Multipathing/failover software support on the VIOS:
AIX Multipath I/O (MPIO)
IBM TotalStorage Multipath Subsystem Device Driver (SDD v1608) for ESS and SVC
IBM TotalStorage Multipath Subsystem Device Driver (SDDPCM v2108) for ESS and SVC
RDAC
PowerPath (EMC)
HDLM (HDS)
syslog is one of the best logging utilities,The errpt logging is enabled by default in AIX. To enable syslog, /etc/syslog.conf file must be modified, here are the steps:
1. append follow in syslog.conf file:
*.debug /usr/syslog.log
*.info /usr/syslog.log
In situations below, the disk devices will require re-configuration:
1. Converting SRDF from/to Non-SRDF device
2. Due to host failure or planned maintenance, RDF1 (R1) and RDF2 (R2) are swapped
3. Symmetrix FA ports attached to the host have sc3/sc2 bit set
Page 1 of 21