On Mon, 27 Mar 2017 17:32:53 -0600 Adam Carheden wrote: > What's the biggest PMR disk I can buy, and how do I tell if a disk is PMR? > > I'm well aware that I shouldn't use SMR disks: > http://ceph.com/planet/do-not-use-smr-disks-with-ceph/ > > But newegg and the like don't seem to advertise SMR vs PMR and I can't > even find it on manufacturer's websites (at least not from Seagate). > You need to work on your google/website scouring foo. http://www.seagate.com/enterprise-storage/hard-disk-drives/archive-hdd/#features Clearly says SMR there, I would assume "archive" is a good hint, too. > Is there any way to tell? Is there a rule of thumb, such "as 4T+ is > probably SMR" or "enterprise usually means PMR"? > Size isn't conclusive, enterprise and non-archive more so. http://www.seagate.com/enterprise-storage/hard-disk-drives/enterprise-capacity-3-5-hdd/ "Proven conventional PMR technology backed by highest field reliability ratings and an MTBF of 2M hours" HTH, Christian -- Christian Balzer Network/Systems Engineer chibi@xxxxxxx Global OnLine Japan/Rakuten Communications http://www.gol.com/ _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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