* [Qemu-devel] [Bug 1070762] [NEW] savevm fails with inserted CD, "Device '%s' is writable but does not support snapshots."
@ 2012-10-24 9:58 Oliver Francke
2016-08-31 18:43 ` [Qemu-devel] [Bug 1070762] " John Snow
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: Oliver Francke @ 2012-10-24 9:58 UTC (permalink / raw)
To: qemu-devel
Public bug reported:
Hi,
yesterday unfortunately a customer reported a failed snapshot of his VM.
Going through the logfile I discovered:
"Device 'ide1-cd0' is writable but does not support snapshots"
this is with qemu-1.2.0 and 1.0.1 at least...
Why writeable?
Even if I specify "-drive ...,readonly=on,snapshot=off" to qemu the monitor-command sees the CD-ROM-device as being writeable?!
Somewhere I saw a "hint" for blockdev.c:
=== snip ===
--- /tmp/blockdev.c 2012-10-24 11:37:10.000000000 +0200
+++ blockdev.c 2012-10-24 11:37:17.000000000 +0200
@@ -551,6 +551,7 @@
case IF_XEN:
case IF_NONE:
dinfo->media_cd = media == MEDIA_CDROM;
+ dinfo->bdrv->read_only = 1;
break;
case IF_SD:
case IF_FLOPPY:
=== snap ===
after installing with this small patch applied it works, so insert CD, savevm <somename> succeeds.
This should be fixed at all correct places, and the tags "readonly=on,snapshot=off" should do it, too. Or even just work after specifying a drive being a CD-rom should do the trick ;-)
Another "bad habit" is, that the ISO/DVD-file has to be writeable to be
changed?
Thnx for attention and regards,
Oliver.
** Affects: qemu
Importance: Undecided
Status: New
--
You received this bug notification because you are a member of qemu-
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https://bugs.launchpad.net/bugs/1070762
Title:
savevm fails with inserted CD, "Device '%s' is writable but does not
support snapshots."
Status in QEMU:
New
Bug description:
Hi,
yesterday unfortunately a customer reported a failed snapshot of his
VM. Going through the logfile I discovered:
"Device 'ide1-cd0' is writable but does not support snapshots"
this is with qemu-1.2.0 and 1.0.1 at least...
Why writeable?
Even if I specify "-drive ...,readonly=on,snapshot=off" to qemu the monitor-command sees the CD-ROM-device as being writeable?!
Somewhere I saw a "hint" for blockdev.c:
=== snip ===
--- /tmp/blockdev.c 2012-10-24 11:37:10.000000000 +0200
+++ blockdev.c 2012-10-24 11:37:17.000000000 +0200
@@ -551,6 +551,7 @@
case IF_XEN:
case IF_NONE:
dinfo->media_cd = media == MEDIA_CDROM;
+ dinfo->bdrv->read_only = 1;
break;
case IF_SD:
case IF_FLOPPY:
=== snap ===
after installing with this small patch applied it works, so insert CD, savevm <somename> succeeds.
This should be fixed at all correct places, and the tags "readonly=on,snapshot=off" should do it, too. Or even just work after specifying a drive being a CD-rom should do the trick ;-)
Another "bad habit" is, that the ISO/DVD-file has to be writeable to
be changed?
Thnx for attention and regards,
Oliver.
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1070762/+subscriptions
^ permalink raw reply [flat|nested] 4+ messages in thread* [Qemu-devel] [Bug 1070762] Re: savevm fails with inserted CD, "Device '%s' is writable but does not support snapshots."
2012-10-24 9:58 [Qemu-devel] [Bug 1070762] [NEW] savevm fails with inserted CD, "Device '%s' is writable but does not support snapshots." Oliver Francke
@ 2016-08-31 18:43 ` John Snow
2020-07-28 1:34 ` John Snow
2020-09-26 4:17 ` Launchpad Bug Tracker
2 siblings, 0 replies; 4+ messages in thread
From: John Snow @ 2016-08-31 18:43 UTC (permalink / raw)
To: qemu-devel
** Changed in: qemu
Assignee: (unassigned) => John Snow (jnsnow)
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1070762
Title:
savevm fails with inserted CD, "Device '%s' is writable but does not
support snapshots."
Status in QEMU:
New
Bug description:
Hi,
yesterday unfortunately a customer reported a failed snapshot of his
VM. Going through the logfile I discovered:
"Device 'ide1-cd0' is writable but does not support snapshots"
this is with qemu-1.2.0 and 1.0.1 at least...
Why writeable?
Even if I specify "-drive ...,readonly=on,snapshot=off" to qemu the monitor-command sees the CD-ROM-device as being writeable?!
Somewhere I saw a "hint" for blockdev.c:
=== snip ===
--- /tmp/blockdev.c 2012-10-24 11:37:10.000000000 +0200
+++ blockdev.c 2012-10-24 11:37:17.000000000 +0200
@@ -551,6 +551,7 @@
case IF_XEN:
case IF_NONE:
dinfo->media_cd = media == MEDIA_CDROM;
+ dinfo->bdrv->read_only = 1;
break;
case IF_SD:
case IF_FLOPPY:
=== snap ===
after installing with this small patch applied it works, so insert CD, savevm <somename> succeeds.
This should be fixed at all correct places, and the tags "readonly=on,snapshot=off" should do it, too. Or even just work after specifying a drive being a CD-rom should do the trick ;-)
Another "bad habit" is, that the ISO/DVD-file has to be writeable to
be changed?
