Stefan Monnier wrote: > > That makes 3½" form factor even more dead than I thought (two 4TB 2½" > drives should offer better performance than one 8GB 3½" drive and use > less space, not sure about power consumption).
Erm. You just doubled your failure rate. There are times when that's worthwhile, but if you want performance, SSDs are a better way of getting to it. > I wonder what kind of drives are used nowadays in big datacenters (and > whether the prices they pay for them looks anything like the ones > above). I think my company is in the medium-sized datacenter group. We use 8-14TB 3.5" spinning disks at prices pretty similar to what you've got above, and 0.5-8TB SSDs at prices... above what you've got below, but not breathtakingly more expensive. ext4 on MD RAID1 and 10, ZFS in equivalents. > For completeness, here's the list for SSDs: > > ½TB $ 60 2½" SSD 120 $/TB > 1TB $100 2½" SSD 100 $/TB > 2TB $244 2½" SSD 122 $/TB > 4TB $540 2½" SSD 135 $/TB > > so about 4x the price per TB (and here the linear price curve makes > a lot more sense). -dsr-