AIX

HDLM

dlnkmgr view -drv view dlm devices.
dlmrmdev deletes dlm devices. Must be done before deleting underlying hdisk devices.
dlmpr -a clears all persistent reservations

Uninstall:

installp -u DLManager.mpio.rte
installp -u Hitachi.hacmp.support
installp -u Hitachi.aix.support.rte

emcpreg -add some-key to register powerpath software.
lsattr -El fscsixx, may want to see dynamic_tracking and fast fail are on
lsattr -El device check q depth (recommend 16) for all EMC or Powerpath devices seen in lsdev -Cc disk

no -p -o rfc1323=1 allows setting values greater than 4K; without this, send/recv sizes can be set higher, but will only use first 4K.
tcpdump puts interface into promiscuous mode

lssyscfg -r lpar -m msys --osrefresh force refresh os information on HMC
lslock -e frame-name list which HMC has a lock
viosvrcmd -m msys -p vio-name -c errlog run command on vio from HMC
viosbr dump VIOS config to a file. Use -view to view as a report.
print "cvai" | kdb | grep vscsi | grep -v read show vio name and vhost from client lpar
LMB size must be same on all systems for LPM (use lshwres with -F mem_region_size to view)
NIMBUG env variable - debug nim
alog -f file -o to view alog format files (e.g. nimlog)
vmo -o nokilluid=uid_num tell aix not to kill processes owned by this user when out of memory
rmcdomainstatus -s ctrmc test rmc connection, I = up, O = down.
pmcycles show CPU speed

12 cores per chip
8 SMT threads
S824 up to 2TB
CAPI adapters <500 instructions (vs 20K) to get to SSD disk
- appears like slow memory rather than fast storage

If user A has sugroups = x,y,z then all users in groups x,y,z can su to user A

Force a primary SEA (currently in auto mode) to fail over to standby...

chdev -l <SEA device> -a ha_mode=standby

Bring it back...

chdev -dev <SEA device> -attr ha_mode=auto