What version of Irix can be installed on my SGI system? - by Jodeman
You should find out from SGI to see which version of Irix is licensed to be installed on your system.

Personal Iris
Irix 5.3 and lower

Crimson
Irix 6.2 and lower. This system is Y2K compliant with the proper patches installed.

Power Series
Irix 5.3 and lower

Indigo
R3000 Indigo systems - Irix 5.3 and lower
R4000 Indigo systems - Irix 6.5.x and lower

Indy
Irix 6.5.x and lower

NOTE: There are a few flavours of Irix 5.3 for Indy specialized for different speeds of Indy CPUs. (See below)

Irix 5.3 Versions for SGI Indy
By Ralf Beyer beyer.braunschweig@freenet.de

  • IRIX 5.3 for Indy 100MHz R4000PC
    812-0119-006, released 1/94
    Supported on IP4, IP5, IP7, IP9, IP12, IP17, IP19, IP20, IP22

  • IRIX 5.3 with XFS
    812-0323-001, released 12/94
    All platforms supported by IRIX 5.3 except IP4, IP6

  • IRIX 5.3 for Indy R4x00
    812-0336-002, released 8/95
    Indy/CHALLENGE S with 100MHz, 150MHz, 175MHz and 200Mhz R4000, R4400 and R4600 IP22

  • IRIX 5.3 for Indy Dual Head Graphics Upgrade Option
    812-0336-003, released 10/95
    Indy, CHALLENGE S with R4000, R4400 and R4600 IP22

  • IRIX 5.3 for Indy including R5000
    812-0336-004, released 02/96
    Shipped with all Indy and CHALLENGE S systems.

  • IRIX 5.3 XFS for Indy including R5000
    812-0336-005, released 5/96
    Supported on all Indy and CHALLENGE S systems.

Indigo2 / Challenge M / Power Indigo2
Irix 6.5.x and lower

NOTE: Depending on the CPU or graphics, you will need a different flavour of Irix 6.2 or Irix 5.3. There are some Indigo2 CPUs (200mhz & 250mhz) which have 2mb of Secondary Cache. In this case, you'll need to use the flavour of Irix 6.2 labeled (Irix 6.2 for Indigo2 IMPACT 10000) which supports 2mb of Secondary Cache. The SGI code for this Irix version is 813-0469-002 dated 06/96. If you install the normal "Vanilla" version of Irix 6.2 on a system with 2mb Secondary Cache, the system will do a nice core dump & crash if you perform certain functions on the system. There is also a flavour of Irix 5.3 which specifically supports 2mb of Secondary Cache.

If you install the normal "Vanilla" version of Irix 6.2 on a system with a 2mb Secondary Cache CPU, the system will do a nice core dump & crash if you perform certain functions on the system. There's also a flavour of Irix 5.3 which specifically supports 2mb of Secondary Cache.

O2
Irix 6.3
Irix 6.5.x

NOTE: The Irix 6.3 O/S was created specifically for the SGI O2 systems only. There have been rumours that it can be installed on an Indigo2 through a network but I've never tried it so I can't confirmed it.

Octane
Irix 6.4
Irix 6.5.x

The Recommended version is Irix 6.5.3 or later to support R12000 and correct bug fixes. (See installation guide for required versions verses system config)

Origin 200 / Origin 2000
Irix 6.4
Irix 6.5.x

NOTE: The Irix 6.4 O/S was created specifically for the Origin and Octane systems only.

The Recommended version is Irix 6.5.3 or later to support R12000 and correct bug fixes. (See installation guide for required versions verses system config)

Origin 2000 Rack
Irix 6.4 and Irix 6.5.x, these version require patches. Recommended version is Irix 6.5.8 to support R12000 and correct bug fixes. (See installation guide for required versions verses system config)

Challenge / Challenge DM / Challenge S
Irix 6.5.x and lower

Onyx
Irix 6.5.x and lower

NOTE: Irix 5.3 comes with only an option to install an EFS filesystem. There is a flavour of Irix 5.3 that supports the XFS filesystem but that version needs to be specifically ordered from SGI.

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