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** Changed in: linux (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1561830
Title:
Hard disk writes fail in 16.04 daily on nForce 430
Status in linux package in Ubuntu:
Incomplete
Bug description:
I have an old PC I use for testing new operating systems. It has
previously had Ubuntu 15.10 installed and working. The motherboard is
an Asus M2NPV-VM, with Nvidia nForce 430 chipset and Nvidia GeForce
6150 GPU. I have installed an Nvidia GT220 card to use for more
modern video support.
When I attempt to install Ubuntu 16.04 beta (daily xenial-desktop-
amd64.iso file downloaded 24/03/2016 18:17), it starts to write to
the hard disk (Samsung HD103UJ), and after a short time the install
got lots of disk write errors in kern.log. After the errors, the disk
was unable to be read either, with "fdisk -l /dev/sda" failing to read
a sector, where it had worked before starting the install. Unplugging
the SATA cable to the drive and plugging it in again made the drive
work again (on /dev/sdc), but another attempt to install failed with
the same write errors.
I noticed that the log had swap write errors also, so I rebooted the
install DVD again, and this time did a "swapoff -a" command before
attempting to install, but got the same errors again. So I found my
Ubuntu 15.10 install DVD and tried a new install from that, which
worked just fine.
On rebooting with my 16.04 daily DVD, I again did "swapoff -a" so that
the DVD based system would run normally, then tried mounting the EXT4
system partition I had just installed using the 15.10 install DVD.
That worked, so I tried dd commands to do test writes to that
partition. The following commands worked:
dd if=/dev/zero of=/mnt/sda8/tmp/output bs=8k count=10k
dd if=/dev/zero of=/mnt/sda8/tmp/output bs=8k count=100k
but when I did this command:
dd if=/dev/zero of=/mnt/sda8/tmp/output bs=8k count=1000k
after a while errors started appearing in kern.log, just as with the
attempts to install 16.04.
It appears that with sustained write activity, the errors will start
and then the drive will become unusable until it is unplugged and
plugged in again.
I have attached the kern.log and syslog files from the 15.10 install
that worked, and the 16.04 install attempt that failed. The first
error message appears to be this:
ata3: EH in SWNCQ mode,QC:qc_active 0x1FFF sactive 0x1FFF
ata3: SWNCQ:qc_active 0x1 defer_bits 0x1FFE last_issue_tag 0x0
dhfis 0x1 dmafis 0x0 sdbfis 0x0
which leads me to suspect a problem with the handling of the SATA
controller's interrupts.
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