3.5inx1.0in LFF Hard Drive. 4.7 / 5.3.
SCSI LVD U320 - 320MBps 16-bit. One of a number of lots of cleared disks. Mostly labelled as Sun parts (3900109-02). Used to be part of a disk array, now surplus to requirements.
All drives have been low-level formatted/verified from an Adaptec SCSI card and passed without issue.