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That's bad. My NSA325 does better.

admin@NSA325:/i-data/3a22b091$ time dd if=/dev/zero of=1GB bs=1M count=1k1024+0 records in1024+0 records out1073741824 bytes (1.0GB) copied, 20.457738 seconds, 50.1MB/sreal	0m 20.46suser

As you can see it hardly matters if only is written, or if read from one disk and written to another one. When I only write on my 520, I get 104MB/sec.

CODE: Alles auswählen

admin@NAS520:/i-data/38aa86ff$ time dd if=/dev/zero of=1GB bs=1M

...

So it does not have a spare slot on the back and thus is limited to 1GB. Thanks.

The guide ftp://ftp.zyxel.com/NAS540/firmware/521AATB5C0.pdf mentions:

Modification in V5.21(AATB.1)C0 | Jun 21 2018
[Bug fix]
 Fix sys-log issue.
 Fix NFS problem.
 Remove "Hot swapping" related information.

Was that just a textual information removed in some place or is it also a functional change regarding the feature?

No problem ,it works

thanks for help

Anyway, thanks a lot for your help to both of you!

Think we can close this topic for the time being.

Link: https://zyxel.diskstation.eu/Users/Mijzelf/zypkg-repo

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