Re: Disk I/O slowness

> On Jul 29, 2026, at 6:51=E2=80=AFPM, David Christensen =
<[email protected]> wrote:
>=20
> What is the model number/ part number of your motherboard?

MBD-X12DPI-N6-O

>=20
> Have you disabled Intel PCH RAID in Setup -- e.g. so that the =
motherboard disk interface ports appear as non-RAID ports (SATA/SAS)?

No, I haven't tried that.

> How are the disk drives connected to the motherboard?  What is the =
speed rating of the cables?  Do the cables have locking connectors?  If =
you are using backplanes/ racks, what is their speed rating?

Thanks.  These are all good questions.  I don't have the cable specs or =
speed ratings on hand (and won't be able to check them for a few days, =
unfortunately), but they are the cables that came with the motherboard.  =
In the mean time, I'll try some of the other tests that you (and others) =
have kindly suggested.

As a point of reference, however, I built another machine with the same =
drives and cables (different motherboard), and I haven't experienced =
these issues.

> Have you run SMART long tests on each of the three disk drives in the =
RAID5?  If not, please do so now.  Please post the extended reports from =
the top through and including the end of the section "SMART Attributes =
Data Structure revision number: ...".

I've started the SMART long tests on the three drives in the RAID5.  It =
will take a few hours to run, so I'll report back.

> How are you transferring files?  Please post your console session.

=46rom a different machine:

$ sudo rsync -av /home/someuser root@newmachine:/home/

Thank you!
Casey=