History of OS/400

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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 6.1" and was released to general availability on March 26, 2008.

Predecessors

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[1]
V3R1

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 [2] 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 11/25/1994 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
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

Current releases

Previous release support

Values for TGTRLS parameter [4]

Installed
release 		*CURRENT *PRV Other valid values
V5R4 [5] 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: [6] - local copy last updated 06:22, 6 March 2008 (CST)
System i Model to OS Level Mapping
Type Model V3R6 V3R7 V4R1 V4R2 V4R3 V4R4 V4R5 V5R1 V5R2 V5R3 V5R4 V6R1
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        
9406 50S X X X X X X X X        
9406 510 X X X X X X X X        
9407 515                     X X
9405 520                   X* X X
9406 520                   X* X X
9406 525                     X X
9406 530 X X X X X X X X        
9406 53S X X X X X X X X        
9406 550                   X* X X
9406 570                   X* X X
9406 570 P6                     X* X
9406 595                   X* 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  

* requires VxRxM5 mod level

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: [7]

See also

References

  1. ↑ IBM Operating System/400 (OS/400) Version 3
  2. ↑ Subject: Re: OS Release dates since V3R7 from MIDRANGE-L
  3. ↑ Release life cycle
  4. ↑ PDF of IBM eServer iSeries Pocket Handbook: Version 5 Release 2 January 2003 (sg249406) at IBM Redbooks
  5. ↑ PDF Table 58 in Chapter 14 of V5R4 Backup and Recovery Guide SC41-5304-08
  6. ↑ http://www-304.ibm.com/jct01004c/systems/support/i/planning/upgrade/osmapping.html
  7. ↑ PDF of IBM System i Overview: Models 515, 525, 595, and More (redp5052) at IBM Redpapers 12.3 i5/OS and OS/400 Upgrade Paths Publish Date 19 December 2007

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