On Sun, Sep 29, 2019 at 11:46:07AM -0400, 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 have encountered Kinston USB3 sticks that are incredibly slow too. Some of the cheap drives are complete garbage. -- Len Sorensen --- Post to this mailing list [email protected] Unsubscribe from this mailing list https://gtalug.org/mailman/listinfo/talk
