On Mon, Jan 05, 2009 at 05:43:23PM -0800, Elaine Ashton wrote:
> I've got a fresh install of 101a on a thumper with 48 disks and zfs with one 
> large 46 drive raidz2 pool. It has no load at the moment. My problem is that 
> the SUNWhd tools are excrutiatingly slow, by excrutiating I mean that the 
> command : "/opt/SUNWhd/hd/bin/hdadm write_cache display all" takes three 
> hours to iterate over the 48 drives which, I suspect, is not the expected 
> time for such a command to take. 

SunOS isis 5.10 Generic_138889-02 i86pc i386 i86pc
aka S10u6 with latest patches:

+ time -p hdadm display all
...
platform = Sun Fire X4500
...
real 9.90
user 0.04
sys 0.36

+ time -p sh /opt/SUNWhd/hd/bin/write_cache display all
...
real 104.67
user 14.89
sys 6.57

Regards,
jel.
-- 
Otto-von-Guericke University     http://www.cs.uni-magdeburg.de/
Department of Computer Science   Geb. 29 R 027, Universitaetsplatz 2
39106 Magdeburg, Germany         Tel: +49 391 67 12768
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