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Comment by Thev00d00 | Hacker News Reader

400MBps transfer speed means it would take 1 day, 14hours to fill it...

That seems pretty good honestly for its intended use case.

Yeah that seems surprisingly good as I thought the write speeds I get from a spinning disk is around 100MB/s or less.

100MB/s or less? Are you using SMR 5400rpm disks? I routinely get 180-220MB/s throughput per Exos drive.

I just ran -

    dd if=/dev/zero of=tmp.img bs=1G count=1 oflag=dsync

And got - 1073741824 bytes (1.1 GB, 1.0 GiB) copied, 9.49586 s, 113 MB/s

The drive appears to be - WDC WD160EDGZ-11B2DA0, it's a 16TB disk, which I thought would be SMR, due to its size, but maybe I'm wrong.

> oflag=dsync

This will reduce performance

That's in the same ballpark as HDDs. It takes me ~24 hours to fill an 18 TB HDD.

tape libraries (even small) can have multiple drives in same 6U chassis. you can link multiple chassis together to build bigger system.

Since SATA/NL-SAS eaten up the lower tier of the enterprise HDDs you never write to the tape directly, it's always D2D2T.

thats great for tape

only marginally slower than your average SSD