How to control order of disk devices during Ubuntu Linux installation?Choosing a device name under /dev from...
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How to control order of disk devices during Ubuntu Linux installation?
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I have an automated installation script (preseed file) for Ubuntu 18.04 which automatically partitions /dev/sda and /dev/sdb. I run this by booting from a USB drive, in "legacy BIOS" mode (so MBR is used). This worked fine on several machines so far - the hard drives are detected as sda and sdb, while the USB drive is sdc. However, on one particular server sda refers to the installation USB drive and the hard disks are sdb and sdc, so the automated partitioning fails.
Is there any way I can control this and make sure sda and sdb always refer to internal disks? Or is there any way I can force the installation USB drive to be "sdz" or something, which should have the same effect? Most of the advice I've found says "use UUIDs", but that won't help for an automated installation intended to work on many machines.
The boot order in the BIOS is set to boot from an internal hard disk first, but of course for the installation I have to override that (by pressing F11) to boot from the USB drive.
boot udev block-device
asked Feb 1 at 11:28
EM0EM0
1656 bronze badges
add a comment |
I have an automated installation script (preseed file) for Ubuntu 18.04 which automatically partitions /dev/sda and /dev/sdb. I run this by booting from a USB drive, in "legacy BIOS" mode (so MBR is used). This worked fine on several machines so far - the hard drives are detected as sda and sdb, while the USB drive is sdc. However, on one particular server sda refers to the installation USB drive and the hard disks are sdb and sdc, so the automated partitioning fails.
Is there any way I can control this and make sure sda and sdb always refer to internal disks? Or is there any way I can force the installation USB drive to be "sdz" or something, which should have the same effect? Most of the advice I've found says "use UUIDs", but that won't help for an automated installation intended to work on many machines.
The boot order in the BIOS is set to boot from an internal hard disk first, but of course for the installation I have to override that (by pressing F11) to boot from the USB drive.
boot udev block-device
asked Feb 1 at 11:28
EM0EM0
1656 bronze badges
1
You can find fitting udev environment variables for the USB device by looking through the output ofudevadm info -e, then edit your udev rule to useSUBSYSTEMS=="usb"and advise a specified device name. This is something you should look at: weininger.net/how-to-write-udev-rules-for-usb-devices.html
– eblock
Feb 1 at 11:46
add a comment |
I have an automated installation script (preseed file) for Ubuntu 18.04 which automatically partitions /dev/sda and /dev/sdb. I run this by booting from a USB drive, in "legacy BIOS" mode (so MBR is used). This worked fine on several machines so far - the hard drives are detected as sda and sdb, while the USB drive is sdc. However, on one particular server sda refers to the installation USB drive and the hard disks are sdb and sdc, so the automated partitioning fails.
Is there any way I can control this and make sure sda and sdb always refer to internal disks? Or is there any way I can force the installation USB drive to be "sdz" or something, which should have the same effect? Most of the advice I've found says "use UUIDs", but that won't help for an automated installation intended to work on many machines.
The boot order in the BIOS is set to boot from an internal hard disk first, but of course for the installation I have to override that (by pressing F11) to boot from the USB drive.
boot udev block-device
asked Feb 1 at 11:28
EM0EM0
1656 bronze badges
I have an automated installation script (preseed file) for Ubuntu 18.04 which automatically partitions /dev/sda and /dev/sdb. I run this by booting from a USB drive, in "legacy BIOS" mode (so MBR is used). This worked fine on several machines so far - the hard drives are detected as sda and sdb, while the USB drive is sdc. However, on one particular server sda refers to the installation USB drive and the hard disks are sdb and sdc, so the automated partitioning fails.
Is there any way I can control this and make sure sda and sdb always refer to internal disks? Or is there any way I can force the installation USB drive to be "sdz" or something, which should have the same effect? Most of the advice I've found says "use UUIDs", but that won't help for an automated installation intended to work on many machines.
The boot order in the BIOS is set to boot from an internal hard disk first, but of course for the installation I have to override that (by pressing F11) to boot from the USB drive.
boot udev block-device
boot udev block-device
asked Feb 1 at 11:28
EM0EM0
1656 bronze badges
asked Feb 1 at 11:28
EM0EM0
1656 bronze badges
asked Feb 1 at 11:28
EM0EM0
1656 bronze badges
asked Feb 1 at 11:28
EM0EM0
1656 bronze badges
asked Feb 1 at 11:28
EM0EM0
1656 bronze badges
1656 bronze badges
1
You can find fitting udev environment variables for the USB device by looking through the output ofudevadm info -e, then edit your udev rule to useSUBSYSTEMS=="usb"and advise a specified device name. This is something you should look at: weininger.net/how-to-write-udev-rules-for-usb-devices.html
– eblock
Feb 1 at 11:46
add a comment |
1
You can find fitting udev environment variables for the USB device by looking through the output ofudevadm info -e, then edit your udev rule to useSUBSYSTEMS=="usb"and advise a specified device name. This is something you should look at: weininger.net/how-to-write-udev-rules-for-usb-devices.html
– eblock
Feb 1 at 11:46
1
1
You can find fitting udev environment variables for the USB device by looking through the output of
udevadm info -e, then edit your udev rule to use SUBSYSTEMS=="usb" and advise a specified device name. This is something you should look at: weininger.net/how-to-write-udev-rules-for-usb-devices.html– eblock
Feb 1 at 11:46
You can find fitting udev environment variables for the USB device by looking through the output of
udevadm info -e, then edit your udev rule to use SUBSYSTEMS=="usb" and advise a specified device name. This is something you should look at: weininger.net/how-to-write-udev-rules-for-usb-devices.html– eblock
Feb 1 at 11:46
add a comment |
1 Answer
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My answer to
Udev rules for seemingly indistinguishable devices
might be helpful
answered 1 hour ago
Ian BoagIan Boag
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My answer to
Udev rules for seemingly indistinguishable devices
might be helpful
answered 1 hour ago
Ian BoagIan Boag
821 silver badge3 bronze badges
add a comment |
My answer to
Udev rules for seemingly indistinguishable devices
might be helpful
answered 1 hour ago
Ian BoagIan Boag
821 silver badge3 bronze badges
add a comment |
My answer to
Udev rules for seemingly indistinguishable devices
might be helpful
answered 1 hour ago
Ian BoagIan Boag
821 silver badge3 bronze badges
My answer to
Udev rules for seemingly indistinguishable devices
might be helpful
answered 1 hour ago
Ian BoagIan Boag
821 silver badge3 bronze badges
answered 1 hour ago
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821 silver badge3 bronze badges
answered 1 hour ago
Ian BoagIan Boag
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answered 1 hour ago
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You can find fitting udev environment variables for the USB device by looking through the output of
udevadm info -e, then edit your udev rule to useSUBSYSTEMS=="usb"and advise a specified device name. This is something you should look at: weininger.net/how-to-write-udev-rules-for-usb-devices.html– eblock
Feb 1 at 11:46