So, understanding that the T10 VPD Binary Device Identifier is what is given to an initiator as the scsi id of the device, shouldn't this identifier be 100% persistent and consistent across reboots (or any other operation) of target server, etc? I am looking at data here, using /dev/disk/by-id/ listings of all my initiators where the contents of that directory are completely different from one boot of the target servers to another. Before reboot: lrwxrwxrwx 1 root root 9 Oct 9 21:54 /dev/disk/by-id/scsi-36001405308c88e9d999fd4deddbfe3d1 lrwxrwxrwx 1 root root 9 Oct 9 21:53 /dev/disk/by-id/scsi-3600140562c4a50cdf918d4a90dadc8de lrwxrwxrwx 1 root root 9 Oct 9 21:54 /dev/disk/by-id/scsi-360014058da4cbf2d90f3d4404d962ed8 lrwxrwxrwx 1 root root 9 Oct 9 21:54 /dev/disk/by-id/scsi-36001405cfec437dd2d09d4707da17eda lrwxrwxrwx 1 root root 9 Oct 9 21:54 /dev/disk/by-id/scsi-36001405f1c9b68fd99c4d4e4ddb9c7d3 lrwxrwxrwx 1 root root 9 Oct 9 15:32 /dev/disk/by-id/scsi-36001405fa093a96d41d7d4b85dadaadc After reboot: lrwxrwxrwx 1 root root 9 Oct 10 10:24 /dev/disk/by-id/scsi-360014051ceb80a6d86ccd4ec0dbb1ddc lrwxrwxrwx 1 root root 9 Oct 10 10:24 /dev/disk/by-id/scsi-360014054c23596ad0b46d421ad9791d3 lrwxrwxrwx 1 root root 9 Oct 10 10:24 /dev/disk/by-id/scsi-3600140562129c33da0d6d4968dae25d3 lrwxrwxrwx 1 root root 9 Oct 10 10:24 /dev/disk/by-id/scsi-36001405d1f2349bd8bb2d4e56d9ce2d0 lrwxrwxrwx 1 root root 9 Oct 10 10:24 /dev/disk/by-id/scsi-36001405ede216c8d78f1d4777d8e29d2 lrwxrwxrwx 1 root root 9 Oct 9 15:32 /dev/disk/by-id/scsi-36001405fa093a96d41d7d4b85dadaadc Notice though that one of the six disks did manage to maintain it's identifier, but the other 5 all changed. Should this really be possible? I wouldn't think it should be. Is there any situation at all (i.e. have I gotten something misconfigured) where this can be expected? Thoughts? b.
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