History of OS/400

The operating system, like the hardware of the midrange family, has changed significantly since its release on August 26, 1988 as OS/400 Release 1. The latest version is known officially as "IBM i 7.1" and was released to general availability on April 23, 2010.

Predecessors

• Wikipedia:System/3
• Wikipedia:System/32
• Wikipedia:System/34
• Wikipedia:System/36

LPPs

VersionRelease	LPP
V6R1	5761-SS1
V5R4	5722-SS1
V5R3
V5R2
V5R1
V4R5	5769-SS1
V4R4
V4R3
V4R2
V4R1
V3R7	5716-SS1
V3R2	5763-SS1
V3R1
V2R3	5738-SS1
V2R2
V2R1M1
V2R1M0
V1	5728-SS1

Release history and life cycle

Release	Announce date	GA date	Announce end of marketing	Effective end of marketing	End of program support	Program support extension available
Rel 1	06/21/1988	08/26/1988
R01M00 aka V1R1M0
R01M01 aka V1R1M1
R01M02 aka V1R1M2	06/21/1988	11/25/1988
R01M03 aka V1R1M3
V2R1	04/22/1991	05/24/1991		03/12/1993	06/30/1994
V2R1.1	04/22/1991	03/06/1992		03/12/1993	06/30/1994
V2R2	02/18/1992	09/18/1992		09/16/1994	03/31/1995
V2R3	02/16/1993	12/17/1993		12/29/1995	05/31/1996
R7.5 SSP	02/20/1996	03/08/1996	02/09/1999	02/25/2000	05/31/2000
V3R0.5 aka V3R0M5	05/03/1994	06/03/1994	02/11/1997	05/16/1997	05/31/1997
V3R1	05/03/1994 06/04/1995	11/25/1994 06/30/1995	02/11/1997	05/16/1997	10/31/1998
V3R2	06/04/1996	06/21/1996	02/10/1998	02/25/2000	05/31/2000
V3R6	06/21/1995	12/22/1995	08/19/1997	11/21/1997	10/31/1998
V3R7	09/03/1996	11/08/1996	09/01/1998	12/01/1998	06/30/1999
V4R1	08/19/1997	08/29/1997	02/09/1999	02/25/2000	05/31/2000
V4R2	02/10/1998	02/27/1998	02/09/1999	02/25/2000	05/31/2000	01/31/2001
V4R3	09/01/1998	09/11/1998	02/15/2000	12/29/2000	01/31/2001
V4R4	02/09/1999	05/21/1999	02/13/2001	05/31/2001	05/31/2001	11/30/2001
V4R5	05/22/2000	07/28/2000	02/12/2002	07/02/2002	07/31/2002	12/31/2002
V5R1	04/23/2001	05/25/2001	07/29/2003	11/21/2003	09/30/2005
V5R2	06/04/2002	08/30/2002	02/08/2005	10/01/2005	04/30/2007
V5R3	05/04/2004	06/11/2004	02/06/2007	01/04/2008	04/30/2009
V5R4	01/31/2006	02/14/2006	01/27/2009	01/07/2011
V6R1	01/29/2008	03/21/2008
Release	Announce date	GA date	Announce end of marketing	Effective end of marketing	End of program support	Program support extension available

• Source:

Current releases

• IBM i5/OS & OS/400 release support

Previous release support

Values for TGTRLS parameter

Installed release	*CURRENT	*PRV	Other valid values
V5R4	V5R4M0	V5R3M0	V5R2M0
V5R3	V5R3M0	V5R2M0	V5R1M0 V5R2M0 V5R3M0
V5R2	V5R2M0	V5R1M0	V4R5M0 V5R1M0 V5R2M0
V5R1	V5R1	V4R5	V4R4M0 V4R5M0 V5R1M0
V4R5	V4R5M0	V4R4M0	V3R2M0 V4R2M0 V4R3M0 V4R4M0 V4R5M0
V4R4	V4R4	V4R3	V4R2 V3R2
V4R3	V4R3	V4R2	V4R1 V3R7 V3R2
V4R2	V4R2M0	V4R1M0	V3R2M0 V3R7M0 V4R1M0 V4R1M4 V4R2M0

iSeries - AS/400 RISC Model to OS Level Mapping

• Source: 15:22, 13 April 2010 (UTC)

