On Thu, Nov 04, 2010 at 09:19:43AM -0400, Jeff Layton wrote: > Do many of the SATA controllers support TRIM? (i.e. pass > the TRIM command to the SSD). Does anyone know > anything about dm/md supporting TRIM? (I'm thinking LVM > and software RAID tools). As far as I know, there's nothing to be done in any SATA controller driver to support TRIM. It's just up to the drive whether it understands the command. Not sure what the sate of play is with MD/DM and TRIM. It's a bit tricky because some SATA drives will return different garbage from TRIMmed sectors each time they're read. That can hamper a RAID-5/6 rebuild "somewhat". -- Matthew Wilcox Intel Open Source Technology Centre "Bill, look, we understand that you're interested in selling us this operating system, but compare it to ours. We can't possibly take such a retrograde step." -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
