We have T3 array (18GB X 9, RAID 5) connect to E280 (Solaris 8). This server is dedicate for ORACLE database (version 8.1.7). The T3 array disk space only for ORACLE data files (at least 5M, most of them are several hundred MB). the current setup for this T3 array file system is: # mkfs -m /dev/dsk/c1t1d0s6 mkfs -F ufs -o nsect=128,ntrack=64,bsize=8192,fragsize=1024,cgsize=13,free=1,rps=120, nbpi=8240,opt=t,apc=0,gap=0,nrpos=8,maxcontig=128 /dev/dsk/c1t1d0s6 279191552 Someone suggest me re-config it and setup as: newfs -m 1 -c32 -C64 -f8192 -n1 -i65536 -r10000 /dev/dsk/c1t1d0s6 for better performance on ORACLE and T3.