 Power and System i model to operating system level mapping

Type	Model	V3 R6	V3 R7	V4 R1	V4 R2	V4 R3	V4 R4	V4 R5	V5 R1	V5 R2	V5 R3	V5 R4	6.1	7.1
9401	150		x	x	x	x	x	x	x	x
9406	170				x	x	x	x	x	x	x
9406	250							x	x	x	x
9406	270							x	x	x	x	x
9402	400	x	x	x	x	x	x	x	x
9402	436		x	x	x	x	x	x	x
9406	500	x	x	x	x	x	x	x	x
9402	40S	x	x	x	x	x	x	x	x
9406	50S	x	x	x	x	x	x	x	x
9406	510	x	x	x	x	x	x	x	x
9407	515											x	x	x
9407-M15	Power 520											x1	x	x
9405	520										x	x	x	x
9406	520										x	x	x	x
9408-M25	Power 520											x1	x	x
9406	525											x	x	x
9406	530	x	x	x	x	x	x	x	x
9406	53S	x	x	x	x	x	x	x	x
7998-60X	JS12 Blade												x	x
7998-61X	JS22 Blade												x	x
8203-E4A	Power 520											x1	x	x
8204-E8A w/ 3.5GHz or 4.2GHz processors	Power 550											x1	x	x
8204-E8A w/ 5.0GHz processor	Power 550												x	x
8233-E8B	Power 750												x2	x
8234-EMA	Power 560												x	x
9406	550										x	x	x	x
9409-M50	Power 550											x1	x	x
9406	570										x	x	x	x
9406-MMA	570											x1	x	x
9117-MMA	Power 570											x1	x	x
9117-MMB	Power 770												x2	x
9179-MHB	Power 780												x2	x
9406	595										x	x	x	x
9119-FHA	Power 595											x1	x	x
9406	600			x	x	x	x	x	x	x
9406	620			x	x	x	x	x	x	x
9406	640			x	x	x	x	x	x	x
9406	650			x	x	x	x	x	x	x
9406	720					x	x	x	x	x	x
9406	730					x	x	x	x	x	x
9406	740					x	x	x	x	x	x
9406	800									x	x	x	x
9406	810									x	x	x	x
9406	820							x	x	x	x	x
9406	825									x	x	x	x
9406	830							x	x	x	x	x
9406	840							x	x	x	x	x
9406	870									x	x	x	x
9406	890									x	x	x	x
9406	S10			x	x	x	x	x	x	x
9406	S20			x	x	x	x	x	x	x
9406	S30			x	x	x	x	x	x	x
9406	S40			x	x	x	x	x	x	x
9406	SB1			x	x	x	x	x	x	x
9406	SB2							x	x	x	x	x
9406	SB3							x	x	x	x	x

¹ VxRxM5 of the Licensed Internal Code is required on the indicated models. Other models which support the release can utilize VxRxM5 LIC in place of VxRxM0 LIC, but it will not provide any functional advantage.

² Release 6.1.1 of the Licensed Internal Code is required.

i5/OS and OS/400 upgrade paths

To: From:	V4R2	V4R3	V4R4	V4R5	V5R1	V5R2	V5R3	V5R4
V4R1	Yes	Yes	Yes	Yes
V4R2		Yes	Yes	Yes
V4R3			Yes	Yes
V4R4				Yes	Yes
V4R5					Yes	Yes
V5R1						Yes	Yes
V5R2							Yes	Yes
V5R3								Yes

Source:

See also

• Hardware model availability with charts

External links

• Future
  • "The i/OS Roadmap Revealed--Sort Of" by Timothy Prickett Morgan in Volume 19, Number 6 of The Four Hundred on February 8, 2010