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A USB Stick as an SSD? A New Silicon Motion SM3282 Single-Chip Controller for USB SSDs
Silicon Motion has introduced its first single-chip controller for portable USB SSDs. The SM3282 promises to enable makers of portable drives to offer up to 400 MB/s sequential read speeds in a cost-efficient manner previously unachievable by external SSDs.
[...] Previously, makers of external SSDs had to use a USB-to-PCIe bridge alongside an SSD controller to build their products, which greatly increased BOM costs as well as the final price. The SM3282 packs all the necessary functionality into a single chip and thus reduces BOM cost of external SSDs.
SSD - Solid State Drive
BOM - Bill of Materials
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Silicon Motion Controller to Enable High Speed, Low Cost Portable USB SSDs
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Cole's Law:
Thinly sliced cabbage.
(Score: 1, Interesting) by Anonymous Coward on Sunday June 02 2019, @03:25AM
oh oh ... always so negatif.
pretty sure usb 3.x is faster then regular SATA 3 (6Gb).
also the article mentioned said ">400 MB/sec" not ">400 Mbps" (~50 MB/sec), so that's already very close to SATA III.
probably there's room for improvement tho it will probably (?) never reach the bandwidth of a NVme connected via PCiE?
however, if for some reason the computer needs fast (cheap) storage and hasn't got the win-bios -aka- UEFI then chances are really good
that a old-skool BIOS will be able to boot from a USB3 port without having to inject a driver into the BIOS-firmware or such and having to use two cables (power and SATA)!
also, methinks, from a engineering(?) standpoint that 4-pin connector USB3.0 with THOSE speeds versus the more then 4 pins on a NVme is ... amazing.
lastly, most USB3 comes with at least 1 meter of cable length and are mostly also accessible from the "outside" whilst NVme is pretty well tucked away inside a case?
not sure how the (formarly) "southbridge" shares all the I/O bandwidth but if usb3 SSDs become as fast as SATA3 SSDs then we can disable the SATA3 in BIOS and free up some of those I/O lanes?
the new "steam VR index" (left eye monitor: 1440 x 1600 / right eye monitor: 1440 x 1600) recommends a USB3 port so if the CPU has 16 I/O lanes and some from the chipset, being able to disable some I/O like SATA will probably help latency when the single GPU already gobbels up ALL I/O lanes from the CPU and all that is left is from the chipset?