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Best way to build 2 NAS Server (25TB each RAID6) for replication - using existing readynas hardware
we are trying to build 2 NAS servers with around 25TB RAID6 Storage (replicate with each other -21TB used so far) & we need to figure out the least expensive way to do this utilizing existing hardware here is our current setup.. (using 30 Hard drives right now with 7 extra, all on HCL smaller drives are older/expected to fail requires RAID6 (lowest "unused" disk space if possible)
RN628X (10TB,10,8,6,6,6,4,3) usable =28.16TB with EDA500 (1.5TB, 2,1,1,1) Raid5 usable =4TB
RN716X (10TB,10,4,4,4,4) usable =14.53TB with EDA500 (750GB, 750, 1,2,2) usable =2TB
PRO6 (750GB, 750, 500, 1,1,1) usable =2.48TB - Extra drives avail = 500GB, 500,500,150GB,250GB, 160GB, 100GB)
so do we simply add larger drives to 716 to achieve 25TB (what sizes HD to add?), then buy a 2nd/3rd EDA500 to attach to the 716 ultize the extra drives in RAID6? or would it be better to pickup a RN528X (for the 8bay CPU/RAM not as important) attach the existing EDA500 - with the goal of getting rid of the PRO6 (using OS6 out of warranty) and 716X (almost out of warranty) - I realize someone might say "get rid of everything & buy a RR4360x" or RR4312x with expansion but it's not in the budget.. or if "moving around HD between NAS servers (for example move the other 10TB into 628x (so you have 4x10TB) & buy <this size HD> for 716x ... another idea on the PRO6 use the oldest 150/250 then when the drives fail upgrade them to 500 etc. - I have been trying to use the Netgear XRaid calulator but it's outdated - so I'm looking for some advise, if the 528x would be the best option as we are also trying to reduce the number of boxes - we just don't like having unused hard drives around..
I'm not sure if your target sizes are TiB or TB. I'm assuming TiB.
The general rule with dual redundancy is that the four largest disks should all be the same size. Otherwise you are wasting space. IMO the small disks don't really help enough to be worth the trouble.
What I would do is get one more 6 TB drive and go with
RN716x: 4x10TB+8 TB -> 28 TB (25.4 TiB) of total storage
RN628x: 4x6TB+4x4TB-> 28 TB (25.4 TiB) of total storage
No need for the EDA500s or small disks.
If you can't spend anything on new drives then go with
RN628x: 3x6TB+5x4TB (24TB) with a second volume on one of the EDA500s: 1x3TB + 3x2TB (4 TB).
That also gives you 28 TB total, though split across two volumes. Note it wastes space on both the 628x and the EDA500 (since the four largest disks aren't the same size).
The drawback with both plans is that they require a full backup of your existing setup before you can migrate to it. I don't see any path that avoids that problem though.
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I'm not sure if your target sizes are TiB or TB. I'm assuming TiB.
The general rule with dual redundancy is that the four largest disks should all be the same size. Otherwise you are wasting space. IMO the small disks don't really help enough to be worth the trouble.
What I would do is get one more 6 TB drive and go with
RN716x: 4x10TB+8 TB -> 28 TB (25.4 TiB) of total storage
RN628x: 4x6TB+4x4TB-> 28 TB (25.4 TiB) of total storage
No need for the EDA500s or small disks.
If you can't spend anything on new drives then go with
RN628x: 3x6TB+5x4TB (24TB) with a second volume on one of the EDA500s: 1x3TB + 3x2TB (4 TB).
That also gives you 28 TB total, though split across two volumes. Note it wastes space on both the 628x and the EDA500 (since the four largest disks aren't the same size).
The drawback with both plans is that they require a full backup of your existing setup before you can migrate to it. I don't see any path that avoids that problem though.
thanks Stephen,
we don't have extra space to backup both NAS for drive changes at the same time.. - so I think we will move a single 10TB over to the 716 convert to XRAID5 rsynce all the data onto it, factory reset 628x with the drives mentioned above.. resync to it.. then factory reset the 716x with RAID6.. then nightly rsync so one is a mirror of the other.
what is your thoughts on 10TB drives between WD Gold & Ironwolf/standard & pro ... Lastly XRAID6 -vs- FlexRaid6 - if a 6 bay NAS factory reset with XRAID5, and you install (500,640,750, 1,1.5TB,2,2.5TB) Click to turn off XRAID - Set FlexRAID6, let it finish it's rebuild.. then click XRAID on - does that give you 3.5Tib usable, 1.82Tib protection & 2.73Tib unused( like XRAID6 should) - or only 2.25Tib usable 931Gib protection & 4.9Tib unused (like FlexRaid6 per the xraid calulator) with the 4.x code you could setup "factory reset with dual redundancy" Xraid6 out of the box with 6 drives.. that only seems to be an option now with 8 bay or above..
P.S. I think we have met before - were you at the Netgear SMB meeting in San Jose in December - if so feel free to IM me for the group photo..
kevinfor2014 wrote:
P.S. I think we have met before - were you at the Netgear SMB meeting in San Jose in December - if so feel free to IM me for the group photo..
Yes, we met there. :smileyhappy: I'll PM you on the group photo.
kevinfor2014 wrote:
we don't have extra space to backup both NAS for drive changes at the same time.. - so I think we will move a single 10TB over to the 716 convert to XRAID5 rsynce all the data onto it, factory reset 628x with the drives mentioned above.. resync to it.. then factory reset the 716x with RAID6.. then nightly rsync so one is a mirror of the other.
That should work too, assuming that you are also putting 4x10TB on the RN716 before the final reset. 2x4TB and 1x8TB will both work, I suggested 1x8TB to give you an empty slot for expansion (plus you waste 2 TB if you deploy a single 8 TB in the RN628).
kevinfor2014 wrote:
what is your thoughts on 10TB drives between WD Gold & Ironwolf/standard & pro
I haven't used any 10 TB drives. My systems all use WD Reds (not the pros) at the moment. My only experience with the Ironwolf is with the 1 TB model. That worked well in my RN526x for testing, but they aren't anywhere close to large enough.
As you likely recall, I am a home user with a home office, so I don't need the performance boost of enterprise-class drives (and I prefer the lower temps of the NAS-purposed drives). So I can only comment on the drive specs, with no personal experience behind it. Seagate DM drives (particularly the 3 TB DM) don't seem to work out well (based on posts here) but I don't see many problems posted here with Ironwolf.
- The Ironwolf Pro is slightly quieter and uses a bit less power. So it should also be a bit cooler.
- The WDC gold has a much higher workload rating (FWIW).
- The WDC gold has side-mounting holes, so the toolless insert in the disk tray should work. The Seagates don't.
Note also that the RN628 trays should have more mounting holes on the bottom than your older RN716 trays. If you are using screws to mount the drives, you might want to shuffle the trays around to make sure you can accomodate the alternative mount points on the larger drives.
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