Date: Wed, 3 Dec 2014 10:22:56 +0100 From: =?utf-8?Q?Jos=C3=A9_Mar=C3=ADa_Alcaide?= <josemaria.alcaide@ehu.es> To: freebsd-fs@freebsd.org Subject: Using boot0 to redirect booting to another disk? Message-ID: <27E65CD9-4C97-4528-B218-A01EDB1B8CB1@ehu.es>
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Hi. I have an HP Proliant Microserver Gen8. Nice machine but picky BIOS. = When its hard disk controller is configured in SATA AHCI mode, there is = no way to choose the boot disk among those connected to the SATA ports. = I have four HDD attached to the backplane, and another drive connected = to a fifth SATA port originally intended for an optical drive. The four = HDD are arranged in a RAIDZ. Currently the machine is booting from an = USB flash device, but I would like to boot the FreeBSD installed on = fifth drive. The disk controller sees and reports the five disks just = fine, but as I said above, there is no way to choose the fifth disk as a = boot device. I wondered whether I could use boot0 to redirect the boot from a USB = flash device (pendrive or, still better, a microSD) to the fifth drive. = The idea comes from the fact that boot0 shows a "F5 - Drive 2" option = when it detects more than one drive. I tried to understand how boot0 = works reading its source code, and I experimented with the boot0cfg's = "-d disk" and "-o setdrv" options, to no avail. So I decided to ask for = help. :) Is that possible? Any help will be greatly appreciated. -- Jose M. Alcaide
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