6TB / 6000GB - SAS / Serial Attached SCSI Hard Drives are almost exclusively for usage in servers that use hot swappable (hot-swap) drives with a SAS hot pluggable backplane. You use a hard drive tray or caddy or sled, and simply slide and clip the drive into the front of your server. SAS hard drives can also be used in an internal, non hot-swap application. In this case they are connected by a cable to a connector on the SAS controller.
Example models are: 0F18370 HUS726060ALS4640 .
Hot-swap SAS / Serial Attached SCSI hard drives are commonly used in Dell Poweredge R310, T310, R320, R410, R415, T410, R510, R515, R520, T610, T620, R710, T710, R720, NX3000 and PowerVault MD1200, MD3200 Storage Arrays; Compaq Proliant® systems such as DL160 Gen8,DL320e Gen8, DL360e Gen8, DL360p Gen8, DL380e Gen8, DL380p Gen8, DL385p Gen8, ML310e Gen8, ML350e Gen8, ML350p Gen8, SL4540 Gen8, SL4545 Gen8