XPost: linux.debian.bugs.dist   
   From: snow.wolf.29@proton.me   
      
   On Wednesday, 14 January 2026 at 18:25, Niklas Cassel    
   wrote:   
      
   >   
   > It is quite unexpected that 4096 KiB passes.   
   >   
   > find-max-sectors.sh performs reads.   
   >   
   > The commands that timed out according to dmesg shared were   
   > also reads:   
   >   
   > Dec 10 18:58:49 kernel: ata1.00: failed command: READ FPDMA QUEUED   
   > Dec 10 18:58:49 kernel: ata1.00: cmd 60/00:18:50:4a:4c/20:00:0c:00:00/40 tag   
   3 ncq dma 4194304 in res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4   
   (timeout)   
   >   
   > And also of size 4194304 == 4096 KiB.   
   >   
   >   
   > The script has been able to detect different limits for other   
   > "broken" drives, and was used to get the quirk value for e.g.   
   > commit 2e9832713631 ("ata: libata-core: Quirk DELLBOSS VD max_sectors"),   
   > so I wonder why it is not workin here (why 4 MiB reads passes).   
   >   
   > Damien, ideas?   
   >   
   >   
   > Kind regards,   
   > Niklas   
      
      
   Hi, Niklas   
      
   Udev rule   
      
   ACTION=="add|change", SUBSYSTEM=="block", KERNEL=="sda", ATTR{qu   
   ue/max_sectors_kb}="4096"   
      
   is not working.   
      
      
   Regards,   
   Wolf   
      
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