PN: ST31000424SS. Seagate 1TB 6G SAS 3.5" Server Hard Drive. SAS (not SATA) - NOT FOR USE IN DESKTOP/laptop/NAS COMPUTERS. SAS (not SATA) - NOT FOR USE IN DESKTOP/laptop COMPUTERS. These have been formatted to workin servers (Dell, HP, Supermicro Etc) and generic storage arrays.
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