Produces identical UUID's

[Shahar Or]

Devices created using flashcache_create have the same UUID's as their backed devices. Is this legal?
/dev/mapper/hdd-home: LABEL="home" UUID="57b91916-8540-49eb-945a-f9cc2e48c16a" TYPE="ext4"
/dev/mapper/homecache: LABEL="home" UUID="57b91916-8540-49eb-945a-f9cc2e48c16a" TYPE="ext4"

Thanks,
Shahar

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: flashcache-dkms 1.0+git20121114-1
ProcVersionSignature: Ubuntu 3.8.0-9.18-generic 3.8.1
Uname: Linux 3.8.0-9-generic x86_64
ApportVersion: 2.9-0ubuntu2
Architecture: amd64
Date: Sun Mar 3 17:29:30 2013
EcryptfsInUse: Yes
InstallationDate: Installed on 2010-10-12 (873 days ago)
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
MarkForUpload: True
PackageArchitecture: all
SourcePackage: flashcache
UpgradeStatus: Upgraded to raring on 2012-11-07 (115 days ago)