asteroza + density + sas   1

Evtron | Next generation storage platform
Currently their device, called CELL,is a 4U oversize (length is 45 inches, current standard is 42 (38-48) inches) DAS, mounting 120 3.5 inch SAS HDD. Appears to use 5x24port SAS backplanes. Claims to use a proprietary heatsink/mount system, ostensibly to reduce the airgaps needed for cooling to increase density. No pictures of the insides, so can't tell if hot swappable.

Still, looking at the Backblaze StoragePod for comparison (if not hotswap) which has 15 disks per row in 3 rows, you are looking at maybe 16 disks per row for a exceptionally tight setup, but that comes out to 7.5 rows. If you look at a DataON DNS-1660 (with hotswap), it has 12 disks per row in 5 rows, and roughly 20 inches consumed, so 120 disks would consume 40 inches. Which makes me think it is not hotswappable in the normal sense, to cut down on hotswap caddy tray space consumption, and still leave enough room for for the PSU's. Maybe some backplane chip layout tricks to shorten the length.
devices.  electronics  hardware  DAS  120  3.5inch  3.5  oversize  rackmount  shelf  storage  drive  hard  JBOD  SAS2  SAS  density  high  cell  Evtron  devices  Delicious 
november 2012 by asteroza

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