WD 4TB Red Plus 3.5" SATA3 CMR 128Mb Cache Hard Drive Designed and tested for RAID environments 1-8 Bay NAS, 5400RPM, 3 Years warranty

Capacity4 TBCache Size128 MBDisk Speed (RPM)5400rpmInterfaceSATACache Size (MB)128MBTransfer RateUp to 175MB/sCompatibilityDesigned with CMR technology for small or medium-sized businesses in RAID-optimized NAS systems with up to 8 bays. Perfect for handling increased workloads, including expanded OS compatibility and ZFS.Dimensions (L x W x H)146.99mm x 101.6mm x 26.11mm