View source for History of OS/400

__FORCETOC__
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==
*[[Wikipedia:System/3]]
*[[Wikipedia:System/32]]
*[[Wikipedia:System/34]]
*[[Wikipedia:System/36]]

==LPPs==
{| style="position:relative; margin: 0 0 0.5em 1em; border-collapse: collapse; background:white; clear:right; text-align:center;" border="1" cellpadding="7"
! VersionRelease !! LPP
|-
| V6R1 
| 5761-SS1
|-
| V5R4 
| rowspan="4" | 5722-SS1
|-
| V5R3
|-
| V5R2<ref name="5722-SS1-V5R2andV5R1">[http://dhart.no-ip.info/iseries/AS400%20Processor%20Summary_files/..%5C5722-SS1%20IBM%20Operating%20System400%20(OS400)%20V5.htm 5722-SS1 IBM Operating System/400 (OS/400)]</ref>
|-
| V5R1<ref name="5722-SS1-V5R2andV5R1"/> 
|-
| V4R5 
| rowspan="5" | 5769-SS1
|-
| V4R4
|-
| V4R3
|-
| V4R2
|-
| V4R1 
|-
| V3R7 || 5716-SS1
|-
| V3R2
| rowspan="2" | 5763-SS1<ref name="5763-SS1">[http://dhart.no-ip.info/iseries/AS400%20Processor%20Summary_files/..%5C5763-SS1%20IBM%20Operating%20System400%20(OS400)%20Version%203.htm IBM Operating System/400 (OS/400) Version 3]</ref>
|-
| V3R1
|-
| V2R3
| rowspan="4" | 5738-SS1<ref name="5738-SS1">[http://dhart.no-ip.info/iseries/AS400%20Processor%20Summary_files/..%5C5738-SS1%20IBM%20Operating%20System400%20V2.htm 5738-SS1 IBM Operating System/400 V2]</ref>
|-
| V2R2
|-
| V2R1M1
|-
| V2R1M0
|-
| V1
| 5728-SS1<ref name="5728-SS1">[http://dhart.no-ip.info/iseries/AS400%20Processor%20Summary_files/..%5C5728-SS1%20IBM%20OPERATING%20SYSTEM400.htm 5728-SS1 IBM OPERATING SYSTEM/400]</ref>
|}

==Release history and life cycle==
{|style="position:relative; margin: 0 0 0.5em 1em; border-collapse: collapse;  background:white; clear:right; text-align:center;" border="1" cellpadding="7"
! Release 
! Announce<br>date 
! GA<br>date 
! Announce<br>end of<br>marketing 
! Effective<br>end of<br>marketing 
! End of<br>program<br>support 
! Program<br>support<br>extension<br>available
|-
| Rel 1 
|| 06/21/1988
|| 08/26/1988
|| || || ||
|-
| R01M00<br>aka V1R1M0
|| 
|| 
|| || || ||
|-
| R01M01<br>aka V1R1M1
|| 
|| 
|| || || ||
|-
| R01M02<br>aka V1R1M2
|| 06/21/1988 <ref name="R01M02">[http://archive.midrange.com/midrange-l/200708/msg01380.html ''Subject: Re: OS Release dates since V3R7''] from [[MIDRANGE-L]]</ref>
|| 11/25/1988
|| || || ||
|-
| R01M03<br>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<br>aka V3R0M5
|| 05/03/1994
|| 06/03/1994
|| 02/11/1997
|| 05/16/1997
|| 05/31/1997
||
|-
| V3R1
|| 05/03/1994<br>06/04/1995<ref name="5763-SS1"/>
|| 11/25/1994<br>06/30/1995<ref name="5763-SS1"/>
|| 02/11/1997
|| 05/16/1997<ref name="5763-SS1"/>
|| 10/31/1998<ref name="5763-SS1"/>
||
|-
| V3R2
|| 06/04/1996<ref name="5763-SS1"/>
|| 06/21/1996<ref name="5763-SS1"/>
|| 02/10/1998
|| 02/25/2000<ref name="5763-SS1"/>
|| 05/31/2000<ref name="5763-SS1"/>
||
|-
| 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
|| {{color|red|'''04/30/2009'''}}
||
|-
| V5R4
|| 01/31/2006
|| 02/14/2006
|| 
||
||
||
|-
| V6R1
|| 01/29/2008
|| 03/21/2008
||
||
||
||
|-
! Release 
! Announce<br>date 
! GA<br>date 
! Announce<br>end of<br>marketing 
! Effective<br>end of<br>marketing 
! End of<br>program<br>support 
! Program<br>support<br>extension<br>available
|}
*Source: <ref name="ReleaseLifeCycle">[http://www-03.ibm.com/servers/eserver/support/iseries/planning/upgrade/suptschedule.html Release life cycle]</ref>

