If ZimaOS detects USB/DAS disks but the Storage wizard still says “Insert disks,” update your diagnosis before following old advice that USB drives cannot join storage arrays. That limitation applied to older ZimaOS releases. Current 2026 Storage Setup documentation explicitly says USB drives can be used for storage, added to an array, or used to expand existing space.
The source thread was running ZimaOS 1.3.3 on a four-bay Mediasonic USB DAS, and IceWhale staff correctly said USB-connected drives could not create a storage pool at that time. The article therefore needs a strong version boundary: the historical answer is no longer current product behavior.
Current ZimaOS Now Supports USB Drives in Storage Setup
The current ZimaOS Storage Setup guide states that USB drives follow the same storage logic as internal HDDs/SSDs and can be used for storage, added to an array, or used to expand space.
ZimaOS 1.6.2 release notes also mention stability improvements around USB storage.
Step 1: Update to a Current Stable ZimaOS Release
If you are still on 1.3.x, 1.5.x, or another old build, update before spending time on a limitation that may already be fixed. Back up important data first.
Step 2: Confirm the DAS Exposes Individual Disks
Some multi-bay USB enclosures present each physical disk separately in JBOD mode. Others expose one hardware-RAID virtual disk. ZimaOS can only create a software array from individual disks it can address separately.
Run:
lsblk -o NAME,SIZE,MODEL,SERIAL,TRANIf you expect four drives but Linux only sees one large USB block device, the enclosure—not ZimaOS—is combining them before the OS sees them.
Step 3: Check Whether the Disks Already Contain Old Metadata
Use lsblk -f to inspect existing filesystems and labels. Old RAID, ZFS, NTFS, exFAT, or other metadata can affect whether the Storage wizard offers the disks for a new configuration.
Do not wipe them until you have backed up anything important.
Step 4: Reopen Settings → Storage
On a current release, newly connected disks should appear in the Storage view. Use the Combine/setup workflow and verify which disks are eligible.
If the UI still says “Insert disks” even though lsblk shows them, capture screenshots plus the current ZimaOS version and hardware/enclosure model. That is now a bug/compatibility report, not an expected limitation.
USB Arrays Have Different Reliability Risks
Just because USB arrays are now supported does not mean every enclosure is equally reliable for RAID. Shared USB bridges, cable disconnects, power-saving behavior, enclosure resets, and unstable serial identifiers can affect several member disks at once.
For critical RAID, direct SATA/SAS connectivity is still the simpler failure domain. Use USB arrays when the enclosure, bridge, power supply, and cabling are proven stable.
Do Not Confuse DAS Hardware RAID with ZimaOS RAID
If the enclosure itself is configured for RAID, ZimaOS may see one logical disk. In that design, the enclosure owns disk redundancy and rebuild behavior. ZimaOS cannot monitor the individual members in the same way as a software array it created itself.
What If the Disks Work on One PC but Not Another?
Compare USB controller, cable, power, enclosure mode, kernel logs, and whether the new host exposes the same individual disk identities. A 10Gbps USB-C label does not guarantee identical UAS/bridge behavior on every controller.
The storage troubleshooting checklist provides a safe escalation path.
FAQ
Can current ZimaOS create an array from USB drives?
Current Storage Setup documentation says USB drives can be added to an array or used to expand existing space. The 1.3.3 forum limitation is historical.
Why does my four-bay DAS appear as only one disk?
The enclosure may be operating in hardware RAID mode. Switch to a mode that exposes individual disks if you want ZimaOS to manage the array.
Should I wipe the drives if the Storage wizard cannot use them?
Not until you inspect existing filesystems and protect any needed data. Old metadata is only one possible cause.
Is USB RAID as reliable as direct SATA?
It can work, but USB adds bridge, cable, enclosure-power, and disconnect risks. Validate the enclosure carefully for important arrays.
