[linux-lvm] Trim support on stripped volumes ?
Franck Routier (personnel)
alci at mecadu.org
Tue May 24 09:20:23 UTC 2011
I have set-up of server with 4 SSDs (OCZ Vertex 2) stripped using LVM.
Logical volume has been created using the -i 4 option (iostat confirms
that the 4 disks work in parallel when I write a file).
Ext4 fs is used on the volume, mounted with -discard option.
I am using kernel 2.6.38.
My question is : is there a chance that TRIM command makes its way to
the disks through LVM ? I've read contradictory informations on the web
and I'm sure this is the best place to ask.
My second question is : how would I make _sure_ it works ?
I've found a way to do it with hdparm --fibmap and hdparm --read-sector
But I don't think this can work with LVM. Would there be a similar way
to make sure it is working while using LVM ?
Thanks a lot,
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