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Re: [Qemu-devel] [RFC] Disk integrity in QEMU
From: |
Jamie Lokier |
Subject: |
Re: [Qemu-devel] [RFC] Disk integrity in QEMU |
Date: |
Mon, 13 Oct 2008 00:00:07 +0100 |
User-agent: |
Mutt/1.5.13 (2006-08-11) |
Avi Kivity wrote:
> The IDE write cache is not susceptible to software failures (well it is
> susceptible to firmware failures, but let's ignore that). It is likely
> to survive reset and perhaps even powerdown. The risk window is a few
> megabytes and tens of milliseconds long.
Nonetheless, from yanking the power relatively often while using ext3
(this is on a host only, no qemu involved) I've seen a number of
corruption cases, and these all went away when the IDE write cache was
disabled, or when IDE write barriers were used.
This is a failure case which happens in real life, but not often if
you don't often yank the power during writes.
Just so you know.
-- Jamie
- [Qemu-devel] [RFC] Disk integrity in QEMU, Anthony Liguori, 2008/10/09
- Re: [Qemu-devel] [RFC] Disk integrity in QEMU, Aurelien Jarno, 2008/10/10
- Re: [Qemu-devel] [RFC] Disk integrity in QEMU, Anthony Liguori, 2008/10/10
- Re: [Qemu-devel] [RFC] Disk integrity in QEMU, Paul Brook, 2008/10/10
- Re: [Qemu-devel] [RFC] Disk integrity in QEMU, Anthony Liguori, 2008/10/10
- Re: [Qemu-devel] [RFC] Disk integrity in QEMU, Paul Brook, 2008/10/10
- Re: [Qemu-devel] [RFC] Disk integrity in QEMU, Avi Kivity, 2008/10/10
- Re: [Qemu-devel] [RFC] Disk integrity in QEMU, Jens Axboe, 2008/10/17
- Re: [Qemu-devel] [RFC] Disk integrity in QEMU, Avi Kivity, 2008/10/19
- Re: [Qemu-devel] [RFC] Disk integrity in QEMU, Aurelien Jarno, 2008/10/10
Re: [Qemu-devel] [RFC] Disk integrity in QEMU, Avi Kivity, 2008/10/10