==Current releases==
*[http://www-03.ibm.com/servers/eserver/support/iseries/planning/software/i5osschedule.html IBM i5/OS & OS/400 release support]

==Previous release support==
Values for TGTRLS parameter <ref name="TGTRLS">
{{Redbook
| pubnumber=sg249406
| title=IBM eServer iSeries Pocket Handbook: Version 5 Release 2 January 2003
}}</ref>
{|style="position:relative; margin: 0 0 0.5em 1em; border-collapse: collapse;  background:white; clear:right; text-align:left;" border="1" cellpadding="7"
!Installed<br>release !! *CURRENT !! *PRV !! Other valid values
|-
| V5R4 <ref name="V5R4TGTRLS">[http://publib.boulder.ibm.com/infocenter/iseries/v5r4/topic/books/sc415304.pdf PDF] Table 58 in Chapter 14 of V5R4 Backup and Recovery Guide SC41-5304-08</ref> || 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:  <ref name="OSLevelMapping">http://www-304.ibm.com/jct01004c/systems/support/i/planning/upgrade/osmapping.html</ref> - local copy last updated 15:21, 19 September 2008 (UTC)
<!---to show last update date above, use 5 tildes ~~~~~                     -->
<table width="600" cellspacing="0" border="0" cellpadding="0">
<tr>
<th width="600" class="v14-header-1">System i model to operating system level mapping</th>
</tr>
</table>
<!--start os level mapping table--> 
<table width="600" cellspacing="0" border="1" class="data-table-1" cellpadding="0" summary="This table contains information for System i RISC Model to OS Level Mapping">
<tr>
<th scope="col" align="left">Type</th>
<th scope="col" align="left">Model</th>
<th scope="col" align="middle">V3<br />
R6</th>

<th scope="col" align="middle">V3<br />
R7</th>
<th scope="col" align="middle">V4<br />
R1</th>
<th scope="col" align="middle">V4<br />
R2</th>
<th scope="col" align="middle">V4<br />
R3</th>
<th scope="col" align="middle">V4<br />

R4</th>
<th scope="col" align="middle">V4<br />
R5</th>
<th scope="col" align="middle">V5<br />
R1</th>
<th scope="col" align="middle">V5<br />
R2</th>
<th scope="col" align="middle">V5<br />
R3</th>

<th scope="col" align="middle">V5<br />
R4</th>
<th scope="col" align="middle">V6<br />
R1</th>
<th scope="col" align="middle">Next<br />
release</th>
</tr>

<tr>
<td align="left">9401</td>

<td align="left">150</td>
<td align="middle">&#160;</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>

<td align="middle">X</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
</tr>

<tr>
<td align="left">9406</td>
<td align="left">170</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">X</td>

<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
</tr>

<tr>
<td align="left">9406</td>
<td align="left">250</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>

<td align="middle">X</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
</tr>

<tr>
<td align="left">9406</td>
<td align="left">270</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>

<td align="middle">&#160;</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
</tr>

