IBM i series Handbook page 362

Internal Magnetic Media
#6650 1.96 GB Two-Byte Disk Unit
Provides a 3 ½-inch single disk unit with 1.96 GB capacity for additional disk storage.
#6652 1.03 GB Two-Byte Disk Unit
Provides a 3 ½-inch single disk unit with 1.03 GB capacity for additional disk storage.
#6713 8.58 GB Two-Byte Disk Unit (Ultra SCSI)
Provides a 3 ½-inch single disk unit with 8.58 GB capacity for additional disk storage.
#6714 17.54 GB Two-Byte Disk Unit (Ultra SCSI)
Provides a 3 ½-inch single disk unit with 17.54 GB capacity for additional disk storage.
#6717 Two-Byte 8.58 GB 10k RPM Disk Unit Ultra
These features provide 8.58 GB of disk capacity and Ultra SCSI interface. Requires an Ultra2
SCSI storage slot for best performance. This disk unit is not supported on disk controllers
#6502/#6512/#6530.
#6718 Two-Byte 17.54 GB 10k RPM Disk Unit Ultra
These features provide 17.54 GB of disk capacity and Ultra SCSI interface. Requires an
Ultra2 SCSI storage slot for best performance. This disk unit is not supported on disk
controllers #6502/#6512/#6530.
#6806 1.96 GB Two-Byte Disk Unit (Ultra SCSI)
Provides a 3 ½-inch single disk unit with 1.96 GB capacity for additional disk storage.
#6807 4.19 GB Two-Byte Disk Unit (Ultra SCSI)
Provides a 3 ½-inch single disk unit with 4.19 GB capacity for additional disk storage.
#6813 8.58 GB Two-Byte Disk Unit (Ultra SCSI)
Provides a 3 ½-inch single disk unit with 8.58 GB capacity for additional disk storage.
#6817 Two-Byte 8.58 GB 10k RPM Disk Unit Ultra
This feature provides 8.58 GB of high performance (10k RPM) disk capacity with an Ultra
SCSI (LVD) interface. This disk unit is not supported on disk controllers #6502/#6512/#6530.
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iSeries Handbook