Expand a QuTS 6.0 QTier High-speed RAID 1 array to Raid 5

[gaetank]

I have a 1090FU with the following QTier configuration:

Pool 2: 2x7.68TB NVME SSD (High speed)

Pool 3: 8x24TB HDD RAID 6 (in a 24 bay PES expansion) (Low-speed)

Pool 4: 8x24TB HDD RAID 6 (in a 24 bay PES expansion) (Low-speed)

Pool 5: 8x24TB HDD RAID 6 (in a 24 bay PES expansion) (Low-speed)

I would like the expand the Raid group 2 with an additional 7.68TB drive, thus requiring RAID 5. I have the extra disk installed and it is recongized just fine. When I try to expand the pool it only lets me select RAID groups 3-5, but not group 2.

Is this because there is only a single disk available and it there must be 2 drives to expand the mirror? (I actually have one more drive to add bringing the total to 4, but it is not ready to swapped from another device)

Lets say I expanded the mirror to 4 drives, is there any way of converting that configuration to RAID 5?

Thanks,

Gaetan

[qverified]

Storage pool expansion | QuTS hero h6.0.x

[dolbyman]

Single to RAID1 or RAIDZ to RAIDZ2 is supported (with two disks added)
not RAID1 to RAIDZ

But you can destage your QTier (provided enough poolspace on the low speed tiers), kill the fast Tier and redo it in RAIDZ.

edit
I guess it’s on the roadmap, but not implemented yet.

[QuTS hero h6.0 Beta] QuTS hero h6.0 Beta Testing Suggestion - Qtier enhancement request — need ability to disable/remove Qtier and replace SSD tier

I’ve been testing the Quts Hero beta and overall the Qtier feature is very promising. The automated tiering works well and the performance benefits are noticeable. However, I’ve run into a limitation that significantly affects flexibility and future upgrades. Issue Once Qtier is enabled on a storage pool, there appears to be no option to: Disable Qtier Remove the existing SSD tier Replace the SSD tier with a new SSD (for example, a larger-capacity drive) This creates a problem when …

[gaetank]

Thanks for the suggestions. Looks like i can only add two disks to the existing raid1. Getting a raid5 array will require draining and removing the high speed group, but there needs to be an update for that.

Thanks

Gaetan

[dolbyman]

@gaetank

Getting a raid5 array will require draining and removing the high speed group, but there needs to be an update for that.

See my comment on the bottom, apparently there is no disabling QTier on QuTS like you can do on QTS, at least not currently

[SteveKo]

Thanks for your question! If anything else comes up, feel free to reach out to us anytime.

[dolbyman]

@SteveKo
When will QTier removal be available on QuTS, see my posts regarding that open feature requests

[MacAdmin]

Let me clarify this again:

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• QuTS hero 5.1 and higher: In-place -RAID-level-migration from RAID-5 to RAID-6 is supported, requires two incremental drives (not just one).

Note 1: This only applies to QNAP’s OpenZFS implementation in QuTS hero. In OpenZFS latest version 2.4.x this is not possible.

Note 2: I have tested it myself. If you just choose one drive an error-message will appear before the migration process starts, you need to choose 2 drives.

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• QuTS hero 5.1 and higher: In-place -RAID-level-migration from RAID-0 (single drive) to RAID-1 (Mirror) is not supported.

Note: I have tested it myself. The option “RAID 1” remains greyed out when you select a new drive.

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• QuTS hero 5.1 and higher: In-place -RAID-level-migration from RAID-1 to RAID-5 or RAID-6 is not supported.

Note: I have tested it myself. You only get the option “Triple RAID” when you select a newly-added drive. The option “RAID 5” is greyed-out.

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Unfortunately this is not documented in QNAP’s QuTS hero documentation or it is “hidden” somewhere else in the QuTS hero documentation.

I thus have opened a QNAP support-ticket and asked the QNAP team to add this extremely useful feature to the documentation.

Until I stumbled into this community thread I diddn’t know myself. For years!

Expanding a storage pool by adding disks to a RAID group | QuTS hero h6.0.x