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Special Forums Hardware Filesystems, Disks and Memory Linux Storage system: looking for advices Post 302384545 by pludi on Tuesday 5th of January 2010 04:44:33 PM
Old 01-05-2010
No, it's not possible with LVM alone. LVM is designed to simplify the management of multiple, different devices by grouping them together. Bonus is a slight speed improvement. If you loose one drive with LVM, the data on it is gone for good too, but it's easy to extend the size.

RAID, on the other hand, is designed not to simplify drive management, but to ensure data reliability. It's not trivial to manually represent multiple RAIDs as one storage, but if one device fails you'll have no data loss.
 
PVCK(8)                                                       System Manager's Manual                                                      PVCK(8)

NAME
pvck - check physical volume metadata SYNOPSIS
pvck [-d|--debug] [-h|--help] [-v|--verbose] [--labelsector] PhysicalVolume [PhysicalVolume...] DESCRIPTION
pvck checks physical volume LVM metadata for consistency. OPTIONS
See lvm for common options. --labelsector sector By default, 4 sectors of PhysicalVolume are scanned for an LVM label, starting at sector 0. This parameter allows you to specify a different starting sector for the scan and is useful for recovery situations. For example, suppose the partition table is corrupted or lost on /dev/sda, but you suspect there was an LVM partition at approximately 100 MB. This area of the disk may be scanned by using the --labelsector parameter with a value of 204800 (100 * 1024 * 1024 / 512 = 204800): pvck --labelsector 204800 /dev/sda Note that a script can be used with --labelsector to automate the process of finding LVM labels. SEE ALSO
lvm(8), pvcreate(8), pvscan(8) vgck(8) Sistina Software UK LVM TOOLS 2.02.95(2) (2012-03-06) PVCK(8)
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