On 9/29/19 11:46 AM, D. Hugh Redelmeier via talk wrote:
I bought some inexpensive SanDisk Cruzer Glide 16GB USB sticks from
Walmart last year. Cheap.
Today I copied the CentOS 8 installation image onto one.
time sudo dd if=CentOS-8-x86_64-1905-dvd1.iso of=/dev/sdg oflag=direct bs=16M
(I used a USB 3 port on my dessktop.)
It seemed to take a long time, so I did this to see if anything was
happening (the dd process' PID was 29047):
sudo kill -s USER1 29047
Yes, there was progress, but not as much as I would expect. The final
statistics were:
425+1 records in
425+1 records out
7135559680 bytes (7.1 GB, 6.6 GiB) copied, 1560.63 s, 4.6 MB/s
real 26m4.152s
user 0m0.072s
sys 0m4.706s
This amounts to about 4.56 MB/s. That's even less than the poor
Average Sustained Write Speed 7.64 MB/s reported here:
<https://usb.userbenchmark.com/SpeedTest/2718/SanDisk-Cruzer-Glide>
Note: this stick hasn't been written to often. It should not be near the
end of its life (that could slow down a flash device).
I've not needed a new flash drive in awhile but I liked the higher
perfomance
Kingston and Corsair drives. Not sure how much they are but last thing I
checked it was pretty expensive at around 80 dollars for 128GB. Then again
the speeds were good i.e. 250MBS write that it did hit and around 150MBS
writes. Through if your looking for speed these are amazing as almost as
fast as a SATA 3 SSD around 100MBS slower.
https://www.amazon.ca/Corsair-Flash-Voyager-256GB-Premium/dp/B079NWJTGG/ref=asc_df_B079NWJTGG/?tag=googleshopc0c-20&linkCode=df0&hvadid=292955488960&hvpos=1o1&hvnetw=g&hvrand=3699258915644707733&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9061009&hvtargid=pla-473498336284&psc=1
And yes they do hit though speeds to my knowledge.
Nick
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