57 lines
2.0 KiB
Plaintext
57 lines
2.0 KiB
Plaintext
.\" $NetBSD: prep,v 1.6 2005/03/01 00:23:59 sekiya Exp $
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.
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First and foremost, before beginning the installation process,
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.Em make sure you have a reliable backup
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of any data (e.g., an old IRIX installation) you wish to preserve.
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.Pp
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Booting
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.Nx*M
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for the first time is most commonly done from the network.
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You must set up DHCP, TFTP, and possibly NFS for the installation
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procedure to be successful.
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Although newer SGI bootproms can read ELF kernels directly from the
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network, others require that you boot an ECOFF version of the kernel.
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Attempting to boot an ELF kernel on a system with a PROM that only
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supports ECOFF binaries will result in the following message being
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displayed by the PROM:
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.Pp
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.Dl Illegal f_magic number 0x7f45, expected MIPSELMAGIC or MIPSEBMAGIC.
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.Pp
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You can convert the standard ELF
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format kernel into an ECOFF kernel using the
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.Pa objcopy
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tool.
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.Pp
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.\" Different SGI hardware will require the executable code in the loadable
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.\" image to start at a different address.
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.\" You must decide which image your system is capable of loading.
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.\" The current options are:
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.\" .(bullet
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.\" Indigo2, Indy, Challenge M, Challenge S
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.\" .It
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.\" O2
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.\" .bullet)
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.\" .Pp
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.\" Additionally there may be a third type in the future for 64bit machines.
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.\" From now on this document assumes you are familiar with selecting the
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.\" correct image for your system.
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.Pp
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Note that some older bootproms have an interesting bug in reading the
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kernel via TFTP.
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They handle the port number as a signed entity, and
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can thus not connect to ports >32767.
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You can work around this problem on the TFTP server
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(given that it is a NetBSD host) by using
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.Dq sysctl
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to set
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.Dq net.inet.ip.anonportmin
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and
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.Dq net.inet.ip.anonportmax
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to more suitable values. For example:
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.Pp
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.Dl # Ic sysctl -w net.inet.ip.anonportmin=16384
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.Dl # Ic sysctl -w net.inet.ip.anonportmax=32767
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.Pp
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.\" The O2 internal MACE Ethernet chip isn't supported yet, so to boot the O2
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.\" and mount nfsroot, you will need an external NIC in the PCI slot.
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