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How Does SRM Boot an OS?

April 26, 2017boot OS SRM

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How Does SRM Boot an OS?

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All versions of SRM can boot from SCSI disks and the versions for recent platforms, such as the Noname or AlphaStations can boot from floppy disks as well. Network booting via bootp is supported. Note that older SRM versions (notably the one for the Jensen) cannot boot from floppy disks. Booting from IDE devices is supported on newer platforms ( 164SX, 164LX, 164UX, DS20, DS10, DP264, UP2000(+), UP1000, UP1100 etc..). Booting Linux with SRM is a two step process: first, SRM loads and transfers control to the secondary bootstrap loader. Then the secondary bootstrap loader sets up the environment for Linux, reads the kernel image from a disk filesystem and finally transfers control to Linux. Currently, there are two secondary bootstrap loaders for Linux: the raw loader that comes with the Linux kernel and aboot which is distributed separately. These two loaders are described in more detail below.