USB dock station for 5 disks

Dock station / External HDD case / RAID box for 5 disks (3.5" or 2.5" HDD/SSD with SATA interface)

FreeCAD source in attachment - customize for your needs!

Parts:

• USB Type-C to SATA controller: https://www.aliexpress.com/item/1005008121562331.html
• USB Type-C 90 degree adapter: https://www.aliexpress.com/item/1005005686397978.html
• 2 or 3 step-down 12v-to-5v modules (some disks can use up to 1A on start, these modules provide only 2, max 3A): https://www.aliexpress.com/item/32742116421.html?sku_id=67480809189
• 5x SATA cables with connector: https://www.aliexpress.com/item/1005005324049585.html?sku_id=12000032628416776
• 2x 80mm fan's (80x80x25mm or thinner)
• 4x2.5x10mm screws (for controller holder)
• 6x 3x25mm screws
• 5.5x2.1mm power jack (socket): https://www.aliexpress.com/item/32951908377.html
• Some 12v 8A+ power supply with 5.5x2.1mm connector (Check notes!)
• For case v1: 2x 80mm fan protection grill: https://www.aliexpress.com/item/1005004748401618.html?sku_id=12000030328445210 15x 2.5x10mm screws

Update (version 2):

• Improved caddy: easy to assembly, no more 2.5x10mm screws needed.
• Improved SATA connectors mount/holder.
• Improved back cover: Much easy for assembly (two versions: with ventilation grid and without).
• Optional: Fan's controller with thermal sensor: https://www.aliexpress.com/order-list/5520676807139743

Notes:

• On photos - outdated version (combination of v1 and v2). STL files contains improved model (v2).
• "Sockets holder Back" - print two of them
  "HDD Cage base" and "HDD Cage handle" - print 5 of each (one pair per disk)
• JMS580 is a "USB-to-SATA" converter, so speed limited by SATA-III specs (~600MB/s). You can use base board as USB-NGFF (M.2, Key-B SATA disk) converter, if need.
• JMS575 is a "1-to-5" port multiplier. When you access multiple disks - this controller spend lots of time for switch between ports and waiting for result, so speed was much lover, than you expected.
  For compare: ZFS zRaid-1 with 5 disks (~160MB/s per disk). Read/Write in/to file on ZFS partition.
  dd if=/dev/random of=/RAMDISK/test.bin bs=1M count=10000
dd if=/RAMDISK/test.bin of=/ZFS/test.bin bs=1M oflags=direct
dd if=/ZFS/test.bin of=/dev/null bs=1M iflags=direct
  JMS580+JMS575: 260 / 200 MB/s (Read/Write)
  ASM1166: 320 / 220 MB/s (Read/Write)
• Each HDD can consume up to 1A on 12v line and up to 1A on 5A line. But 5v we got from 12v line by dc-dc step-down converter (for conversion we use around 40-50% of current). So, we need around 1.5A per disk plus 0.2-0.5A per fan (check label on your fan). So, i recommend 12v/8A power supply. But you can use less powerful PS - just check your disk's power consumption and calculate your consumption, using this formula.