Re: LVM on dmraid breakage
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On Wed, Aug 01, 2007 at 04:19:59PM -0400, Phillip Susi wrote:
I am investigating a bug report involving the combination of lvm and dmraid, and it seems to me that the problem is that lvm is detecting the underlying partition on the primary disk and accessing it directly rather than going through the raid device made by dmraid. I think that the problem is there is no facility for dmraid to "claim" the physical disk so that lvm does not look at it, and also to have lvm scan the raid device for physical volumes.Does anyone have any thoughts on how this might be accomplished?
Two things come to mind 1) dmraid should use ioctl BLKPG_DEL_PARTITION, to clean up any eventual partition table on component devices 2) lvm tool filter could be modified to check if a device has been already claimed by device-mapper. something along the lines of: ioctl DM_LIST_DEVICES while (...) ioctl DM_TABLE_DEPS the above would probably require a cache. i believe that manual use of partx or lvm filters is sub-optimal L. -- Luca Berra -- bluca@xxxxxxxxxx Communication Media & Services S.r.l. /"\ \ / ASCII RIBBON CAMPAIGN X AGAINST HTML MAIL / \ _______________________________________________ Ataraid-list mailing list Ataraid-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/ataraid-list