Mar 13, 2012 · +1 Also, the perblock checksums allows ZFS, should it find corruption in an array, to single out the affected files. Most R5 HBAs will simply mark the whole volume as corrupted, or report back to the OS that a sector is corrupted, either way the HBA has no way of knowing which disk is wrong in a corruption scenario. –

Just below: "Using ZFS redundancy has many benefits – For production environments, configure ZFS so that it can repair data inconsistencies...If you are confident in the redundancy of your hardware RAID solution, then consider using ZFS without ZFS redundancy with your hardware RAID array". I can't see any recommendations to use HW RAID ...

Goto step 1 and repeat for each successive drive in the array. You may need to export and then import the zpool once this procedure is complete; the pool will then show the increased size. No downtime is required, but if a drive does go south while you're upgrading your array, you will lose everything, as with four total disks you presumably ...

Feb 11, 2021 · I'll set the Smart array to carve out a 100GB RAID 60 volume for the OS and the remainder to the data volume. ZFS will be installed on top of the RAID block device presented to the OS (e.g. a single VDEV ZFS zpool) The reasoning for this design is that HPE SmartArray hardware RAID is reliable and consistent in operation.

Apr 9, 2017 · I actually have 4 SATA 3.0 disks on my home server and I want to organize them in order to have the best performance on my 10 RAID ZFS array. Seagate ST2000DL003 - Capacity : 2TB, Bandwith : 6GB/s, Cache : 64Mo, 5900 RPM, 4K physical sector; Seagate ST2000VN000 - Capacity : 2TB, Bandwith : 6GB/s, Cache : 64Mo, 5900 RPM, 4K physical sector

Oct 31, 2014 · Don't go down the road of breaking the ZFS array to "rotate" disks offsite. As you've seen, the rebuild time is high and the resilvering process will read/verify the used size of the dataset. If you have the ability, snapshots and sending data to a remote system is a clean, non-intrusive approach.

I have a setup where we need to spin down HDDs that host a zfs array for energy reasons. I use hdparm to configure apm = 24 and spindown_time = 24 for all disks. The system works as expected most of the times. The drives spin down after a few minutes of inactivity. However, from time to time, the disks do not spin down after a zfs recv.

I'm planning to use ZFS on my system (HP ML370 G5, Smart Array P400, 8 SAS disk). I want ZFS to manage all disks individually, so it can utilize better scheduling (i.e. I want to use software RAID feature in ZFS). The problem is, I can't find a way to disable RAID feature on the RAID controller. Right now, the controller aggregates all of the ...

Aug 26, 2019 · # zpool add array cache /dev/sdj2 cannot add to 'array': one or more vdevs refer to the same device is there a way to remove the reference from the zpool array so i can readd it? ive tried remove: # zpool remove array /dev/sdj2 cannot remove /dev/sdj2: no such device in pool

Nov 21, 2016 · The DotHill setup has the same limitations as an HP StorageWorks MSA2000/P2000 in that only 16 drives can be used in a single array grouping. ZFS atop hardware RAID or an exported SAN LUN is not necessarily a problem. However, striping ZFS LUNs over unknown interconnects, across expansion chassis can introduce some risk.