problems writing on windows

problems writing on windows

[Carl Zwanzig]

Hello,

I'm having what sounds like the same problem reported by Dallas Clement back in April- writes to a physical drive don't seem to do anything:

C:\Users\Administrator>"\Program Files\fio\fio.exe" --name asd --filename=\\.\PhysicalDrive3 --rw=write --size=1g --bs=64k --thread
asd: (g=0): rw=write, bs=64K-64K/64K-64K/64K-64K, ioengine=windowsaio, iodepth=1

fio-2.0.12.2
Starting 1 thread

asd: (groupid=0, jobs=1): err= 0: pid=2108: Thu Jan 10 09:46:42 2013
  cpu          : usr=0.00%, sys=0.00%, ctx=0, majf=0, minf=0
  IO depths    : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     issued    : total=r=0/w=1/d=0, short=r=0/w=0/d=0

Run status group 0 (all jobs):

C:\Users\Administrator>

Read works as expected (there may be a bug in the ETA display but I'm ignoring that right now). Using fio-2.0.12.2 on windows 2008, running in a cmd box. Unfortunately, I don't have windows dev tools readily available, so I'd prefer to stay out of the code. Thoughts?

Thanks,

z!

Re: problems writing on windows

[Bruce Cran]

On 10/01/2013 18:00, Carl Zwanzig wrote:
> I'm having what sounds like the same problem reported by Dallas Clement back in April- writes to a physical drive don't seem to do anything

I don't know why bits of the output are missing - in 2.0.12.2 I'd expect 
an error message and a summary line at the bottom to be displayed.

I suspect the problem is that Windows blocks writes to areas of a raw 
disk which contain volumes.

-- 
Bruce Cran

RE: problems writing on windows

[Carl Zwanzig]

> From: Bruce Cran [mailto:bruce@cran.org.uk]
> Sent: Thursday, January 10, 2013 10:27 AM
> I suspect the problem is that Windows blocks writes to areas of a raw
> disk which contain volumes.

Almost. (z slaps head, should have checked this)

In Server Manager/Disk Management, Windows had the disks marked "offline". Setting the disk online, which makes it appear there as "not initialized", allows writing. Funny that you can read from an offline disk w/o error.

(Also, just setting the disk online with diskpart does not do it, had to use the GUI. Not going to investigate that at the moment.)

Is there any convenient way for fio to check that status and report an error?

Thanks,

z!