Beta 3 service manual · Storage
2U RAID NAS
The 2U RAID NAS is the big array: sixteen drive bays, two PSU slots and 80 mm fans.
| Category | Storage |
|---|---|
| Rack height | 2U |
| Price | $700 |
| Ports | PSU1, PSU2, ETH0, ETH1, CTL |
| Ships with | Loom L4 processor, one 8 GB DIMM, a 16-bay RAID controller, sixteen 10 TB drives, 600 W flex PSU, two 80 mm fans |
| Slots | 1 processor, 4 memory, 16 drive bays, 2 PSUs, 2 fans, 1 controller |
Shares
A NAS carves its usable capacity into shares, one per client. A crypto rig or a hosting server needs a share to write its data. A rig or server prefers a NAS in its own rack, and can only use one on its own network.
The SHARES header reads used, allocated and capacity. A new share needs unallocated room, not empty drives. When there is no room, the SHARES tab offers the quickest fix: remove empty shares, shrink one, drop a backup mirror, or add drives.
RAID
| Level | Capacity | Survives |
|---|---|---|
| raid0 | every drive | nothing: one dead drive loses the array |
| raid5 | minus one drive | one failure, with 3 or more drives |
| raid6 | minus two drives | two failures, with 4 or more drives |
A survived failure runs the array DEGRADED: data holds, hosting slows, and swapping the dead drive at the workbench rebuilds it. A failure past what the level survives loses every unbacked share.
Backups
RAID protects against a drive. A mirror protects against the whole NAS. Set a share's backup to MIRROR onto another NAS on the same network.
Busy drives run hot
Stored data, busy clients and a rebuild all heat the NAS. A loaded NAS short of fans overheats; held far too hot it smokes, and then its whole rack burns. Watch the drive wall: a steady red light is a dead drive.
Terminal: nas, nas <dev> raid raid5, nas <dev> space.
Room to grow
Sixteen 10 TB drives make 160 TB raw. raid6 keeps two drives for parity and survives two failures at once, which matters more the more drives an array holds. The second PSU slot lets you feed it from two chains.
See also: 1U NAS Server · Storage · 4U Mining Frame.