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From: -hh <recscuba_google@huntzinger.com>
Newsgroups: comp.os.linux.advocacy
Subject: Re: new NAS
Date: Thu, 13 Feb 2025 06:52:43 -0500
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On 2/13/25 04:25, vallor wrote:
> I've got all the disks in the new NAS, which is a Synology Diskstation
> that runs Linux.

I've been fiddling with the notification settings on mine; seems that 
Synology doesn't like having two NAS's under the same email address.  If 
that's really what the root cause is, its easy enough to remedy.

> It has twelve 14TB disks, for 168T of total unformatted storage.  This
> will be used for two volumes:  One RAID5 for permanent storage, and a
> second RAID0 for temporary storage of video recordings.

I'd probably reconsider the RAID0 based on my comment below..


> If I can get the RAID0 volume fast enough, I might add an extra 10GB
> link on the Synology side, add one to my workstation, and then gang
> the ethernet connections on each side together for 20GBit connectivity.


Ah, first time I read through this I was under the assumption that you 
didn't have any 10GB link, so I was going to say to not bother with 
RAID0 until you upgraded the Ethernet.  This is my next step, which I'm 
procrastinating on because I don't have any 10GbE switches yet.

In any event, what kind of I/O are you presently getting?

> Hopefully that will allow me to record 4K video at 60fps.  (Currently,
> I'm limited to HD video at 60fps.)

FWIW, I recently saw a weird-ish external HDD hybrid (2 bay?) that had 
both USB-C and Ethernet connections.  I'll try to find it again.


> I won't be using NFS for the RAID0 volume -- choosing instead
> to use the faster iSCSI.


The Synology NAS's performance is reportedly helped a lot by increasing 
the RAM...seen some critical comments that the minimum it ships with is 
pretty low.  I'm not sure how much above said minimum is merited; I've 
pushed mine from 4GB to 32GB and its doing better.

Likewise, some models have slots to add NVMe cards for a disk cache 
which should help performance too - - I'm using a pair of spare 2TBs 
which is overkill, but I had them handy...I think the analyzer said that 
it wanted just ~250GB?  In any event, I'd expect the cache size needs to 
increase once I upgrade the Ethernet connection.


-hh