Andrew Childs bd61216f55 ec2/create-amis.sh: register root device as /dev/xvda ... For the case of blkfront drives, there appears to be no difference between /dev/sda1 and /dev/xvda: the drive always appears as the kernel device /dev/xvda. For the case of nvme drives, the root device typically appears as /dev/nvme0n1. Amazon provides the 'ec2-utils' package for their first party linux ("Amazon Linux"), which configures udev to create symlinks from the provided name to the nvme device name. This name is communicated through nvme "Identify Controller" response, which can be inspected with: nvme id-ctrl --raw-binary /dev/nvme0n1 | cut -c3073-3104 | hexdump -C On Amazon Linux, where the device is attached as "/dev/xvda", this creates: - /dev/xvda -> nvme0n1 - /dev/xvda1 -> nvme0n1p1 On NixOS where the device is attach as "/dev/sda1", this creates: - /dev/sda1 -> nvme0n1 - /dev/sda11 -> nvme0n1p1 This is odd, but not inherently a problem. NixOS unconditionally configures grub to install to `/dev/xvda`, which fails on an instance using nvme storage. With the root device name set to xvda, both blkfront and nvme drives are accessible as /dev/xvda, either directly or by symlink.		2019-11-02 05:58:58 +09:00
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scripts	ec2/create-amis.sh: register root device as /dev/xvda	2019-11-02 05:58:58 +09:00
option-usages.nix	mass replace "flip map -> forEach"	2019-08-05 14:03:38 +03:00