Schwarzgerät III

Line 221:

I love the [http://www.cabledeconn.com/Mini-SAS-Series-/SATA-Esata-list-138-160.html CableDeconn bunched SATA] data cables; they're definitely the only way to fly (assuming lack of SATA backplanes, which good luck in a workstation form factor). We end up with 4x 3.5 drives in the bay, 10x 3.5 drives in CaseLabs cages in the PSU side, 3x M.2 devices in the motherboard PCIe 4.0 slots, and 2x M.2 devices in the HyperX card. This leaves room for 2 more M.2s in the card, and 4x 2.5 devices in the smaller bay. The bottom 2 slots in the bottom hard drive cage are blocked by the PSU-side radiator; indeed, I had to take a hacksaw to said cage to get it into the machine.

How to arrange 14 disks? I don't bother with solutions involving hot spares:

How to arrange 14 disks so as to create a single volume? I don't bother with solutions involving hot spares:

{| class="wikitable"

Line 291:

|}

I went with a striped raidz2 for my 14 Exos drives (also known as a RAID60 in the Old English), yielding 180TB usable from 252TB total (71.4%). I suffer data loss if I lose any combination of 5 drives, and can lose data if I lose certain combinations of 3 drives (any combination where all three lost drives are in the same raid2z), but no rebuild ever involves more than seven drives. All filesystems are ZFS, and all storage enjoys some redundancy (save the 16GB Optane, which is just for persistent memory/DAX experiments).

I went with a striped raidz2 for my 14 Exos drives (also known as a RAID60 in the Old English), yielding 180TB usable from 252TB total (71.4%). I suffer data loss if I lose any combination of 5 drives, and can lose data if I lose certain combinations of 3 drives (any combination where all three lost drives are in the same raid2z), but no rebuild ever involves more than seven drives. All filesystems are ZFS, and all storage enjoys some redundancy (save the 16GB Optane, which is just for persistent memory/DAX experiments). I could have split the volume and had two raidz2s with no interdependence, but eh.

===Interfaces===

Schwarzgerät III: Difference between revisions

Dank (talk | contribs)

@@ Line 221: / Line 221: @@
 I love the [http://www.cabledeconn.com/Mini-SAS-Series-/SATA-Esata-list-138-160.html CableDeconn bunched SATA] data cables; they're definitely the only way to fly (assuming lack of SATA backplanes, which good luck in a workstation form factor). We end up with 4x 3.5 drives in the bay, 10x 3.5 drives in CaseLabs cages in the PSU side, 3x M.2 devices in the motherboard PCIe 4.0 slots, and 2x M.2 devices in the HyperX card. This leaves room for 2 more M.2s in the card, and 4x 2.5 devices in the smaller bay. The bottom 2 slots in the bottom hard drive cage are blocked by the PSU-side radiator; indeed, I had to take a hacksaw to said cage to get it into the machine.
-How to arrange 14 disks? I don't bother with solutions involving hot spares:
+How to arrange 14 disks so as to create a single volume? I don't bother with solutions involving hot spares:
 {| class="wikitable"
@@ Line 291: / Line 291: @@
 |}
-I went with a striped raidz2 for my 14 Exos drives (also known as a RAID60 in the Old English), yielding 180TB usable from 252TB total (71.4%). I suffer data loss if I lose any combination of 5 drives, and can lose data if I lose certain combinations of 3 drives (any combination where all three lost drives are in the same raid2z), but no rebuild ever involves more than seven drives. All filesystems are ZFS, and all storage enjoys some redundancy (save the 16GB Optane, which is just for persistent memory/DAX experiments).
+I went with a striped raidz2 for my 14 Exos drives (also known as a RAID60 in the Old English), yielding 180TB usable from 252TB total (71.4%). I suffer data loss if I lose any combination of 5 drives, and can lose data if I lose certain combinations of 3 drives (any combination where all three lost drives are in the same raid2z), but no rebuild ever involves more than seven drives. All filesystems are ZFS, and all storage enjoys some redundancy (save the 16GB Optane, which is just for persistent memory/DAX experiments). I could have split the volume and had two raidz2s with no interdependence, but eh.
 ===Interfaces===