Hi, I'm trying to resize a multipath map (an EMC Clariion LUN) but something goes wrong with ioctl call. After resizing LUN by EMC Navisphere, I rescanned four paths using: echo "1" > /sys/bus/scsi/drivers/sd/<h>\:<b>\:<t>\:<l>/block/device/rescan ... I noticed (in /var/log/messages) that kernel "sees" new size only for two paths, surely the active ones (Clariion is an active/passive array). Then, I trespassed LUN on the other storage processor and rescanned all paths a second time: all sizes was updated. But, re-running 'multipath -v2', I got: # multipath -v 2 device-mapper: reload ioctl failed: Invalid argument I found no other way to make this work but umounting filesystem, deactivating LVM and ran 'multipath -f ... && multipath -v2' (and then other regular LVM stuffs). OS is Red Hat 4.5. About this, I found this message in archives: http://www.redhat.com/archives/dm-devel/2007-August/msg00188.html Is it confirmed that online resizing with multipath is impossible? If yes, in my opinion, this is a serious limitation to a serious enterprise use of Linux. Thanks in advance for any help -- Domenico Viggiani -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
