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Bernd Oelker
Kernel 6.12.X slow HDD performance on golfex home
February 18, 2025 05:55PM
Hallo,

I download the 6.12.6 kernel, use all vanilla patches until 6.12.14 and use debian bookworm on this old devices ..
While network speed via iperf3 measures are ok (90 MBytes/sec) the HDD speed (/dev/sda) is really worse !!
I got about 15-22 MByte/sec by doing dd if=/dev/sda of=/dev/null bs=1024k status=progress ...
I got two devices, and if I go back to 5.15.121 (also from here) I got about 120-135 MByte / sec (2 TB HDD)
with the above dd command ...
Any suggestions about this very large change ??
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bodhi
Re: Kernel 6.12.X slow HDD performance on golfex home
February 19, 2025 04:17AM
Bernd Oelker, 

cat /etc/debian_version
dmesg

Do the benchmark. 

hdparm -Tt /dev/sda

And then 
dmesg |tail -50

-bodhi
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