Hello, In my old setting, fstrim is supported: ext4 over LVM over MD software raid (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 change 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
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