On Wed, Feb 03, 2010 at 07:54:05PM -0500, Bill McGonigle wrote: > Hi, all, > > I'm wondering what folks are doing for uniquely identifying plain disks > in their virtual machine configs. > > For instance, I'm trying out the new Xen version and stuck a couple SATA > drives in a box. I'd like to use them as physical devices, but not > break my vm config if I re-cable the drives (or move them to another > machine). > > I could create a degraded RAID mirror, and then reference them by mdX > and let md worry about the UUID's, but that's ugly. If I were using > luks on the drives they'd get tagged and could be referenced uniquely. > Same with iscsi, those are available uniquely under /sys. > > Maybe something with device mapper? But I'm actually interested in > benchmarking ZFS through Xen with this, so I'd hate to add another layer > just for this purpose, since it's only needed at setup time. I could > script some ugly hacks but I'd rather not. > > I was hoping to find a /sys/block/scsi/model/serialnumber type of thing > symlinked back to the ../../devices/pci... , but I didn't. So, I hope > I'm missing something obvious and folks here have this solved.
I suspect you are looking for /dev/disk/by-id whcih gives you a stable links based on model/serial number details $ ls -l /dev/disk/by-id/ total 0 lrwxrwxrwx. 1 root root 9 2010-02-03 18:04 ata-HTS721010G9SA00_MPCZ12Y0GNGWSE -> ../../sda lrwxrwxrwx. 1 root root 10 2010-02-03 18:04 ata-HTS721010G9SA00_MPCZ12Y0GNGWSE-part1 -> ../../sda1 lrwxrwxrwx. 1 root root 10 2010-02-03 18:04 ata-HTS721010G9SA00_MPCZ12Y0GNGWSE-part2 -> ../../sda2 lrwxrwxrwx. 1 root root 9 2010-02-03 18:04 scsi-SATA_HTS721010G9SA00_MPCZ12Y0GNGWSE -> ../../sda lrwxrwxrwx. 1 root root 10 2010-02-03 18:04 scsi-SATA_HTS721010G9SA00_MPCZ12Y0GNGWSE-part1 -> ../../sda1 lrwxrwxrwx. 1 root root 10 2010-02-03 18:04 scsi-SATA_HTS721010G9SA00_MPCZ12Y0GNGWSE-part2 -> ../../sda2 Daniel -- |: Red Hat, Engineering, London -o- http://people.redhat.com/berrange/ :| |: http://libvirt.org -o- http://virt-manager.org -o- http://ovirt.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: GnuPG: 7D3B9505 -o- F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 :| _______________________________________________ virt mailing list [email protected] https://admin.fedoraproject.org/mailman/listinfo/virt
