On Fri 22 Jan 2021 at 08:06:37 (+0100), steve wrote: > Le 21-01-2021, à 20:41:05 -0600, David Wright a écrit : > > > I always archive the output of udevadm for my disks (actually > > I just copy the /run/udev/data/b8\:* files). > > I don't understand.
I keep a log for each of my hard drives, its acquisition, SMART history, partitioning, filesystems, usage, problems, etc. At the end of my opinions come the facts, the output of udevadm info --query=all --name=/dev/sdX and udevadm info --query=all --name=/dev/sdXN for all N. By that means, I have information available for a drive even when its host is powered off, or the drive is in storage. When I edit said log file on the system that it attaches to, I could update all the udevadm information by removing the old version and then appending it again by running udevadm several times. But instead I usually copy in the appropriate subset of files /run/udev/data/b8\:* that contain almost all the same information, just for convenience as I'm already in an editor. Here's a small sample (pruned with grep) of that information being obtained from each of those sources: $ for j in '' 1 2 3 4 5 6 ; do udevadm info --query=all --name=/dev/sda$j ; done | grep -e 'ID_FS_UUID=' E: ID_FS_UUID=9a3fa215-a749-47f4-a33e-5708097634b2 E: ID_FS_UUID=10358228-7f4b-49ec-8864-2547e27bccdb E: ID_FS_UUID=33c3cbeb-ee4b-4a21-9899-49e546f024de E: ID_FS_UUID=98f15f4c-e3fc-45f3-aa15-3774e012e996 $ $ grep -e 'ID_FS_UUID=' /run/udev/data/b8\:? /run/udev/data/b8:3:E:ID_FS_UUID=9a3fa215-a749-47f4-a33e-5708097634b2 /run/udev/data/b8:4:E:ID_FS_UUID=10358228-7f4b-49ec-8864-2547e27bccdb /run/udev/data/b8:5:E:ID_FS_UUID=33c3cbeb-ee4b-4a21-9899-49e546f024de /run/udev/data/b8:6:E:ID_FS_UUID=98f15f4c-e3fc-45f3-aa15-3774e012e996 $ > > Does mdadm have a > > equivalent manner of displaying its configuration? Not having used it, I wondered whether mdadm could effortlessly "brain-dump" in a similar manner to either of these methods. Cheers, David.
