You're right - of course - about the man pages. Only, if you're new to this, it's not always evident to determine what constitutes "unwanted detail". Thanks for explaining.
Kind regards,
Herta
Neil Brown wrote:
On Thursday May 15, herta.vandeneynde@cc.kuleuven.ac.be wrote:
When I run "mdadm --detail --scan", the command outputs information about the devices in the array on a separate line:
# mdadm --detail --scan ARRAY /dev/md3 level=raid0 num-devices=3 UUID=fc5d996b:15107473:e3e819c9:6829a450 devices=/dev/md0,/dev/md1,/dev/md2 ARRAY /dev/md2 level=raid1 num-devices=2 UUID=32d034b8:e93cc8c7:f6335e14:829aefee devices=/dev/sde,/dev/sdh ARRAY /dev/md1 level=raid1 num-devices=2 UUID=4efa3017:9dc3fa9b:6f4acac4:e1944bec devices=/dev/sdd,/dev/sdg ARRAY /dev/md0 level=raid1 num-devices=2 UUID=1d078c62:2b90a2c3:1ec1d0af:75600395 devices=/dev/sdc,/dev/sdf
1. When I redirect this output to '/etc/mdadm.conf, should I then
edit the file to join the line listing the devices to the one
defining the ARRAY?
Only if you want to. mdadm is happy with continuing a line in the next line if it is indented.
2. Should the devices tag be there at all? sd[c-e] are on a
separate bus from sd[f-h]. If I add more devices to the first bus,
sd[f-h] will be renamed. Won't that confuse the md driver?
No, the device tag normally is not needed. I think the man page makes a point of saying that the output of --detail --scan is only the starting point of an mdadm.conf. You need to edit it based on how your system is managed. In some cases, e.g. ide drives, a devices entry is a good idea. In most cases, and particularly with SCSI it isn't.
3. should I add /dev/md[0-2] as DEVICE in /etc/mdstat.conf?
Yes.
NeilBrown
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