On 3/2/21 2:15 PM, Samuel Sieb wrote:
On 3/1/21 10:37 PM, Frederic Muller wrote:
I bought a rather cheap but not so cheap 1TB SSD drive advertised at
rw speeds of 450MB/s. I have 2 thinkpads, one X1 3rd gen and one X1
6th gen. Now here is what happened:
1. On 3rd gen laptop with F32 I tested (and made a full backup) :
45MB/s (NTFS)
2. I installed a the "brand new" F33, restored my backup and...:
85MB/s (NTFS)
3. Since I was a tad late updating I told myself let's do it on the
6th Gen too. Did a full backup on F32 at : ~400MB/s!!! (NTFS and ext4
- did several backups)
4. I installed a fresh new F33 and the restore speed was then...
50MB/s :-( (ext4)
5. I just restested the disk on the 3rd gen laptop and I am now
(ext4) at 45MB/s (I also just upgrade my BIOS to its latest version
for this test).
So I was wondering if there was any logical explanations and things I
could do to ensure I use the disk at its maximum speed.
There are a lot of factors and you've left out some details. Is this
internal or external. If external, then USB2 or USB3 (or something
else)?
As the title says it's indeed USB. Both machines have USB 3 ports, which
I used without any hub or middle man.
What are you using for the backup and restore? Even though there is
almost no seek delay, reading and writing lots of random files
involved a lot of IO operations. If you really want to test the
speed, you should use something like dd using a big blocksize.
dd if=/dev/zero of=/test.dat bs=8M count=1K
dd if=/test.dat of=/dev/null bs=8M
I used mainly the cp command line together with progress to get an idea
of the execution status. I also used the benchmark from Disk under
GNOME. The results are (were?) very consistent at each described phase.
And while I was not really testing per se (since I was ok with the
initial 45MB/s, I really noticed when it went to 80+ and then 400+ ...
and then down to 45.
Anyway since I am somehow back to initial lousy speeds and saw it way
faster on the same machines, is there a "reliable" way to go back to
more decent speed then?
Thank you.
Fred
_______________________________________________
users mailing list -- users@xxxxxxxxxxxxxxxxxxxxxxx
To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxxxxxxx
Fedora Code of Conduct:
https://docs.fedoraproject.org/en-US/project/code-of-conduct/
List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines
List Archives:
https://lists.fedoraproject.org/archives/list/users@xxxxxxxxxxxxxxxxxxxxxxx
Do not reply to spam on the list, report it:
https://pagure.io/fedora-infrastructure
_______________________________________________
users mailing list -- users@xxxxxxxxxxxxxxxxxxxxxxx
To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxxxxxxx
Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/
List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines
List Archives: https://lists.fedoraproject.org/archives/list/users@xxxxxxxxxxxxxxxxxxxxxxx
Do not reply to spam on the list, report it: https://pagure.io/fedora-infrastructure
