09-24-2014
Quote:
Originally Posted by
gull04
Hi,
I don't think that this is really a suitable way to evaluate the performance of any RAID as it's all on one physical disk.
Regards
Dave
I agree with you. I actually gave it a try because I didn't have any other setup available to test. But in theory (leaving VirtualBox aside, and if I had the actual physical drives available), reads should be ~twice as fast, and writes about as fast as RAID1, am I correct?
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LEARN ABOUT FREEBSD
pvchange
PVCHANGE(8) System Manager's Manual PVCHANGE(8)
NAME
pvchange - change attributes of a physical volume
SYNOPSIS
pvchange [--addtag Tag] [-A|--autobackup y|n] [-d|--debug] [-f|--force] [--deltag Tag] [--metadataignore y|n] [-h|-?|--help] [-t|--test]
[-v|--verbose] [-a|--all] [-x|--allocatable y|n] [-u|--uuid] [PhysicalVolumePath...]
DESCRIPTION
pvchange allows you to change the allocation permissions of one or more physical volumes.
OPTIONS
See lvm for common options.
-a, --all
If PhysicalVolumePath is not specified on the command line all physical volumes are searched for and used.
--metadataignore y|n
Ignore or un-ignore metadata areas on this physical volume. If metadata areas on a physical volume are ignored, LVM will not not
store metadata in the metadata areas present on this Physical Volume.
-u, --uuid
Generate new random UUID for specified physical volumes.
-x, --allocatable y|n
Enable or disable allocation of physical extents on this physical volume.
Example
"pvchange -x n /dev/sdk1" disallows the allocation of physical extents on this physical volume (possibly because of disk errors, or because
it will be removed after freeing it.
SEE ALSO
lvm(8), pvcreate(8)
Sistina Software UK LVM TOOLS 2.02.95(2) (2012-03-06) PVCHANGE(8)