Ralf Ramge wrote: > Richard Elling wrote: > >>> Yes, you're right. But sadly, in the mentioned scenario of having >>> replaced an entire drive, the entire disk is rewritten by ZFS. >> >> No, this is not true. ZFS only resilvers data. > > Okay, I see we have a communication problem here. Probably my fault, I > should have written "the entire data and metadata". > I made the assumption that a 1 TB drive in a X4500 may have up to 1 TB > of data on it. Simply because nobody buys the 1 TB X4500 just to use > 10% of the disk space, he would have bought the 250 GB, 500 GB or 750 > GB model then.
Actually, they do :-) Some storage vendors insist on it, to keep performance up -- short-stroking. I've done several large-scale surveys of this and the average usage is 50%. This is still a large difference in resilver times between ZFS and SVM. > In any case and any disk size scenario, that's something you don't > want to have on your network if there's a chance to avoid this. Agree 100%. -- richard _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
