On 1/9/20 5:41 PM, Gene Heskett wrote:
On Thursday 09 January 2020 19:13:56 R C wrote:
if you use USB connected drives on a Pi, and also the network, you're
switching
between eth/wifi and USB "A LOT" (it uses the same hardware/chipset).
If you power the
No wifi, its disabled.
But are you using ethernet, the wired connection?
drives through USB that is not a good thing. For modest amounts of
data I just use a/the
I have a 5 amp supply, and these adapters have no provision for external
power. However, one should never forget that that, and a couple bucks
will get you a fresh cuppa most anyplace but Starbucks. ;-)
It's not about the power availability really, the issue is it switching
back and forth between USB/network in an ARM arch, there is no real way
for switching priorities, buffering AND keep devices powered/running.
When you use the network, the USB part gets ignored, almost shut off, and
the other way around. ARM is more about streams, unlike interrupt things
where "devices" keep being powered and given priority.
So network IO might shut your disk off.. and then back on.. a lot.
an SSD uses between 1.5W-2.5W I believe, which in PI terms is a lot. An
SD card
on the other hand just uses a tiny fraction of that and it can handle
that, like your phone and your camera, iPod etc etc
SD card (the video/photo ones can handle a lot more writes than
standard ones) or I use NFS
when I need larger data sets).
(I run a seismograph on a PI, it does data collection, and 24/7 sends
data to a database
every 1-2 seconds and never had issues.)
Ron
On 1/9/20 10:24 AM, Gene Heskett wrote:
Greetings all;
Back in the middle of May 2019, I ordered, from newegg.com, three
240GB SSD's and 3 rosewill usb-3.1 to sata adapter cables so I could
use them as std drives on my pi's.
All of the rosewell adapters have now died. Called newegg, got run
around, hit tigerdirect and had 4 startech's at about 5 bucks more
ordered in less that 5 minutes. We'll see how they work.
So right now newegg and rosewill are bad kharma to me.
Cheers, Gene Heskett
Cheers, Gene Heskett
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