based on Community RFE #90503 in product IBM AIX.