October 31, 201312 yr Running 5.0 release. When I start a parity check, I get normal speeds 70-90MB/s . However, after an hour or two at 15% (3TB check), the speed abruptly drops off to insignificant # 375kB/s . CPU is pretty much idle, unraidd and mdrecoveryd at 0% usage. Syslog starts off normal: Oct 31 08:55:25 Tower kernel: md: recovery thread woken up ... Oct 31 08:55:25 Tower kernel: md: recovery thread checking parity... Oct 31 08:55:25 Tower kernel: md: using 1536k window, over a total of 2930266532 blocks. Oct 31 10:17:05 Tower kernel: md: correcting parity, sector=852142080 ... Oct 31 10:17:05 Tower kernel: md: correcting parity, sector=852142864 Oct 31 10:17:05 Tower kernel: md: correcting parity, sector=852142872 Oct 31 10:17:05 Tower kernel: md: correcting parity, stopped logging I suspect that when it start correcting parity the speed drop off occurs. System info: System: Supermicro - X9SCL/X9SCM CPU: Intel® Xeon® CPU E3-1275 V2 @ 3.50GHz - 3.5 GHz Cache: 256 kB, 1024 kB, 8192 kB Memory: 16392 MB (max. 32 GB) Network: bond0: adaptive load balancing eth0: 1000Mb/s - Full Duplex eth1: 1000Mb/s - Full Duplex Connections: Zero Uptime:53 days, 23:30:58 SAS HBA is IBM-M1015 (in LSI9211-IR mode) w/ Chenbro expander Any help or pointers appreciated.
October 31, 201312 yr Author Smart report attached. /dev/sds is parity. nothing out of the ordinary afaik. smart.txt
November 1, 201312 yr Author Nothing in either syslog or dmesg kernel ring buffer syslog.zip dmesg.txt
November 1, 201312 yr Has the system worked previously? Check for MB BOIS and SATA card firmware updates. Run memtest overnight.
November 2, 201312 yr Author Do you have anything else? because this is all very basic stuff that I've already gone over.
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