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"Misaligned" ZFS VDEVs

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jack47
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"Misaligned" ZFS VDEVs

Post by jack47 »

Hi,
starting with 9.3.0.2.x builds zpool status gives me a "block size: 512B configured, 4096B native" (using WD Red drives).

I tried to reformat a recreate the pool, but the warning remains.

Is there a way to solve the problem?
Keeping the drives like this impact on performance/stability/reliability of the pool?

Regards Jack

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ChriZathens
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Re: "Misaligned" ZFS VDEVs

Post by ChriZathens »

When you create your vdev, (Disks|ZFS|Pools|Virtual device |add) you have to check the Advanced Format option there
Vdev_create.jpg
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My Nas
  1. Case: Fractal Design Define R2
  2. M/B: Supermicro x9scl-f
  3. CPU: Intel Celeron G1620
  4. RAM: 16GB DDR3 ECC (2 x Kingston KVR1333D3E9S/8G)
  5. PSU: Chieftec 850w 80+ modular
  6. Storage: 8x2TB HDDs in a RaidZ2 array ~ 10.1 TB usable disk space
  7. O/S: XigmaNAS 11.2.0.4.6625 -amd64 embedded
  8. 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)

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crowi
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Re: "Misaligned" ZFS VDEVs

Post by crowi »

Did you check the advanced format switch at Disks|Format ?

Can you post the output of the command

Code: Select all

zdb | grep ashift
NAS 1: Milchkuh: Asrock C2550D4I, Intel Avoton C2550 Quad-Core, 16GB DDR3 ECC, 5x3TB WD Red RaidZ1 +60 GB SSD for ZIL/L2ARC, APC-Back UPS 350 CS, NAS4Free 11.0.0.4.3460 embedded
NAS 2: Backup: HP N54L, 8 GB ECC RAM, 4x4 TB WD Red, RaidZ1, NAS4Free 11.0.0.4.3460 embedded
NAS 3: Office: HP N54L, 8 GB ECC RAM, 2x3 TB WD Red, ZFS Mirror, APC-Back UPS 350 CS NAS4Free 11.0.0.4.3460 embedded

jack47
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Re: "Misaligned" ZFS VDEVs

Post by jack47 »

ashift: 9

there is a way to realign an already created vdev? (deleting it an recreating is not an option)

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b0ssman
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Re: "Misaligned" ZFS VDEVs

Post by b0ssman »

no there is not. you have to recreate the pool
Nas4Free 11.1.0.4.4517. Supermicro X10SLL-F, 16gb ECC, i3 4130, IBM M1015 with IT firmware. 4x 3tb WD Red, 4x 2TB Samsung F4, both GEOM AES 256 encrypted.

jack47
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Re: "Misaligned" ZFS VDEVs

Post by jack47 »

ok thanks.

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Re: "Misaligned" ZFS VDEVs

Post by Onichan »

If you are already using it then it's not that big a deal for home NAS's. Yes it does hurt performance a bit, but you probably wouldn't notice it unless you are running some virtuals off it or have 10Gb NIC.

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