xerces8 Posted August 25, 2019 Share Posted August 25, 2019 Recently I bought (see other topic) an external USB drive from WD, hoping it would be not SMR, but it turned out to be such. Are there any non-SMR USB drives on the market at the lower price range? I'm loking at sizes of 5-6 TB. Quote Link to comment
JorgeB Posted August 26, 2019 Share Posted August 26, 2019 AFAIK Toshiba doesn't have any 3.5" SMR drives, so any external 3.5" will be CMR, they do use SMR on 2.5" drives. Quote Link to comment
xerces8 Posted August 26, 2019 Author Share Posted August 26, 2019 Well, they also have 50% higher prices... Quote Link to comment
JorgeB Posted August 26, 2019 Share Posted August 26, 2019 Well, I'm afraid not many other options, you could go for WD 8TB, those are CMR, at least for now. Quote Link to comment
xerces8 Posted September 10, 2019 Author Share Posted September 10, 2019 (edited) I got a WD My Book 8 TB (WDBBGB0080HBK-EESN) and after some testing it looks like a non-SMR drive. See CDM screenshot attached (the disk was 99.999% full, to make it "sweat", the test with 0% full is almost the same except the SEQ values being 199MB/s). Also test with FIO as per this post suggests it is not SMR. The summary: TEST: (groupid=0, jobs=1): err= 0: pid=4768: Tue Sep 10 22:24:49 2019 write: IOPS=7, BW=73.2MiB/s (76.8MB/s)(85.8GiB/1200024msec) slat (usec): min=353, max=4294.0k, avg=2579.76, stdev=71064.79 clat (usec): min=2, max=9319.4k, avg=69451.95, stdev=100307.35 lat (msec): min=35, max=402895, avg=136.54, stdev=4401.42 clat percentiles (msec): | 1.00th=[ 41], 5.00th=[ 47], 10.00th=[ 51], 20.00th=[ 57], | 30.00th=[ 61], 40.00th=[ 64], 50.00th=[ 67], 60.00th=[ 70], | 70.00th=[ 74], 80.00th=[ 80], 90.00th=[ 87], 95.00th=[ 93], | 99.00th=[ 114], 99.50th=[ 188], 99.90th=[ 234], 99.95th=[ 239], | 99.99th=[ 9329] bw ( KiB/s): min=19922, max=183585, per=100.00%, avg=144614.45, stdev=17834.58, samples=1226 iops : min= 1, max= 17, avg=13.38, stdev= 1.78, samples=1226 lat (usec) : 4=0.02%, 20=0.02%, 50=0.05%, 100=0.01% lat (msec) : 50=9.84%, 100=87.85%, 250=2.17%, 500=0.02% cpu : usr=0.33%, sys=0.42%, ctx=0, majf=0, minf=0 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,8788,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=1 Run status group 0 (all jobs): WRITE: bw=73.2MiB/s (76.8MB/s), 73.2MiB/s-73.2MiB/s (76.8MB/s-76.8MB/s), io=85.8GiB (92.1GB), run=1200024-1200024msec Edited September 10, 2019 by xerces8 1 Quote Link to comment
JorgeB Posted September 11, 2019 Share Posted September 11, 2019 8 hours ago, xerces8 said: I got a WD My Book 8 TB (WDBBGB0080HBK-EESN) and after some testing it looks like a non-SMR drive. Like mentioned WD doesn't have any 8TB SMR drives, only 2 and 6TB, at least for now. Quote Link to comment
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