Boot disks order and informations

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Hi,

I have an issue difficult to deal with on a RHEL 7.5 entreprise Linux.
Here is the Oracleasm disks on my server, and after a reboot, it seems that boot disk order has changed causing some issue with the ASM disk.

First i want to know what is exactly thoses couples of numbers below:
8, 81
8, 97
8, 113

[root@myserver disks]# ls -l
total 0
brw-rw---- 1 oracle oinstall 8, 81 Feb 12 12:30 DATA
brw-rw---- 1 oracle oinstall 8, 97 Feb 12 12:30 FRA
brw-rw---- 1 oracle oinstall 8, 113 Feb 12 12:30 OCR

and if i can change the boot disk order manualy

Thanks all

CD

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