Re:USB memory sticks are getting worse
by jsheard on Wednesday February 14, 2024 @08:42PM
(#39378132)
Thankfully NVMe enclosures are dirt cheap now, so if you can deal with a little more bulk you can adapt an SSD from any reputable manufacturer into an extremely fast and reliable USB drive. Ideally look for an SSD with onboard DRAM though - drives without their own DRAM typically borrow memory from the host instead, but that trick doesn't work over USB, so their performance is degraded.
Re:USB memory sticks are getting worse
by jsheard on Thursday February 15, 2024 @07:26AM
(#39381849)
It will depend on the SSD controller, but AFAIK the DRAM usually isn't used for write caching. It's used to hold a copy of the bookkeeping structures which map virtual block locations to physical flash locations, which are mirrored on the non-volatile flash anyway, but are much quicker to random-read from DRAM.
If you use a DRAM-less drive in a situation where it can't DMA host memory, such as in a USB enclosure, it has to read those structures from flash on-the-fly which is obviously slower.
Re:USB memory sticks are getting worse
by cool_beanz on Wednesday February 14, 2024 @10:28PM
(#39378759)
>If flash media is to be used to store anything for an extended period, use high-quality storage hardware, and keep it somewhere cool, as high temperatures may accelerate data loss.
Re:USB memory sticks are getting worse
by calamari4065 on Wednesday February 14, 2024 @11:14PM
(#39379036)
You'll find counterfeit chips stamped with a legit part number, you get blank chips that never had markings, and sometimes they even go to the ridiculous step of using a laser to etch away all the existing markings.
Most of the time it only makes it a little more difficult to reverse engieer what the part is.
If you use a DRAM-less drive in a situation where it can't DMA host memory, such as in a USB enclosure, it has to read those structures from flash on-the-fly which is obviously slower.
Interesting, I never thought of that.
pretty sure they are fake chips that never had a logo... usually they print a fake logo though, don't they?
Most of the time it only makes it a little more difficult to reverse engieer what the part is.
Then they became a lot cheaper as the market flooded and even the old reliable brands went downhill.
Eventually I had some that were 10+ years old and worked flawlessly, while other new ones would fail after a month or so.