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OpenBSD Installation and Upgrading Installing and upgrading OpenBSD. |
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OpenBSD LiveUSB
Can anybody share with me (jggimi you come first to my mind) your experience in creating LiveUSB image of the OpenBSD. I Google little bit and I saw how to on OpenBSD wiki pages. Without careful inspection I am concern that the described process doesn't take into account that USB stick is writable media unlike LIveCD. In another words 8Gb LiveUSB should be nothing else but removable SCSI hard drive. I want to be able
to add and remove packages and have 2GB of home space. I also saw that Jacek Artymiak is selling LiveUSB images of OpenBSD for something like 50 euros. Since he is very credible person I would imagine that LiveUSB image is not that difficult to create. Would a simple installation on the machine to which USB is attached before the boot work as long as I select SCSI drive instead regular HDD? I saw howtos for NetBSD and FreeBSD on line. OpenBSD should not be to different than NetBSD. Jggimi can you tell me little bit about those kernel changes in OpenBSD 4.5 which are making creating LiveCD easier? Finally, it looks also that I could use BoulFish http://www.kernel-panic.it/software/bowlfish/ script can be used. Any thoughts on that one? |
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Adding to jggimi's informative post, one problem you might encounter is geometry related.
When a system boots from USB, the BIOS will emulate a hard drive temporarily for real mode disk access.. this allows the MBR and the PBR code to read and write from/to the USB mass storage device. Sometimes this emulated device will have geometry that's different from what was determined via the umass/sd(4) probing, the side effect is the second stage loader cannot find /boot on some systems. (..you'll likely see "ERR M" if this is the case). I've only witnessed this on some older systems, but you might scratch your head wondering why the device boots on some systems.. but not others. Hope that helps. |
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FWIW, i386 & macppc platforms don't have this additional requirement. Copying from wd(4) to sd(4) works fine. Cylinder alignment is simply specific to Sun hardware done to improve performance. |
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