Beta 3 service manual · Storage
1U NAS Server
The 1U NAS Server holds eight drives and shares them out to the rigs and servers that need somewhere to write.
| Category | Storage |
|---|---|
| Rack height | 1U |
| Price | $300 |
| Ports | PSU1, PSU2, ETH0, ETH1, CTL |
| Ships with | Ember E1 processor, one 8 GB DIMM, an 8-bay RAID controller, eight 8 TB drives, 500 W flex PSU, two 40 mm fans |
| Slots | 1 processor, 2 memory, 8 drive bays, 1 PSU, 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.
Bigger arrays
Fit 10 TB or 16 TB drives at the workbench for more room. Without a controller the NAS runs four bays on the backplane alone, in raid0 only. The 2U RAID NAS holds sixteen drives.
See also: 2U RAID NAS · Storage · 1U Server.