Fastest way transfer files onto NAS

[podkall]

Just now, LIGISTX said:

I can’t tell if you are joking or not….

 

The Wikipedia page for RAID has had extremely easy to understand pictures for decades. It’s super simple to understand with a few pictures. 

yeah I just don't like reading long text in general

[LIGISTX]

17 minutes ago, podkall said:

yeah I just don't like reading long text in general

https://en.m.wikipedia.org/wiki/Standard_RAID_levels#RAID_1
 

click the levels, and look at the pictures. The only RAID levels that “matter” are 0, 1, 3, and 10. 

[mariushm]

Transfer will be limited by the slowest link in the chain.

 

You're copying from one hard drive to multiple drives in a raid, through an ethernet connection I assume.

 

The 18 TB drive will have a speed that will start from around 270 MB/s and gradually go down towards maybe 120-150 MB/s as the heads move towards the other edge of the platters.

 

For example Seagate Exos drives advertise Max. Sustained Transfer Rate OD (MB/s, MiB/s)  270/258  - https://www.seagate.com/files/www-content/datasheets/pdfs/exos-x18-channel-DS2045-1-2007GB-en_GB.pdf

The old HGST Ultrastar 18 TB drives advertise maximum 269/257  https://www.e4company.com/wp-content/uploads/data-sheet-ultrastar-dc-hc550.pdf

 

example speed test on HC550

 

 

 

So you could average it to let's say 220 MB/s ... that's 220 x 1024 x 1024  / (1000 x 1000) x 8  = 1845 mbps  so even a 2.5 gbps ethernet card would be faster than the speed of your single drive.   

With just gigabit cards, you'd be limited to around 120-123 MB/s

 

At 200 MB/s you'll transfer 1 GB every 5 seconds, or 12 GB per minute, or 60 x 12 = 720 GB per hour, so 11 TB will be transferred in a bit more than 15 hours.