January 24, 201412 yr http://www.newegg.com/Product/Product.aspx?Item=N82E16822145912&nm_mc=EMC-IGNEFL012414&cm_mmc=EMC-IGNEFL012414-_-EMC-012414-Index-_-InternalHardDrives-_-22145912-L03B EMCPWHF95
January 25, 201412 yr Good price; VERY reliable drive; and a good choice. But as near as I can determine, this is still an 800GB/platter 5TB drive, so it's sustained data rate won't be any better than the slower NAS units that have higher density 1TB platters. I don't believe anyone is shipping a 7200rpm 4TB drive with 1TB platters.
January 27, 201412 yr Checked the platter capacity databases I'm aware of, and confirmed this is not a 1TB/platter drive. As near as I can tell, the only 1TB/platter 7200rpm drives currently shipping are the Seagate SV35 series drives, which are available in 1TB, 2TB, and 3TB versions -- but NOT in a 4TB unit.
January 27, 201412 yr Author Still ... it is 4TB, NAS, and HGST. Has to be worth something even if it isn't 1TB/platter. I'll admit I didn't buy one myself but that was only because I don't NEED one and regardless of platter size, I can wait till prices drop even further and intersect with my need vs. my want.
January 27, 201412 yr Certainly agree ... it's a good drive and likely very reliable. Just wanted to note that it's not going to be as fast as some may expect when buying a 7200rpm drive, due to its lower areal density relative to modern NAS units with 1TB platters. A 5900rpm Seagate NAS will outperform this drive in sustained transfers, and that's not what many would expect when buying a 7200rpm unit.
January 27, 201412 yr Author 100% agree. Though I do wonder if it might not be helpful as a parity drive due to the way parity has to be read and then written. I know this has been discussed plenty before, I just can't remember the conclusion.
January 27, 201412 yr A 7200rpm drive will provide some benefit as the parity drive IF you're doing multiple writes at once from different clients, since the access time is better. For single writes it's not likely to matter, unless all the other drives are also 7200rpm units. For parity syncs, parity checks, and drive rebuilds -- where the limiting factor is the sustained transfer rate -- the 7200rpm drive won't help ... in fact it may marginally limit the speed, depending on which NAS you compare it to. [it's slightly slower than a 5900rpm unit; a bit faster than a 5400rpm unit] Bottom line: If you want the higher performance of 7200rpm units, the best approach is to use the new SV35 series Seagates for your entire array. This does, however, limit you to a max drive size of 3TB.
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