On my s10 u3 host connected to the FC storage with MPxIO and SVM I see the

It may be not related to the SC but I need to ask:

on my s10 u3 SC 3.1u4 node connected to the FC storage with MPxIO and SVM I see the non-zeroasvc_t when there is no I/O. Is there an explanation of this puzzle?

# iostat -znxXM 30

<...>

extended device statistics

r/sw/sMr/sMw/s wait actv wsvc_t asvc_t %w %b device

0.00.00.00.0 0.0 0.00.02.100 3/md1

0.00.00.00.0 0.0 0.00.01.800 4/md1

0.00.00.00.0 0.0 0.00.02.000 c4t0017380102200010d0

0.00.00.00.0 0.0 0.00.01.700 c4t0017380102200008d0

extended device statistics

r/sw/sMr/sMw/s wait actv wsvc_t asvc_t %w %b device

0.00.00.00.0 0.0 0.00.01.800 3/md1

0.00.00.00.0 0.0 0.00.01.700 4/md1

0.00.00.00.0 0.0 0.00.01.700 c4t0017380102200010d0

0.00.00.00.0 0.0 0.00.01.600 c4t0017380102200008d0

extended device statistics

r/sw/sMr/sMw/s wait actv wsvc_t asvc_t %w %b device

0.00.00.00.0 0.0 0.00.01.400 3/md1

0.00.00.00.0 0.0 0.00.01.500 4/md1

0.00.00.00.0 0.0 0.00.01.300 c4t0017380102200010d0

0.00.00.00.0 0.0 0.00.01.400 c4t0017380102200008d0

extended device statistics

r/sw/sMr/sMw/s wait actv wsvc_t asvc_t %w %b device

0.00.00.00.0 0.0 0.00.01.600 3/md1

0.00.00.00.0 0.0 0.00.01.600 4/md1

0.00.00.00.0 0.0 0.00.01.600 c4t0017380102200010d0

0.00.00.00.0 0.0 0.00.00.800 c4t0017380102200008d0

extended device statistics

r/sw/sMr/sMw/s wait actv wsvc_t asvc_t %w %b device

0.00.00.00.0 0.0 0.00.02.000 3/md1

0.00.00.00.0 0.0 0.00.01.700 4/md1

0.00.00.00.0 0.0 0.00.01.000 c4t0017380102200010d0

0.00.00.00.0 0.0 0.00.01.600 c4t0017380102200008d0

TIA,

-- leon

x-posted

[1759 byte] By [ckobopoga] at [2007-11-26 11:57:56]
# 1

I'm guessing a little here, but it could be one of two things:

1. Updates to the SVM state replica databases, though I'd expect to see some I/O values.

2. SCSI ioctls with no associated data, possible as part of the fencing mechanism. See man mhd.

May be Ashu has some other suggestions?

Tim

TimRead at 2007-7-7 12:18:37 > top of Java-index,Solaris Operating System,Solaris Essentials - General Technical Questions...