IBM i Series Handbook

Externally Attached Automated Libraries 373
Externally Attached Automated Libraries
Installing more than one Ultrium drive on a SCSI bus may impact system performance. For
optimal performance, IBM recommends that no more than two IBM Ultrium drives be attached
to an individual SCSI bus.
There is a limit of one drive per IOP. However, according to Informational APAR II12621, you
can plan according to the projections in this table.
The 3580 has a data transfer rate of 15 MB per second uncompressed, with up to 30 MB per
second with a 2:1 compression. This media is not compatible with 3480, 3490, 3570, or 3590
drives.
Additional information about performance can be found in the
AS/400 Performance
Capabilities Reference
, SC41-0607, at:
http://publib.boulder.ibm.com/pubs/html/as400/online/chgfrm.htm
IBM 3580 Ultrium Tape Drive Model H11
The IBM 3580 Ultrium Tape Drive is a stand-alone, high-capacity tape drive. It uses the IBM
Ultrium tape cartridges to provide 100 GB native (uncompressed) capacity and up to 200 GB
with 2:1 hardware controlled data compression.
IBM 3581 Ultrium Tape Autoloader H17
The IBM 3581 Ultrium Tape Autoloader is a stand-alone or rack-mounted autoloader that
incorporates the IBM Ultrium Tape Drives. The 3581 is designed for easy, unattended
operation and can be operated in sequential mode as a single device or random-access
mode as two devices. Switching between single and random-access mode requires an IOP
reset be done to access the new configuration.
IOP or IOA Transfer Rate/User Mix of Data
#2729 IOA PCI Magnetic Media Controller
HVD, HD68
Up to 13 MB/s (47 GB/hr)
Aggregate sustained data rates up to 108 GB/hour
#6501 Magnetic Media Subsystem Controller IOP (SPD)
HVD: Requires #2895 interposer. Further limitations may
apply. See announcement for details.
Up to 17 MB/s (60 GB/hr)
Aggregate sustained data rates up to 108 GB/hour
#6534 Magnetic Media Controller (SPD)
HVD, HD68
Up to 17 MB/s (60 GB/hr)
Aggregate sustained data rates up to 108 GB/hour
#2749 IOA PCI Ultra Magnetic Media Controller HVD, HD68
OS/400 V4R5
Up to 38 MB/s
Aggregate sustained data rates up to 108 GB/hour
#2765 PCI Fiber Channel Tape Controller (3584/3584 only) Up to 100 MB/s

IBM i Series Specifications

General

Operating System	IBM i
Form Factor	Rack, Tower
Storage	SSD and HDD options
Security	compliance
Virtualization	IBM PowerVM
CPU	POWER processors
Scalability	Scale-up