Hi! I'm using a LVM RAID5 on a machine but the write performance is pretty poor (about 20-30MB/s), where the read performance is quite good (about 280MB/s). I read about the stripe_cache_size for md raid and as far as I understand LVM raid, it uses md as well. In the design document for lvm2-raid (https://git.fedorahosted.org/cgit/lvm2.git/tree/doc/lvm2-raid.txt) I can find that a option --stripecache is specified there, but as it seems those options were never implemented. Is it possible to set the stripe cache size somewhere else? It seems to me that lvm2 uses dmsetup to create the raid, where a stripe cache can be set while creation. But it seems to me there is no interface to change such values later on? Thanks in advance! regards Sebastian
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