When using expansion units such as the DX1215, are you presented with one huge volume, or does the expansion unit appear as a separate volume to whatever's on the main unit? I'm sure I recall reading about ReadyNAS devices that worked that way, i.e. separate volumes.
personally i would go for a separet volume, then if the expansion unit fails you still have two whole complete volumes to work with, rather than a broken array.
but the unit just presents you with 24 disks to RAID/partition however you like
As I recall, you can either expand your existing volume into the new device, or have it as a seperate volume - but it depends on specs.
IE I have a DS214 - I can use the DX215 expansion module but it doesn't support hot expansion (I think you require the DS713 for that) but it *will* allow me to add the extra disks as an extra drive group/mountpoint - so it's still useful for me, but for my friend who has a 3tb (and growing) photo collection, she'd be better with the DS713 as a control unit so she can seamlessly add more storage.
It's all on the specs pages for the devices, Syno are pretty clear about what works and what doesn't.
For a second those prices seemed unusually reasonable. Then I remembered that only in the world of Steam does £1 = $1, and only ever when converting the other direction.
I suppose it's expected at this point, but too bad these are both artificially limited to 6GB memory (the slot that comes with 2GB is not expandable without voiding the warranty) and don't offer ECC RAM.
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rpg1966 - Tuesday, January 20, 2015 - link
When using expansion units such as the DX1215, are you presented with one huge volume, or does the expansion unit appear as a separate volume to whatever's on the main unit? I'm sure I recall reading about ReadyNAS devices that worked that way, i.e. separate volumes.Gigaplex - Tuesday, January 20, 2015 - link
I would expect it to expose each drive individually to the NAS firmware, and however you RAID them and expose them over the network is up to you.Docchris - Tuesday, January 20, 2015 - link
Its up to youpersonally i would go for a separet volume, then if the expansion unit fails you still have two whole complete volumes to work with, rather than a broken array.
but the unit just presents you with 24 disks to RAID/partition however you like
Beany2013 - Wednesday, January 21, 2015 - link
As I recall, you can either expand your existing volume into the new device, or have it as a seperate volume - but it depends on specs.IE I have a DS214 - I can use the DX215 expansion module but it doesn't support hot expansion (I think you require the DS713 for that) but it *will* allow me to add the extra disks as an extra drive group/mountpoint - so it's still useful for me, but for my friend who has a 3tb (and growing) photo collection, she'd be better with the DS713 as a control unit so she can seamlessly add more storage.
It's all on the specs pages for the devices, Syno are pretty clear about what works and what doesn't.
See here: https://www.synology.com/en-us/products/DX513#spec
edward1987 - Monday, January 18, 2016 - link
Expansion unit, RAM and off course Rails are in the list you need wit RS815+ rack nas. Here is the list: http://www.span.com/product/Synology-4-Bay-RackSta... at the the bottom.Black Obsidian - Tuesday, January 20, 2015 - link
For a second those prices seemed unusually reasonable. Then I remembered that only in the world of Steam does £1 = $1, and only ever when converting the other direction.chaos215bar2 - Tuesday, January 20, 2015 - link
I suppose it's expected at this point, but too bad these are both artificially limited to 6GB memory (the slot that comes with 2GB is not expandable without voiding the warranty) and don't offer ECC RAM.