Thnx for attention and regards,
Oliver.
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1070762/+subscriptions
^ permalink raw reply [flat|nested] 4+ messages in thread* [Bug 1070762] Re: savevm fails with inserted CD, "Device '%s' is writable but does not support snapshots."
2012-10-24 9:58 [Qemu-devel] [Bug 1070762] [NEW] savevm fails with inserted CD, "Device '%s' is writable but does not support snapshots." Oliver Francke
2016-08-31 18:43 ` [Qemu-devel] [Bug 1070762] " John Snow
@ 2020-07-28 1:34 ` John Snow
2020-09-26 4:17 ` Launchpad Bug Tracker
2 siblings, 0 replies; 4+ messages in thread
From: John Snow @ 2020-07-28 1:34 UTC (permalink / raw)
To: qemu-devel
Very old bug. If anyone sees this behavior, please re-file against a
supported release (5.0 at time of writing, soon to be 5.1) and please
paste a full command-line and steps to reproduce.
(To my knowledge, this bug is not present in modern QEMU builds, but do
not know when it would have changed.)
--js
** Changed in: qemu
Status: New => Incomplete
** Changed in: qemu
Assignee: John Snow (jnsnow) => (unassigned)
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1070762
Title:
savevm fails with inserted CD, "Device '%s' is writable but does not
support snapshots."
Status in QEMU:
Incomplete
Bug description:
Hi,
yesterday unfortunately a customer reported a failed snapshot of his
VM. Going through the logfile I discovered:
"Device 'ide1-cd0' is writable but does not support snapshots"
this is with qemu-1.2.0 and 1.0.1 at least...
Why writeable?
Even if I specify "-drive ...,readonly=on,snapshot=off" to qemu the monitor-command sees the CD-ROM-device as being writeable?!
Somewhere I saw a "hint" for blockdev.c:
=== snip ===
--- /tmp/blockdev.c 2012-10-24 11:37:10.000000000 +0200
+++ blockdev.c 2012-10-24 11:37:17.000000000 +0200
@@ -551,6 +551,7 @@
case IF_XEN:
case IF_NONE:
dinfo->media_cd = media == MEDIA_CDROM;
+ dinfo->bdrv->read_only = 1;
break;
case IF_SD:
case IF_FLOPPY:
=== snap ===
after installing with this small patch applied it works, so insert CD, savevm <somename> succeeds.
This should be fixed at all correct places, and the tags "readonly=on,snapshot=off" should do it, too. Or even just work after specifying a drive being a CD-rom should do the trick ;-)
Another "bad habit" is, that the ISO/DVD-file has to be writeable to
be changed?
Thnx for attention and regards,
Oliver.
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1070762/+subscriptions
^ permalink raw reply [flat|nested] 4+ messages in thread* [Bug 1070762] Re: savevm fails with inserted CD, "Device '%s' is writable but does not support snapshots."
2012-10-24 9:58 [Qemu-devel] [Bug 1070762] [NEW] savevm fails with inserted CD, "Device '%s' is writable but does not support snapshots." Oliver Francke
2016-08-31 18:43 ` [Qemu-devel] [Bug 1070762] " John Snow
2020-07-28 1:34 ` John Snow
@ 2020-09-26 4:17 ` Launchpad Bug Tracker
2 siblings, 0 replies; 4+ messages in thread
From: Launchpad Bug Tracker @ 2020-09-26 4:17 UTC (permalink / raw)
To: qemu-devel
[Expired for QEMU because there has been no activity for 60 days.]
** Changed in: qemu
Status: Incomplete => Expired
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1070762
Title:
savevm fails with inserted CD, "Device '%s' is writable but does not
support snapshots."
Status in QEMU:
Expired
Bug description:
Hi,
yesterday unfortunately a customer reported a failed snapshot of his
VM. Going through the logfile I discovered:
"Device 'ide1-cd0' is writable but does not support snapshots"
this is with qemu-1.2.0 and 1.0.1 at least...
Why writeable?
Even if I specify "-drive ...,readonly=on,snapshot=off" to qemu the monitor-command sees the CD-ROM-device as being writeable?!
Somewhere I saw a "hint" for blockdev.c:
=== snip ===
--- /tmp/blockdev.c 2012-10-24 11:37:10.000000000 +0200
+++ blockdev.c 2012-10-24 11:37:17.000000000 +0200
@@ -551,6 +551,7 @@
case IF_XEN:
case IF_NONE:
dinfo->media_cd = media == MEDIA_CDROM;
+ dinfo->bdrv->read_only = 1;
break;
case IF_SD:
case IF_FLOPPY:
=== snap ===
after installing with this small patch applied it works, so insert CD, savevm <somename> succeeds.
This should be fixed at all correct places, and the tags "readonly=on,snapshot=off" should do it, too. Or even just work after specifying a drive being a CD-rom should do the trick ;-)
Another "bad habit" is, that the ISO/DVD-file has to be writeable to
be changed?
Thnx for attention and regards,
Oliver.
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1070762/+subscriptions
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2020-09-26 4:31 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2012-10-24 9:58 [Qemu-devel] [Bug 1070762] [NEW] savevm fails with inserted CD, "Device '%s' is writable but does not support snapshots." Oliver Francke
2016-08-31 18:43 ` [Qemu-devel] [Bug 1070762] " John Snow
2020-07-28 1:34 ` John Snow
2020-09-26 4:17 ` Launchpad Bug Tracker
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