On Thu, Mar 06, 2008 at 04:32:38PM +0000, Stuart Henderson wrote:
> On 2008-03-06, Jose Fragoso <[EMAIL PROTECTED]> wrote:
> > Hi, Stuart! Thanks for the hint. # scsi -f /dev/rsd0c -m 8
> > IC:  0
> > ABPF:  0
> > CAP:  0
> > DISC:  1
> > SIZE:  0
> > WCE:  0
> > MF:  0
> > RCD:  0
> > Demand Retention Priority:  0
> > Write Retention Priority:  0
> > Disable Pre-fetch Transfer Length:  65535
> > Minimum Pre-fetch:  0
> > Maximum Pre-fetch:  65535
> > Maximum Pre-fetch Ceiling:  65535
> > WCE being 0, means it is not enabled?
> 
> Correct
> 
> > If so, how can one enable it?
> 
> As far as I know, you should normally have write cache disabled
> on SCSI. I don't see how this can account for 10 seconds to update
> a dir entry...
> 
> You can edit the code page with scsi(8). This change is saved
> permanently. But I think you should leave it alone.

It is save to use.  This is just mfgs being conservative.  Got a UPS?
use it!

> 
> > From
> > top, I see mv goes to sleep state. On the WAIT, it showsgetblk. CPU usage
> > is 0.05%. Thanks in advance for any help. Regards, Josi
> 
> "What does top say? look at what state mv is in, **> WHAT CPU% IS USED
> IN INTERRUPT <**, whether there's something else running that hits the
> disks."
> 
> Can you just paste in all the top output while it's running?
> (top|cat is easy to paste).

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