08-01-2019, 03:57 AM
(This post was last modified: 08-01-2019, 05:41 AM by stuartiannaylor.)
I would have a think about the USB solution if I was you as Snapraid isn't raid its just a bunch of disks with specific disks for parity that essential is as redundant as Raid.
I think if I knew more about RAID its just asynchronous distributed RAID4 that has had some good development.
The thing about USB in conjunction with Snapraid and static large media files is that each disk is separate so they are not all spinning at the same time, just the ones you are accessing or the ones doing a parity sync usually scheduled for a late night.
Not having the striping and all the enterprise wonderfulness of ZFS Zraid2 for large files doesn't mean its has any advantage.
For file, web & database servers then ZFS Zraid or other Raid mechanisms are essential and USB is an absolute no.
Everything has a fit for purpose and energy wise and many of distribution for static large media file repositories is perfect for USB and actually at least energy wise is pretty damn bad with ZFS.
12v 3.5" UAS USB3.0 adapters are like $5.00 and add a card with 4 ports and the 2 you have you would have a similar arrangement of 2x parity disks and 8x data disks that only spin up when they are specifically accessed so its massively more energy efficient by simplicity of design.
That https://www.cclonline.com/product/141126/PEXUSB3S42V/USB-Firewire-Cards/StarTech-com-4-Port-Dual-Bus-PCI-Express-PCIe-SuperSpeed-USB-3-0-Card-Adaptor-with-UASP-SATA/LP4-Power/CNT0278/ is still £70 but far more inline with the RockPro64 price, but 2 disks on each port would be no problem at all and try to distribute.
I would run up OMV install the Snapraid and unionfs plugins from omvextras and it will not make sense but when tried there is a brilliant simplicity about its manner that since I came across it its changed my perspective on at least large home media stores.
The startech seems to be another only alternative that is the USB alternative to yuour pcie x4 sata.
I think if I knew more about RAID its just asynchronous distributed RAID4 that has had some good development.
The thing about USB in conjunction with Snapraid and static large media files is that each disk is separate so they are not all spinning at the same time, just the ones you are accessing or the ones doing a parity sync usually scheduled for a late night.
Not having the striping and all the enterprise wonderfulness of ZFS Zraid2 for large files doesn't mean its has any advantage.
For file, web & database servers then ZFS Zraid or other Raid mechanisms are essential and USB is an absolute no.
Everything has a fit for purpose and energy wise and many of distribution for static large media file repositories is perfect for USB and actually at least energy wise is pretty damn bad with ZFS.
12v 3.5" UAS USB3.0 adapters are like $5.00 and add a card with 4 ports and the 2 you have you would have a similar arrangement of 2x parity disks and 8x data disks that only spin up when they are specifically accessed so its massively more energy efficient by simplicity of design.
That https://www.cclonline.com/product/141126/PEXUSB3S42V/USB-Firewire-Cards/StarTech-com-4-Port-Dual-Bus-PCI-Express-PCIe-SuperSpeed-USB-3-0-Card-Adaptor-with-UASP-SATA/LP4-Power/CNT0278/ is still £70 but far more inline with the RockPro64 price, but 2 disks on each port would be no problem at all and try to distribute.
I would run up OMV install the Snapraid and unionfs plugins from omvextras and it will not make sense but when tried there is a brilliant simplicity about its manner that since I came across it its changed my perspective on at least large home media stores.
The startech seems to be another only alternative that is the USB alternative to yuour pcie x4 sata.