Red Hat Bugzilla – Bug 584751
Win7 guests: cannot enable disk caching on IDE disks
Last modified: 2013-07-03 21:50:50 EDT
Description of problem:
Although the option exist (Device Manager -> Disk Drives -> 'QEMU HARDDISJ ATA' -> right click -> Properties -> Policies) to enable write caching, once you check it you get an error that it cannot be set.
On XP/32, you can set this.
Version-Release number of selected component (if applicable):
Always - both on Win7/32 and Win7/64.
Steps to Reproduce:
Note that you never could enabled/disable the write cache under qemu. While return success for the SETFEATURES calls, we never take any action. I suspect the difference is that Win7 issues an IDENTIFY call later to check if we actually advertize a cache now.
Note that in recent qemu we will always advertize a write cache,
Yaniv, is this serious in any way? Even implementing changing the caching settings is not a high priority, and backporting to RHEL5 certainly isn't. I'm tempted to close this as WONTFIX.
I don't think it's serious, except for the user experience, where it appears he can do something, then gets a bit of an ugly error. If you don't want to fix it, close as WONTFIX. I guess there are more important bugs to fix.