Amazon.com: WD RE SAS 4 TB Enterprise Hard Drive: 3.5 Inch, 7200 RPM, SAS, 32 MB Cache - WD4001FYYG : Electronics
UCS-EZ7-1TB-HDD4 - Cisco 1TB 7200RPM SATA 6Gb/s Hot Pluggable 64MB Cache 2.5-Inch Hard Drive
Amazon.com: Western Digital WD4001FAEX WD Black - Hard drive - 4 TB - internal - 3.5 inch - SATA-600 - 7200 rpm - buffer: 64 MB : Electronics
NeweggBusiness - Toshiba X300 4TB Performance Desktop and Gaming Hard Drive 7200 RPM 128MB Cache SATA 6.0Gb/s 3.5 Inch Internal Hard Drive Retail Packaging HDWE140XZSTA
Seagate IronWolf Pro 4TB NAS Hard Drive 7200 RPM 256MB Cache CMR SATA 6.0Gb/s 3.5" Internal HDD ST4000NE001 - Walmart.com