I got an external USB3 8TB disk from Costco, namely the STEL8000401 Seagate Backup Plus Hub, the enclosure includes a USB3 HUB, and an 8TB 3.5 inch hard drive inside<\/p>\n\n\n\n
upon opening the shell, I was presented with an 8TB SATA 3 6Gb\/s drive with the model number ST8000DM004<\/p>\n\n\n\n
According to the datasheet of the hard drive, this is an SMR drive *(Shingled magnetic recording)<\/p>\n\n\n\n
Seagates markets this hard drive as a desktop hard drive, but beware, SMR drives are slow on writing, so when you are using the drive for a mostly read scenario, it may be good, but if your application is write intensive, this is not a good hard drive for that purpose<\/p>\n\n\n\n
Also, from the datasheet, this drive spins at 5400RPM, opposite to my older seagate barracuda 8TB (ST8000DM002) which is a 7200 and is not an SMR drive<\/p>\n\n\n\n
I will be doing some more experimentation with this drive in a bit, and post the results here<\/p>\n\n\n\n
The lowdown<\/strong>: 130 MiB\/s sequential Write, and 132 sequential read ! the older drive has a 230MiB\/s sequential read<\/p>\n\n\n\n The first experiment is using PV, for those who do not know, PV is like DD but somewhat more advanced, I will be copying the drive ST8000DM002 to the new ST8000DM004, after passing the 10GB mark, the transfer speed from one disk to the other was around 130 MiB\/s (Speed of writing to the new SMR drive)<\/strong>. Again, regardless of the data, this is a byte for byte copy including blank areas, therefore this is an example of a sequential write. for comparison, writing the same data to \/dev\/null (read on the old drive) results in 230 MiB\/s meaning the bottleneck is writing to the SMR drive. reading from the newer SMR drive to \/dev\/null results in 132 MiB\/s which is surprisingly similar to its read speed.<\/p>\n","protected":false},"excerpt":{"rendered":" I got an external USB3 8TB disk from Costco, namely the STEL8000401 Seagate Backup Plus Hub, the enclosure includes a USB3 HUB, and an 8TB 3.5 inch hard drive inside upon opening the shell, I was presented with an 8TB SATA 3 6Gb\/s drive with the model number ST8000DM004 According to the datasheet of the […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1274","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/www.voodoo.business\/blog\/wp-json\/wp\/v2\/posts\/1274","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.voodoo.business\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.voodoo.business\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.voodoo.business\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.voodoo.business\/blog\/wp-json\/wp\/v2\/comments?post=1274"}],"version-history":[{"count":6,"href":"https:\/\/www.voodoo.business\/blog\/wp-json\/wp\/v2\/posts\/1274\/revisions"}],"predecessor-version":[{"id":1283,"href":"https:\/\/www.voodoo.business\/blog\/wp-json\/wp\/v2\/posts\/1274\/revisions\/1283"}],"wp:attachment":[{"href":"https:\/\/www.voodoo.business\/blog\/wp-json\/wp\/v2\/media?parent=1274"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.voodoo.business\/blog\/wp-json\/wp\/v2\/categories?post=1274"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.voodoo.business\/blog\/wp-json\/wp\/v2\/tags?post=1274"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}