Hello, Sorry if it is a cross posting. I had post my question in linux-lvm mailing list but did not have reply. In my old setting, fstrim is supported: ext4 over LVM over MD software raid 1 (mdadm) > SSD. After reading the recommendation in RHEL 6 https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Storage_Administration_Guide/ch-ssd.html I changed to use raid 1 mirror using 'LVM RAID logical volume'. It make use of MD raid internally. But I found fstrim does not work anymore. Is the behavior expected? Thanks and regards, Patrick -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
