12-05-2011
1. How you are calculating those Mb/s are you using topas/nmon or you are calculating time vs MB
2. Are those MB or Mb there is like 8x difference
3. Which dd parameters you're using ?
What is block side on fs?
What is pp size ?
Raw will be always faster but if you set FS for 512Bytes block size and 16MB pp size and you should see quite similar values,
for sure you will see something about 200MB/s
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LEARN ABOUT OPENSOLARIS
pvscan
PVSCAN(8) System Manager's Manual PVSCAN(8)
NAME
pvscan - scan all disks for physical volumes
SYNOPSIS
pvscan [-d|--debug] [-h|--help] [-v|--verbose] [--version] [--ignorelockingfailure] [-e|--exported] [-n|--novolumegroup] [-s|--short]
[-u|--uuid]
pvscan [-d|--debug] [-h|--help] --cache [--major major --minor minor | DevicePath ] ...
DESCRIPTION
pvscan scans all supported LVM block devices in the system for physical volumes.
OPTIONS
See lvm(8) for common options.
-e, --exported
Only show physical volumes belonging to exported volume groups.
-n, --novolumegroup
Only show physical volumes not belonging to any volume group.
-s, --short
Short listing format.
-u, --uuid
Show UUIDs (Uniform Unique Identifiers) in addition to device special names.
--cache [ --major major --minor minor | DevicePath ] ...
Scan one or more devices and instruct the lvmetad daemon to update its cached state accordingly. Called internally by udev rules.
All devices listed explicitly are processed regardless of any device filters set in lvm.conf.
SEE ALSO
lvm(8), pvcreate(8), pvdisplay(8)
Sistina Software UK LVM TOOLS 2.02.95(2) (2012-03-06) PVSCAN(8)