Re: Disk I/O slowness
> On Jul 30, 2026, at 10:36 AM, Franco Martelli <martellif67@gmail.com> wrote:
>
> On 30/07/26 at 15:40, Casey Deccio wrote:
>>> If that motherboard is more recent than Debian Stable, the included Linux kernel might not support the C621A chipset and/or other chips on the board. Please check if the Linux kernel in Debian 13.6 has support for the Intel C621A chipset. Also check if there are bug reports for that combination. If support is lacking, or if there are issues, you might need a newer kernel from backports or you might need to run Testing.
>> Since it's a software RAID, I wonder if this might be the issue. I'll check the driver support to see what is in the kernel and also if there are proprietary drivers that Intel provides.
>
> Have you enabled "non-free-firmware" in /e/a/sources.list to install the required Intel firmware packages?
Yes, "non-free-firmware" is enabled, and there are plenty of intel packages installed and modules loaded, but I'm not sure which is helpful to this:
$ dpkg --list | grep intel
ii firmware-intel-graphics 20250410-2 all Binary firmware for Intel iGPUs and IPUs
ii firmware-intel-misc 20250410-2 all Binary firmware for miscellaneous Intel devices and chips
ii intel-microcode 3.20251111.1~deb13u1 amd64 Processor microcode firmware for Intel CPUs
$ lsmod | grep intel
intel_rapl_msr 20480 0
intel_rapl_common 53248 1 intel_rapl_msr
intel_uncore_frequency 12288 0
intel_uncore_frequency_common 16384 1 intel_uncore_frequency
intel_powerclamp 16384 0
kvm_intel 413696 0
kvm 1396736 1 kvm_intel
ghash_clmulni_intel 16384 0
snd_hda_intel 61440 0
snd_intel_dspcfg 40960 1 snd_hda_intel
snd_intel_sdw_acpi 16384 1 snd_intel_dspcfg
aesni_intel 122880 0
snd_hda_codec 217088 3 snd_hda_codec_generic,snd_hda_intel,snd_hda_codec_realtek
gf128mul 16384 1 aesni_intel
snd_hda_core 143360 4 snd_hda_codec_generic,snd_hda_intel,snd_hda_codec,snd_hda_codec_realtek
crypto_simd 16384 1 aesni_intel
cryptd 28672 2 crypto_simd,ghash_clmulni_intel
snd_pcm 188416 3 snd_hda_intel,snd_hda_codec,snd_hda_core
intel_cstate 20480 0
intel_uncore 266240 0
intel_th_gth 24576 0
snd 151552 7 snd_hda_codec_generic,snd_hwdep,snd_hda_intel,snd_hda_codec,snd_hda_codec_realtek,snd_timer,snd_pcm
intel_th_pci 12288 0
intel_th 28672 2 intel_th_gth,intel_th_pci
intel_vsec 20480 0
intel_pch_thermal 16384 0
intel_pmc_bxt 16384 1 iTCO_wdt
crc32c_intel 16384 5
>>> Does dmesg(1) report any error messages during transfers?
>> Not that I can see.
>
> To be absolutely sure please run:
>
> ~$ sudo journalctl -k -p 4 -b 0
Thanks. I ran it and also see nothing related there.
Casey
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