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Howdy, |
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I bought a 8TB hard drive. Seagate 8TB 5E8 Exos ST8000AS0003 is the |
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exact model info. It seems to be slow. First, I had it hooked to a |
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adapter to a USB port. I expected it to be a little slow but it gave me |
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memories of the old dial-up days. When it shows KBs/second, it's |
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getting slow for a sata drive. So, I moved it inside the case with a |
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sata connection directly to the mobo. I unhooked my DVD burner for |
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this. It's somewhat faster but still slow in my opinion. I found this |
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for specs on a website. |
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|
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Max. Sustained Transfer Rate OD (MB/s) |
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190MB/s |
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|
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OK, can I get half that now? One quarter would be better even. This is |
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a sample of what I get when using --progress with rsync while copying |
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files from another drive to it, backup thing. |
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|
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|
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102,782,342 100% 4.68MB/s 0:00:20 (xfr#122, ir-chk=1135/1995) |
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65,330,688 100% 5.34MB/s 0:00:11 (xfr#123, ir-chk=1134/1995) |
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|
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59,338,843 100% 2.04MB/s 0:00:27 (xfr#124, ir-chk=1133/1995) |
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|
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64,996,691 100% 10.99MB/s 0:00:05 (xfr#125, ir-chk=1132/1995) |
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467,837,625 100% 5.42MB/s 0:01:22 (xfr#126, ir-chk=1131/1995) |
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|
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39,236,581 100% 5.42MB/s 0:00:06 (xfr#127, ir-chk=1130/1995) |
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|
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302,340,815 100% 3.95MB/s 0:01:12 (xfr#128, ir-chk=1129/1995) |
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This is what I get from hdparm: |
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|
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root@fireball / # hdparm -Tt /dev/sdb |
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|
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/dev/sdb: |
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Timing cached reads: 8222 MB in 2.00 seconds = 4114.05 MB/sec |
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Timing buffered disk reads: 2 MB in 3.59 seconds = 570.26 kB/sec |
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root@fireball / # |
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First one looks reasonable but second one just plain sucks. Note the KB |
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instead of a MB. I get this on a much older drive: |
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|
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root@fireball / # hdparm -Tt /dev/sda |
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|
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/dev/sda: |
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Timing cached reads: 8664 MB in 2.00 seconds = 4335.98 MB/sec |
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Timing buffered disk reads: 328 MB in 3.01 seconds = 108.82 MB/sec |
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root@fireball / # |
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And smartctrl gives me this on the new drive: |
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|
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SMART Self-test log structure revision number 1 |
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Num Test_Description Status Remaining |
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LifeTime(hours) LBA_of_first_error |
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# 1 Extended offline Self-test routine in progress 90% |
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544 - |
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# 2 Short offline Completed without error 00% |
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543 - |
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# 3 Short offline Completed without error 00% |
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528 - |
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I've ran those tests in the past and it not affect the copy speed. |
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Still, it shows the drive is OK. I'm running the long one to be 100% |
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sure. I was getting the same before I started the selftest tho. I |
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created one large partition with gfdisk. It is formatted with ext4 file |
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system. Most files are videos but some are other file types and |
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smaller. Thing is, it seems slow no matter what size the file is. |
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Large files just take longer naturally. This is what mount shows |
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including options. |
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|
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|
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/dev/sdb1 on /mnt/tmpdisk type ext4 (rw,relatime) |
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|
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I have a few other drives on this system. They work fine and perform |
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fine. Heck, a 6TB drive in a external enclosure connected by USB does |
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better than this. Can someone explain why this drive is so terribly |
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slow? Did I do something wrong? Is there something special about a |
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drive this large that I need to do? |
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|
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Thanks. |
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|
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Dale |
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|
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:-) :-) |