I have been trying to figure out whether I can enable write caching on my PATA hard drives (WD3200JB) and have fsync not return until data is safely on the platters. I am also running software raid. This is currently on FC5 (though soon to be FC6) with a 2.6.18 kernel. >From snippets I have found on the net, it looks like write barriers are pushed down through software raid when using raid 1. So that if I mount the file systems with data=ordered and barrier=1, I think I should be OK, but I was hoping to get a more definitive answer. It also looks like barrier=1 is or will be the default for ext3. Is there a way I can check if this is the case on my system? /proc/mounts doesn't show the barrier option when I use barrier=1 or don't specify it at all. mount -lv shows the barrier option (when it was used for mounting), but not the data option. I am not sure if either of these are using the same data that the ext3 driver is using. _______________________________________________ Ext3-users mailing list Ext3-users@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/ext3-users
