Re: [gentoo-user] Allow delay for booting from USB device?
On Friday 18 April 2014 12:02:01 Thomas Mueller wrote: Is there a way to make Gentoo or other Linux allow extra time when root is on a USB device? Any way to say just a second or more like 15 seconds before aborting with the message that root partition does not exist? In this case it's an IDE hard drive in a USB enclosure. FreeBSD seems to handle this situation better. I would get a mountroot prompt, to which I would respond ufs:/dev/ada0p3 and be good. I could avoid this situation with /boot/loader.conf legal.realtek.license_ack=1 rsu-rtl8712fw_load=YES kern.cam.scsi_delay=13000 # Delay (in ms) before probing SCSI kern.cam.boot_delay=16000# Delay (in ms) of root mount for CAM bus hint.re.0.disabled=1 but don't know if Linux has anything like this. Only lines 3 and 4 are relevant to this issue; other lines are for different issues. Tom Try adding rootdelay = 15 to the kernel commandline. This should make the kernel wait 15 seconds before trying to access the root- device. See: http://www.linuxtopia.org/online_books/linux_kernel/kernel_configuration/re58.html I used this myself in the past when booting from USB-devices. Kind regards, Joost
Re: [gentoo-user] Allow delay for booting from USB device?
On 4/18/2014 9:05 AM, Joost Roeleveld wrote: On Friday 18 April 2014 12:02:01 Thomas Mueller wrote: Is there a way to make Gentoo or other Linux allow extra time when root is on a USB device? Any way to say just a second or more like 15 seconds before aborting with the message that root partition does not exist? In this case it's an IDE hard drive in a USB enclosure. FreeBSD seems to handle this situation better. I would get a mountroot prompt, to which I would respond ufs:/dev/ada0p3 and be good. I could avoid this situation with /boot/loader.conf legal.realtek.license_ack=1 rsu-rtl8712fw_load=YES kern.cam.scsi_delay=13000 # Delay (in ms) before probing SCSI kern.cam.boot_delay=16000# Delay (in ms) of root mount for CAM bus hint.re.0.disabled=1 but don't know if Linux has anything like this. Only lines 3 and 4 are relevant to this issue; other lines are for different issues. Tom Try adding rootdelay = 15 to the kernel commandline. This should make the kernel wait 15 seconds before trying to access the root- device. See: http://www.linuxtopia.org/online_books/linux_kernel/kernel_configuration/re58.html I used this myself in the past when booting from USB-devices. Kind regards, Joost Tiny Core linux, which is primarily booted over usb, does something similar. If I'm understanding this right, they have a loop in their initrd that just waits a maximum of X seconds until it shows up. I'm not sure how easy this would be to move into something else. Lines 114-128: http://git.tinycorelinux.net/index.cgi?url=Core-scripts.git/tree/etc/init.d/tc-config
Re: [gentoo-user] Allow delay for booting from USB device?
On Friday 18 April 2014 10:01:35 Brian Hesdorfer wrote: On 4/18/2014 9:05 AM, Joost Roeleveld wrote: On Friday 18 April 2014 12:02:01 Thomas Mueller wrote: Is there a way to make Gentoo or other Linux allow extra time when root is on a USB device? Any way to say just a second or more like 15 seconds before aborting with the message that root partition does not exist? In this case it's an IDE hard drive in a USB enclosure. FreeBSD seems to handle this situation better. I would get a mountroot prompt, to which I would respond ufs:/dev/ada0p3 and be good. I could avoid this situation with /boot/loader.conf legal.realtek.license_ack=1 rsu-rtl8712fw_load=YES kern.cam.scsi_delay=13000 # Delay (in ms) before probing SCSI kern.cam.boot_delay=16000# Delay (in ms) of root mount for CAM bus hint.re.0.disabled=1 but don't know if Linux has anything like this. Only lines 3 and 4 are relevant to this issue; other lines are for different issues. Tom Try adding rootdelay = 15 to the kernel commandline. This should make the kernel wait 15 seconds before trying to access the root- device. See: http://www.linuxtopia.org/online_books/linux_kernel/kernel_configuration/r e58.html I used this myself in the past when booting from USB-devices. Kind regards, Joost Tiny Core linux, which is primarily booted over usb, does something similar. If I'm understanding this right, they have a loop in their initrd that just waits a maximum of X seconds until it shows up. I'm not sure how easy this would be to move into something else. Lines 114-128: http://git.tinycorelinux.net/index.cgi?url=Core-scripts.git/tree/etc/init.d/ tc-config rootdelay is a standard linux kernel option. No need to use a special script. -- Joost
Re: [gentoo-user] Allow delay for booting from USB device?
On 4/18/2014 1:38 PM, Joost Roeleveld wrote: On Friday 18 April 2014 10:01:35 Brian Hesdorfer wrote: On 4/18/2014 9:05 AM, Joost Roeleveld wrote: On Friday 18 April 2014 12:02:01 Thomas Mueller wrote: Is there a way to make Gentoo or other Linux allow extra time when root is on a USB device? Any way to say just a second or more like 15 seconds before aborting with the message that root partition does not exist? In this case it's an IDE hard drive in a USB enclosure. FreeBSD seems to handle this situation better. I would get a mountroot prompt, to which I would respond ufs:/dev/ada0p3 and be good. I could avoid this situation with /boot/loader.conf legal.realtek.license_ack=1 rsu-rtl8712fw_load=YES kern.cam.scsi_delay=13000 # Delay (in ms) before probing SCSI kern.cam.boot_delay=16000# Delay (in ms) of root mount for CAM bus hint.re.0.disabled=1 but don't know if Linux has anything like this. Only lines 3 and 4 are relevant to this issue; other lines are for different issues. Tom Try adding rootdelay = 15 to the kernel commandline. This should make the kernel wait 15 seconds before trying to access the root- device. See: http://www.linuxtopia.org/online_books/linux_kernel/kernel_configuration/r e58.html I used this myself in the past when booting from USB-devices. Kind regards, Joost Tiny Core linux, which is primarily booted over usb, does something similar. If I'm understanding this right, they have a loop in their initrd that just waits a maximum of X seconds until it shows up. I'm not sure how easy this would be to move into something else. Lines 114-128: http://git.tinycorelinux.net/index.cgi?url=Core-scripts.git/tree/etc/init.d/ tc-config rootdelay is a standard linux kernel option. No need to use a special script. -- Joost Agreed! Hadn't heard of that option until you mentioned it. Learn a new thing everyday :)
