Hello  The flags change the way the FA responds to the HBA and the way the devices modified respond to SCSI3.  The changes can be done online - however you will need to reboot the host(s) afterwards.  Thankyou  Sam Claret EMC TSE3
Hi All,  I got info about configuration required for MS cluster 2008 and do following modifications:  1.  C:\>symmask -sid 1128 -wwn 10000000c9895635 -dir 13a -p 0 set hba_flags on SPC2 -enable C:\>symmask -sid 1128 -wwn 10000000c9895635 -dir 13a -p 0 set hba_flags on SC3 -enable C:\>symmask -sid 1128 -wwn 10000000c9895635 -dir 13a -p 0 set hba_flags on OS2007 -enable C:\>C:\>symmask -sid 1128 refresh  2. symconfigure -sid xxxx -f previewsymconfigure -sid xxxx -f preparesymconfigure -sid xxxx -f commit file contents: set device 00b attribute=SCSI3_persist_reserv ;   Can I perform this procedure online without shutdown host first?  Thank you for input. Dennis
HBA flag for MS cluster 2008?