Script to change FC card fc_err-recov and dytrunk value :

Step1:  for dir in fscsi0 fscsi1 fscsi2
do
chdev -dev $dir -perm  -attr fc_err_recov=fast_fail
done

Step2: for dir in fscsi0 fscsi1 fscsi2
do
chdev -dev $dir -perm -attr dyntrk=yes
done


To List:

for dir in  fscsi0  fscsi1 fscsi2
do
lsattr -El $dir|egrep "dyntrk|fc_err_recov"
done