Berkeley CSUA MOTD:Entry 38365
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2025/07/08 [General] UID:1000 Activity:popular
7/8     

2005/6/29-30 [Computer/HW/Drives] UID:38365 Activity:low
6/29    Anyone tried using PATA and SATA drives in the same linux box?
        I've tried it twice, once with fedora core 2 and once with debian
        (both times with a 2.6 kernel) and in both cases the PATA drive(s)
        were REALLY slow (like 3 MB/sec read time).  Any ideas what I should
        do?  (other than "don't mix and match") -crebbs
        \_ Have you verified that it's the mixing in SATA that causes the
           slowdown?  Have you tried running it w/o the SATA?
           \_ indeed. On one box I installed just with the PATA drive, ran
              an hdparm got something like 56 MB/Sec read time, shutdown
              plugged in a SATA drive, booted back up and got 3 MB/Sec on hda
              the new sda drive was plenty fast though.
              all (u)dma settings stayed the same (as one would expect)
              on hda, but it just was WAY slower. -crebbs
                \_ funny, though, if i install with the sata in, it sees all
                   drives as sdx devices and seems to be o.k.  -crebbs
              \_ Are the SATA and PATA controllers sharing an IRQ?  Maybe
                 the SATA controller is sending an interrupt too aggresively?
2025/07/08 [General] UID:1000 Activity:popular
7/8     

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