Hi. I'm trying to resize multipath maps, but there appears to be something wrong with the ioctl call... I resized the "www" volume on the storage array from 25GB to 45GB, and attempted to reload it on the host, which is running 2.6.23-rc3 and multipath-tools 0.4.7. It resulted in the following: root@atalanta:~# multipath -ll [...] www (3600a0b80002984ae0000179b46a687fb) [size=25 GB][features=1 queue_if_no_path][hwhandler=1 rdac] \_ round-robin 0 [prio=6][active] \_ 3:0:1:0 sdf 8:80 [active][ready] \_ 4:0:1:0 sdi 8:128 [active][ready] \_ round-robin 0 [prio=0][enabled] \_ 4:0:0:0 sdc 8:32 [active][ready] \_ 3:0:0:0 sdd 8:48 [active][ready] root@atalanta:~# for d in sdf sdi sdc sdd; do cat /sys/block/$d/size; done 52428800 52428800 52428800 52428800 root@atalanta:~# for d in sdf sdi sdc sdd; do echo 1 > /sys/block/$d/device/rescan; done root@atalanta:~# for d in sdf sdi sdc sdd; do cat /sys/block/$d/size; done 94371840 94371840 94371840 94371840 root@atalanta:~# multipath -v 2 -d reload: www (3600a0b80002984ae0000179b46a687fb) [size=45 GB][features=0][hwhandler=1 rdac] \_ round-robin 0 [prio=0][undef] \_ 4:0:0:0 sdc 8:32 [active][ready] \_ 3:0:0:0 sdd 8:48 [active][ready] \_ round-robin 0 [prio=6][undef] \_ 3:0:1:0 sdf 8:80 [active][ready] \_ 4:0:1:0 sdi 8:128 [active][ready] [...] root@atalanta:~# multipath -v 2 device-mapper: reload ioctl failed: Invalid argument device-mapper: reload ioctl failed: Invalid argument device-mapper: reload ioctl failed: Invalid argument device-mapper: reload ioctl failed: Invalid argument root@atalanta:~# dmsetup table www | sed 's/52428800/94371840/' | dmsetup reload www device-mapper: reload ioctl failed: Invalid argument Command failed Ultimately I found no other way to make this work but to umount the file system, then run "multipath -f www; multipath", which kind of defeated the point of fancy online resizing support in the file system and storage array since I need downtime to do it. Is there any other way to make online resizing work? By the way, I think the error is happening in the kernel, due to the following messages appearing in dmesg after the rescan and multipath steps: sd 3:0:1:0: [sdf] 94371840 512-byte hardware sectors (48318 MB) sd 3:0:1:0: [sdf] Write Protect is off sd 3:0:1:0: [sdf] Mode Sense: 77 00 10 08 sd 3:0:1:0: [sdf] Write cache: enabled, read cache: enabled, supports DPO and FUA sd 4:0:1:0: [sdi] 94371840 512-byte hardware sectors (48318 MB) sd 4:0:1:0: [sdi] Write Protect is off sd 4:0:1:0: [sdi] Mode Sense: 77 00 10 08 sd 4:0:1:0: [sdi] Write cache: enabled, read cache: enabled, supports DPO and FUA sd 4:0:0:0: [sdc] 94371840 512-byte hardware sectors (48318 MB) sd 4:0:0:0: [sdc] Write Protect is off sd 4:0:0:0: [sdc] Mode Sense: 77 00 10 08 sd 4:0:0:0: [sdc] Uses READ/WRITE(6), disabling FUA sd 4:0:0:0: [sdc] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA sd 3:0:0:0: [sdd] 94371840 512-byte hardware sectors (48318 MB) sd 3:0:0:0: [sdd] Write Protect is off sd 3:0:0:0: [sdd] Mode Sense: 77 00 10 08 sd 3:0:0:0: [sdd] Uses READ/WRITE(6), disabling FUA sd 3:0:0:0: [sdd] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA device-mapper: multipath rdac: using RDAC command with timeout 6000 device-mapper: table: device 8:32 too small for target device-mapper: table: 253:3: multipath: error getting device device-mapper: ioctl: error adding target to table device-mapper: multipath rdac: using RDAC command with timeout 6000 device-mapper: table: device 8:32 too small for target device-mapper: table: 253:3: multipath: error getting device device-mapper: ioctl: error adding target to table device-mapper: multipath rdac: using RDAC command with timeout 6000 device-mapper: table: device 8:32 too small for target device-mapper: table: 253:3: multipath: error getting device device-mapper: ioctl: error adding target to table device-mapper: multipath rdac: using RDAC command with timeout 6000 device-mapper: table: device 8:32 too small for target device-mapper: table: 253:3: multipath: error getting device device-mapper: ioctl: error adding target to table Regards -- Tore Anderson -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
