649189 - Need a tool to flush cache on windows

Status: RESOLVED WONTFIX

(Testing :: Talos, defect)

Description

[(dormant account)]

Need something like http://support.microsoft.com/kb/311272 where we'd say
remount d:\
and the tool would figure out the underlying drive and disable/enable it to flush the associated caches

Comment 1

[alice nodelman [:alice] [:anode]]

This looks a lot like bug 522807.

Comment 2

[alice nodelman [:alice] [:anode]]

Oh sorry, you are using this as a blocking bug.  Nevermind.

Comment 3

[(dormant account)]

(In reply to comment #2)
> Oh sorry, you are using this as a blocking bug.  Nevermind.

Yeah, we need to write you a tool so talos can do the test.

Comment 4

[Katelyn Gadd (:kael)]

The tool I built for this is located at https://github.com/kevingadd/DeviceRemount . Unfortunately, it doesn't seem to flush all the caches we care about, so a more complex approach is necessary. 

The current version of the tool works by disabling and then enabling the individual storage volume associated with a disk drive. In some cases Windows seems to leave the actual physical storage device active, and it's possible that it is failing to flush caches built into the storage device or leaving cached pages in memory.

Comment 5

[Joel Maher ( :jmaher ) (UTC -8)]

I am unclear how this will work with talos.  This is a year old and I haven't seen traction on this.  Please outline the next steps for talos or lets close this bug.

Comment 6

[(dormant account)]

This does seem feasible on windows

Comment 7

[(dormant account)]

Now that I wontfixed this, kael pointed me at http://technet.microsoft.com/en-us/sysinternals/bb897561