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[Bug 1622582] Re: Can't install Windows 7 with q35 (SATA)
From: |
Thomas Huth |
Subject: |
[Bug 1622582] Re: Can't install Windows 7 with q35 (SATA) |
Date: |
Fri, 30 Apr 2021 16:45:52 -0000 |
This is an automated cleanup. This bug report has been moved
to QEMU's new bug tracker on gitlab.com and thus gets marked
as 'expired' now. Please continue with the discussion here:
https://gitlab.com/qemu-project/qemu/-/issues/55
** Changed in: qemu
Status: Confirmed => Expired
** Changed in: qemu
Assignee: John Snow (jnsnow) => (unassigned)
** Bug watch added: gitlab.com/qemu-project/qemu/-/issues #55
https://gitlab.com/qemu-project/qemu/-/issues/55
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https://bugs.launchpad.net/bugs/1622582
Title:
Can't install Windows 7 with q35 (SATA)
Status in QEMU:
Expired
Bug description:
I'm trying to install Windows 7 on a q35 machine on a "SATA disk". If
I use q35 the installation is extremely slow. With extremely slow I
mean, that the first few minutes (10-15 minutes) on the second
installation step (copying files to disk) nothing happens. Than there
is some progress, maybe until 9% and than there is "silence" for
another 10 minutes or so. Therefore I used iotop (with --only option)
in order to see, if there are any disk operations. But as I mentioned,
only a few times qemu writes something to disk (with about < 1M/s).
But most of the time there is nothing from qemu. Therefore the
installation lasts over an hour. But even worse, after installation I
can't boot Windows. Windows-Start-Manager tells me, that windows
couldn't be loaded because the kernel is missing or corrupt (Status
0xc0000221, File: \Windows\system32\ntoskrnl.exe). If I use IDE on q35
or pc-i440fx-2.6 everything works fine. There is a continuous
installation progress and iotop shows continuous disk writes with max
30M/s (but also 5M/s and other values...).
I've tried qemu 2.6.0, 2.6.1 and 2.7.0 (all versions from git).
My host machine:
Ubuntu 14.04.5 LTS
3.13.0-95-generic #142-Ubuntu SMP Fri Aug 12 17:00:09 UTC 2016 x86_64 x86_64
x86_64 GNU/Linux
Intel(R) Core(TM) i5-3470 CPU
16 GB RAM
I used the following commands:
"Standard" command
qemu-system-x86_64 -m 2048 -machine q35,accel=kvm -cpu host,kvm=off -smp
1,sockets=1,cores=1,threads=1 -enable-kvm -hda win7_qemu_standard_q35.qcow2
-cdrom win7proX64.iso -boot order=d
I think by using -hda sata will be used?!?
With explicit ahci:
qemu-system-x86_64 -m 2048 -machine q35,accel=kvm -cpu host,kvm=off -smp
1,sockets=1,cores=1,threads=1 -enable-kvm -drive
file=win7_qemu_standard_q35.qcow2,media=disk,if=none,id=sata-disk -device
ich9-ahci,id=ahci -device ide-drive,drive=sata-disk,bus=ahci.0 -drive
file=win7proX64.iso,media=cdrom,if=none,id=sata-cdrom -device
ide-cd,drive=sata-cdrom,bus=ahci.1 -boot order=d
I don't know if this is totally correct, because it's a little bit
weird that I have to use ide-drive on a ich9 bus.
Without kvm there is a continious disk write with 100 K/s - 5 M/s (works only
with qemu 2.7.0, otherwise I get a 0x000000D1 bluescreen on the setup start
screen):
qemu-system-x86_64 -m 2048 -machine q35 -cpu IvyBridge -hda
win7_qemu_standard_q35.qcow2 -cdrom win7proX64.iso -boot order=d
But with all three commands the installed Windows is not working,
because always the same error occurs: windows couldn't be loaded
because kernel is missing or corrupt
Interestingly both commands ("standard" command and with explicit
ahci) works very well with a Windows 10 installation.
In my opinion it's a "SATA problem", because if I use e.g. piix4-ide instead
of ich9-ahci it works:
qemu-system-x86_64 -m 2048 -machine q35,accel=kvm -cpu host,kvm=off -smp
1,sockets=1,cores=1,threads=1 -enable-kvm -drive
file=win7_qemu_standard_q35.qcow2,media=disk,if=none,id=ide-disk -device
piix4-ide,id=ide -device ide-drive,drive=ide-disk,bus=ide.0 -drive
file=win7proX64.iso,media=cdrom,if=none,id=ide-cdrom -device
ide-cd,drive=ide-cdrom,bus=ide.1 -boot order=d
With this command there is a continuous disk write and the
installation is bootable.
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