09-14-2017, 02:29 PM
(This post was last modified: 09-14-2017, 02:43 PM by stuartiannaylor.)
Problem is the USB speeds.
Usb2.0 is a raw 480 megabits per second whilst HDD can approach 100MB/s>
Gig eth can only go on USB 3.0 so you are starting to flood that bandwidth.
You would be better hanging off a USB 3.0 4 bay RAID unit off the USB 3.0 and maybe port aggregate to approx 1.5GB's with a USB 3.0 ethernet.
Reading the Armbian guys who are very OMV (open media vault) orientated it would seem Raid over USB separate drives is not a good idea.
It will work but before you get there you have to think about the USB ports max raw bandwidth then deduct overhead and look at what you can place on it.
After trying to argue with the Armbian guys a few times I am sort of also realizing its mainly a single disk system but must admit the arguments of USB connectors not being good enough is a little contrite but gave in.
To be honest I think the centralised NAS architecture might well be slowly replaced as new form of decentralized hardware at a bang/buck ration never seen before start to employ newer distributed storage technologies that are under heavy development.
https://lizardfs.com/
http://ceph.com/
http://www.xtreemfs.org/
Most direction is aimed at data-centers but with cost levels and the ever increasing capabilities of these boards in terms of network & disk i/o I think we might see private lan distributed storage.
Been reading about it for some time Lizardfs is in the debian Repo's but still have to get my rock to try.
You don't need a NAS when each device can have local storage that adds to a decentralised storage pool via a p2p FS.
Each media, alexa, kodi, router, web server has Sd & Emmc and can allow HDD & SSD be added to the overall mesh storage pool.
Usb2.0 is a raw 480 megabits per second whilst HDD can approach 100MB/s>
Gig eth can only go on USB 3.0 so you are starting to flood that bandwidth.
You would be better hanging off a USB 3.0 4 bay RAID unit off the USB 3.0 and maybe port aggregate to approx 1.5GB's with a USB 3.0 ethernet.
Reading the Armbian guys who are very OMV (open media vault) orientated it would seem Raid over USB separate drives is not a good idea.
It will work but before you get there you have to think about the USB ports max raw bandwidth then deduct overhead and look at what you can place on it.
After trying to argue with the Armbian guys a few times I am sort of also realizing its mainly a single disk system but must admit the arguments of USB connectors not being good enough is a little contrite but gave in.
To be honest I think the centralised NAS architecture might well be slowly replaced as new form of decentralized hardware at a bang/buck ration never seen before start to employ newer distributed storage technologies that are under heavy development.
https://lizardfs.com/
http://ceph.com/
http://www.xtreemfs.org/
Most direction is aimed at data-centers but with cost levels and the ever increasing capabilities of these boards in terms of network & disk i/o I think we might see private lan distributed storage.
Been reading about it for some time Lizardfs is in the debian Repo's but still have to get my rock to try.
You don't need a NAS when each device can have local storage that adds to a decentralised storage pool via a p2p FS.
Each media, alexa, kodi, router, web server has Sd & Emmc and can allow HDD & SSD be added to the overall mesh storage pool.
