1st is the primary NAS featuring 24 SAS disks 15k 600GB
2ns is the secondary NAS featuring 12 SATA disks 7.2k 3000GB ( cold backup )
both owns a dual 10Gb/s card put in LACP bonding mode
on the secondary NAS I'm going to make a ZFS fs for dCache and provide ~5TB to the PSI T3 ; it's a shame to use this HW only for backups ( 5y warranty )