<tr>
<td align="left">9402</td>

<td align="left">400</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>

<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
</tr>

<tr>
<td align="left">9402</td>
<td align="left">436</td>
<td align="middle">&#160;</td>
<td align="middle">X</td>
<td align="middle">X</td>

<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
</tr>

<tr>
<td align="left">9406</td>
<td align="left">500</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>

<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
</tr>

<tr>
<td align="left">9402</td>
<td align="left">40S</td>
<td align="middle">X</td>

<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>

<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
</tr>

<tr>
<td align="left">9406</td>
<td align="left">50S</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>

<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
</tr>

<tr>
<td align="left">9406</td>

<td align="left">510</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>

<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
</tr>

<tr>
<td align="left">9407</td>
<td align="left">515</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>

<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
</tr>

<tr>
<td align="left">9407-M15</td>
<td align="left">Power 520</td>

<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">X&#185;</td>
<td align="middle">X</td>
<td align="middle">X</td>
</tr>

<tr>
<td align="left">9405</td>
<td align="left">520</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">X</td>

<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
</tr>

<tr>
<td align="left">9406</td>
<td align="left">520</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>

<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
</tr>

<tr>
<td align="left">9408-M25</td>

<td align="left">Power 520</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">X&#185;</td>
<td align="middle">X</td>
<td align="middle">X</td>

</tr>

<tr>
<td align="left">9406</td>
<td align="left">525</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>

<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
</tr>

<tr>
<td align="left">9406</td>
<td align="left">530</td>
<td align="middle">X</td>
<td align="middle">X</td>

<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>

</tr>

<tr>
<td align="left">9406</td>
<td align="left">53S</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>

<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
</tr>

<tr>
<td align="left">7998-60X</td>
<td align="left">JS12 Blade</td>

<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">X</td>
<td align="middle">X</td>
</tr>

<tr>
<td align="left">7998-61X</td>
<td align="left">JS22 Blade</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">X</td>

<td align="middle">X</td>
</tr>

<tr>
<td align="left">9406</td>
<td align="left">550</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>

<td align="middle">&#160;</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
</tr>

<tr>
<td align="left">9409-M50</td>
<td align="left">Power 550</td>
<td align="middle">&#160;</td>

<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">X&#185;</td>
<td align="middle">X</td>
<td align="middle">X</td>
</tr>

<tr>
<td align="left">9406</td>
<td align="left">570</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">X</td>
<td align="middle">X</td>

<td align="middle">X</td>
<td align="middle">X</td>
</tr>

<tr>
<td align="left">9406-MMA</td>
<td align="left">570</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>

<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">X&#185;</td>
<td align="middle">X</td>
<td align="middle">X</td>
</tr>

<tr>
<td align="left">9117-MMA</td>
<td align="left">Power 570</td>

<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">X&#185;</td>
<td align="middle">X</td>
<td align="middle">X</td>
</tr>

<tr>
<td align="left">9406</td>
<td align="left">595</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">X</td>

<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
</tr>

<tr>
<td align="left">9119-FHA</td>
<td align="left">Power 595</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>

<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">X&#185;</td>
<td align="middle">X</td>
<td align="middle">X</td>
</tr>

<tr>
<td align="left">9406</td>

<td align="left">600</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>

<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
</tr>

<tr>
<td align="left">9406</td>
<td align="left">620</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">X</td>
<td align="middle">X</td>

<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
</tr>

<tr>

<td align="left">9406</td>
<td align="left">640</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>

<td align="middle">X</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
</tr>

<tr>
<td align="left">9406</td>
<td align="left">650</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">X</td>

<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
</tr>

<tr>
<td align="left">9406</td>
<td align="left">720</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>

<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
</tr>

<tr>
<td align="left">9406</td>
<td align="left">730</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>

<td align="middle">&#160;</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
</tr>

<tr>
<td align="left">9406</td>
<td align="left">740</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>

<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
</tr>

<tr>
<td align="left">9406</td>
<td align="left">800</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>

<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">&#160;</td>
</tr>

<tr>

<td align="left">9406</td>
<td align="left">810</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>

