On Wed, Apr 12, 2023 at 05:16:41PM +0800, Zhiyong Ye wrote: > configure mpath on sda alone on the current stock of machines. And I tested > this in my environment using lvchange --refresh, but it doesn't switch the > active LV to use mpatha. It seems to work for me with the latest version of lvm, which may be due to improved multipath component detection and/or improved handling of duplicate PVs. So the current upstream code might work for you also. # pvs PV VG Fmt Attr PSize PFree /dev/sdf ff lvm2 a-- <931.01g <930.76g # lvs -o+devices LV VG Attr LSize Origin Devices lvol1 ff -wi-ao---- 256.00m /dev/sdf(1) # mount | grep ff /dev/mapper/ff-lvol1 on /mnt type xfs (rw,relatime,seclabel,attr2,inode64,logbufs=8,logbsize=32k,noquota) # multipath -a /dev/sdf wwid '3690b11c0000438ad0000057150910423' added # multipath -l mpatha (3690b11c0000438ad0000057150910423) dm-4 DELL,MD32xxi size=931G features='2 pg_init_retries 50' hwhandler='1 rdac' wp=rw `-+- policy='service-time 0' prio=0 status=active `- 7:0:0:4 sdf 8:80 active undef running # pvs WARNING: Device mismatch detected for ff/lvol1 which is accessing /dev/sdf instead of /dev/mapper/mpatha. PV VG Fmt Attr PSize PFree /dev/mapper/mpatha ff lvm2 a-- <931.01g <930.76g # lvs ff WARNING: Device mismatch detected for ff/lvol1 which is accessing /dev/sdf instead of /dev/mapper/mpatha. LV VG Attr LSize lvol1 ff -wi-ao---- 256.00m # dmsetup table ff-lvol1 0 524288 linear 8:80 10240 # lvchange --refresh ff/lvol1 # dmsetup table ff-lvol1 0 524288 linear 253:4 10240 # pvs PV VG Fmt Attr PSize PFree /dev/mapper/mpatha ff lvm2 a-- <931.01g <930.76g # lvs -o+devices ff LV VG Attr LSize Devices lvol1 ff -wi-ao---- 256.00m /dev/mapper/mpatha(1) Dave _______________________________________________ linux-lvm mailing list linux-lvm@xxxxxxxxxx https://listman.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
