On Tue, Mar 31, 2015 at 3:08 PM, Mark Knecht <markknecht@xxxxxxxxx> wrote: > On Tue, Mar 31, 2015 at 1:30 PM, Roman Mamedov <rm@xxxxxxxxxxx> wrote: >> On Tue, 31 Mar 2015 08:00:27 -0700 >> Mark Knecht <markknecht@xxxxxxxxx> wrote: >> >>> md3 : active raid6 sdc3[9] sdg3[5] sdf3[6] sde3[7] sdd3[8] >>> 1452264480 blocks super 1.2 level 6, 16k chunk, algorithm 2 [5/5] [UUUUU] >>> [====>................] resync = 22.8% (110608304/484088160) >>> finish=78.5min speed=79206K/sec >> >> Looks like you are running this without a write intent bitmap, why? It would >> at least save you from a full resync each time. >> >> -- >> With respect, >> Roman > > Honestly, I don't know. The machine was the first I ever built using > RAID for the system drive and I probably didn't find out about it, or > was just trying to keep it simple? Not at all sure. > > I'll check it out. > > Thanks, > Mark At this point, having put everything back together, I cannot find any specific clues about what caused the problem. Possibly the system might be showing its age. Maybe it's a corner condition in the 3.18 series kernel vs the 3.14 I was running before. No idea. The mdadm RAID seems to have done it's job wonderfully. At least at the Linux level there's no evidence at this time that anything was lost. Within my Windows VMs that were running on the mdadm RAID6 at the time of the Magic Sys Key reboot there seem to be minimal issues. One Windows program (Schwab's StreetSmart Edge) lost some of my trading environment configuration and I needed to recall only that file off the web server to get the platform configured correctly again. TradeStation was running in a second VM and showed no issues. Both trading platforms were live at the time of the lockup so I came out of this really well, and as I have good backups nothing would have been lost anyway. As per Roman's question/suggestion I've added the write intent bitmaps to all three RAIDs. Nominally only md3 is mounted most of the time anyway, but it's there to help if this problem continues. If anyone sees anything else in the data I posted yesterday let me know but everything mdadm specific seems good at this point. Cheers, Mark -- 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