<td align="middle">X</td>
<td align="middle">&#160;</td>
</tr>

<tr>
<td align="left">9406</td>
<td align="left">820</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">X</td>

<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
</tr>

<tr>
<td align="left">9406</td>
<td align="left">825</td>

<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">&#160;</td>

</tr>

<tr>
<td align="left">9406</td>
<td align="left">830</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">X</td>
<td align="middle">X</td>

<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
</tr>

<tr>
<td align="left">9406</td>
<td align="left">840</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>

<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
</tr>

<tr>
<td align="left">9406</td>
<td align="left">870</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">X</td>
<td align="middle">X</td>

<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">&#160;</td>
</tr>

<tr>
<td align="left">9406</td>
<td align="left">890</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>

<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">&#160;</td>
</tr>

<tr>
<td align="left">9406</td>

<td align="left">S10</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>

<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
</tr>

<tr>
<td align="left">9406</td>
<td align="left">S20</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">X</td>
<td align="middle">X</td>

<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
</tr>

<tr>

<td align="left">9406</td>
<td align="left">S30</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>

<td align="middle">X</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
</tr>

<tr>
<td align="left">9406</td>
<td align="left">S40</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">X</td>

<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
</tr>

<tr>
<td align="left">9406</td>
<td align="left">SB1</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>

<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
</tr>

<tr>
<td align="left">9406</td>
<td align="left">SB2</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>

<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
</tr>

<tr>
<td align="left">9406</td>
<td align="left">SB3</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">X</td>

<td align="middle">X</td>
<td align="middle">X</td>
<td align="middle">&#160;</td>
<td align="middle">&#160;</td>
</tr>
</table>
<!--end os level mapping table--> 
<p>&#185; Requires VxRxM5 mod level</p>

==i5/OS and OS/400 upgrade paths==
{|style="position:relative; margin: 0 0 0.5em 1em; border-collapse: collapse;  background:white; clear:right; text-align:center;" border="1" cellpadding="7"
!To:<br>From:
! V4R2
! V4R3
! V4R4
! V4R5
! V5R1
! V5R2
! V5R3
! V5R4
|-
| V4R1
|| {{color|green|Yes}}
|| {{color|green|Yes}}
|| {{color|green|Yes}}
|| {{color|green|Yes}}
|| 
|| 
|| 
|| 
|-
| V4R2
|| 
|| {{color|green|Yes}}
|| {{color|green|Yes}}
|| {{color|green|Yes}}
|| 
|| 
|| 
|| 
|-
| V4R3
|| 
|| 
|| {{color|green|Yes}}
|| {{color|green|Yes}}
|| 
|| 
|| 
|| 
|-
| V4R4
|| 
|| 
|| 
|| {{color|green|Yes}}
|| {{color|green|Yes}}
|| 
|| 
|| 
|-
| V4R5
|| 
|| 
|| 
|| 
|| {{color|green|Yes}}
|| {{color|green|Yes}}
|| 
|| 
|-
| V5R1
|| 
|| 
|| 
|| 
|| 
|| {{color|green|Yes}}
|| {{color|green|Yes}}
|| 
|-
| V5R2
|| 
|| 
|| 
|| 
|| 
|| 
|| {{color|green|Yes}}
|| {{color|green|Yes}}
|-
| V5R3
|| 
|| 
|| 
|| 
|| 
|| 
|| 
|| {{color|green|Yes}}
|-
|}
Source:  <ref name="UpgradePaths">{{Redpaper
| title=IBM System i Overview: Models 515, 525, 595, and More
| pubnumber=redp5052
}} ''12.3 i5/OS and OS/400 Upgrade Paths'' Publish Date 19 December 2007</ref>

==See also==
*[http://www-03.ibm.com/systems/i/hardware/life.html Hardware model availability] with charts

==References==
{{reflist}}

==Categories==
[[Category:OS/400]]
[[Category:History|OS/400]]