From mboxrd@z Thu Jan  1 00:00:00 1970
From: pg@lxra2.for.sabi.co.UK (Peter Grandi)
Subject: Re: Intel SSD or other brands
Date: Thu, 29 Dec 2016 11:39:47 +0000
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> [ ... ] I now found out that performance of a 520s SSD is
> around 180 times faster than a 530s SSD. [ ... ]

Well "performance" can be roughly the same, even if "speed" can
be very different.

http://www.sabi.co.uk/blog/15-two.html#151023

> 520s: 70MB/s
> 530s: 0.4MB/s
....
> fio --filename=/dev/sdb --direct=1 --sync=1 --rw=write --bs=4k 
>  --iodepth=1 --runtime=60 --time_based --group_reporting 
>  --name=IntelDC3510_4kj1 --numjobs=1

Arguably the 520s actually have no performance.

https://www.sebastien-han.fr/blog/2014/10/10/ceph-how-to-test-if-your-ssd-is-suitable-as-a-journal-device/