Dear all. We use an "old" 48TB 4500 aka Thumper as iSCSI server based on snv_129. As the machine has only 16GB of RAM we are wondering if it''s sufficient for holding the bigger part of the DDT in memory without affecting performance by limiting the ARC. Any hints about scaling memory vs. disk space or the like Thanks ahead Thomas -- ----------------------------------------------------------------- GPG fingerprint: B1 EE D2 39 2C 82 26 DA A5 4D E0 50 35 75 9E ED