On Mon, Nov 11, 2013 at 7:39 PM, Brad Campbell <lists2009@xxxxxxxxxxxxxxx> wrote: > On 11/07/2013 06:54 PM, Justin Piszcz wrote: >> >> On Mon, Nov 4, 2013 at 5:25 AM, Justin Piszcz <jpiszcz@xxxxxxxxxxxxxxx> >> wrote: >>> >>> Hi, >>> >>> I run two SSDs in a RAID-1 configuration and I have a swap partition on a >>> third SSD. Over time, the mismatch_cnt between the two devices grows >>> higher >>> and higher. >>> > > Are both SSD's identical? Do you have discard enabled on the filesystem? Yes (2 x Intel SSDSC2CW240A3) & yes )/dev/root on / type ext4 (rw,relatime,discard,data=ordered)) > > The reason I ask is I have a RAID10 comprised of 3 Intel and 3 Samsung > SSD's. The Intel return 0 after TRIM while the Samsung don't, so I _always_ > have a massive mismatch_cnt after I run fstrim. I never use a repair > operation as it's just going to re-write the already trimmed sectors. Very interesting and good to know! Justin. -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
