Hello all,
I'm not to DIY NAS, NAS4Free, ZFS, and am getting ready to install NAS4Free this weekend. I've been reading up on ZFS and optimal number of drives, and I noticed on this page https://calomel.org/zfs_raid_speed_capacity.html there is no mention of using 8 drives. I was going to use 8 HDD's in my enclosure, but now I'm going to reconsider. What is the reason 8 HDD's is not supported?
Any info, links would be greatly appreciated.
Thanx.
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it will taken offline by the end of march 2021!
I like to aks Users and Admins to rewrite/take over important post from here into the new fresh main forum!
Its not possible for us to export from here and import it to the main forum!
Number of Drives
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erico.bettoni
- experienced User
- Posts: 140
- Joined: 25 Jun 2012 22:36
- Location: São Paulo - Brasil
- Status: Offline
Re: Number of Drives
It is supported and will work very well! You will get faster performance if the number of data drives is a power of 2. But with current hardware and disks your bottleneck will probably end up being the network.
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taffeys
- Starter
- Posts: 35
- Joined: 13 Nov 2013 21:09
- Location: San Diego, California USA
- Status: Offline
Re: Number of Drives
The "optimum" number of drives for ZFS vs raid levels hearsay has been proven to be a fallacy. As erico said, your network connection will most likely be the limiting factor in your systems overall performance.
*Dell PowerEdge T20, Xeon E3-1286L v3 3.2GHz (4.0GHz Turbo) 65W TDP, 32GB DDR3L-1600 ECC RAM, Dell 80 PLUS Gold 365W PSU, Intel I350-T2 2-port NIC, LSI 9211-8i HBA ("IT" mode), 7 x 4TB Seagate NAS HDD (ZFS raid Z3 data), 1 x Samsung 850 PRO 256GB SSD L2ARC.
*ASRock Rack E3C226D21 Mini-ITX, Xeon E3-1275L v3 2.7GHz (3.9GHz Turbo) 45W TDP, Noctua NH-L9i CPU cooler, 16GB DDR3L-1600 ECC RAM, picoPSU-160-XT, CFI A6039 NAS Server Mini-ITX Case, 5 x 4TB Seagate NAS HDD (ZFS raid Z1 data), 1 x Samsung 850 PRO 256GB SSD L2ARC.
*ASRock Rack E3C226D21 Mini-ITX, Xeon E3-1275L v3 2.7GHz (3.9GHz Turbo) 45W TDP, Noctua NH-L9i CPU cooler, 16GB DDR3L-1600 ECC RAM, picoPSU-160-XT, CFI A6039 NAS Server Mini-ITX Case, 5 x 4TB Seagate NAS HDD (ZFS raid Z1 data), 1 x Samsung 850 PRO 256GB SSD L2ARC.
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ChriZathens
- Forum Moderator
- Posts: 758
- Joined: 23 Jun 2012 09:14
- Location: Athens, Greece
- Contact:
- Status: Offline
Re: Number of Drives
Just make sure that you use double parity with 8 drives and do proper burn in tests before putting it in production.
My Nas
Backup Nas: U-NAS NSC-400, Gigabyte MB10-DS4 (4x4TB Seagate Exos disks in RaidZ configuration - 32GB RAM)
- Case: Fractal Design Define R2
- M/B: Supermicro x9scl-f
- CPU: Intel Celeron G1620
- RAM: 16GB DDR3 ECC (2 x Kingston KVR1333D3E9S/8G)
- PSU: Chieftec 850w 80+ modular
- Storage: 8x2TB HDDs in a RaidZ2 array ~ 10.1 TB usable disk space
- O/S: XigmaNAS 11.2.0.4.6625 -amd64 embedded
- Extra H/W: Dell Perc H310 SAS controller, crosflashed to LSI 9211-8i IT mode, 8GB Innodisk D150SV SATADOM for O/S
Backup Nas: U-NAS NSC-400, Gigabyte MB10-DS4 (4x4TB Seagate Exos disks in RaidZ configuration - 32GB RAM)