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Vinícius Ferrão
27aaa960fa
The scan wrote each disk into a file named after the identifier it reported, wwn, path or neither, and read back the groups of one such file only. Two disks that reported different identifiers therefore never competed on their driver group: a disk without a WWN was dropped as soon as another disk reported one, and when the last disk scanned reported a WWN the readback opened the WWN files alone. A direct attached boot disk that reports no WWN thus lost to a RAID volume that reports one, which is the case the driver groups exist to decide. Write every disk into the file of its driver group and keep the identifier as the sort key inside that group, ranked so that a WWN sorts ahead of a path and a path ahead of no identifier. The driver group now decides first for every disk, the identifier still decides between disks of one group, and no disk is dropped from the scan.