Anton B. Rang wrote:
Is this because C would already have a devid? If I insert an unlabeled disk, what happens? What if B takes five minutes to spin up? If it never does?
N.B. You get different error messages from the disk. If a disk is not ready then it will return a not ready code and the sd driver will record this and patiently retry. The reason I know this in some detail is scar #523, which was inflicted when we realized that some/many/most RAID arrays don't do this. The difference is that the JBOD disk electronics start very quickly, perhaps a few seconds after power-on. A RAID array can take several minutes (or more) to get to a state where it will reply to any request. So, if you do not perform a full, simultaneous power-on test for your entire (cluster) system, then you may not hit the problem that the slow storage start makes Solaris think that the device doesn't exist -- which can be a bad thing for highly available services. Yes, this is yet another systems engineering problem. -- richard _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
