WD20EARS-00MVWB0 低速病発症の瞬間
WESTERN DIGITAL WD20EARS-00MVWB0 (2TB/SATA) [バルク品] 新品 税込WD20EARS-00MVWB0のいわゆる「低速病」が発生する瞬間をとらえました。 Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]md6 : active raid6 sdd3[3] sdc3[2] sda3[0] sde3[4] sdb3[1] sdf3[5] 7764888832 blocks level 6, 64k chunk, algorithm 2 [6/6] [UUUUUU] [==================>..] resync = 93.6% (1818411264/1941222208) finish=71.2min speed =28706K/secunused devices: <none>Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]md6 : active raid6 sdd3[3] sdc3[2] sda3[0] sde3[4] sdb3[1] sdf3[5] 7764888832 blocks level 6, 64k chunk, algorithm 2 [6/6] [UUUUUU] [==================>..] resync = 93.7% (1819156420/1941222208) finish=79.3min speed =25634K/secunused devices: <none>Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]md6 : active raid6 sdd3[3] sdc3[2] sda3[0] sde3[4] sdb3[1] sdf3[5] 7764888832 blocks level 6, 64k chunk, algorithm 2 [6/6] [UUUUUU] [==================>..] resync = 93.7% (1819349632/1941222208) finish=290.0min speed=7003K/secunused devices: <none>Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]md6 : active raid6 sdd3[3] sdc3[2] sda3[0] sde3[4] sdb3[1] sdf3[5] 7764888832 blocks level 6, 64k chunk, algorithm 2 [6/6] [UUUUUU] [==================>..] resync = 93.7% (1819534680/1941222208) finish=320.8min spee=6320K/secRaid6の同期をとっているところですが、/proc/mdstatを30秒毎に表示させたところ、急激に速度が落ちる場合があるのが確認できました。3番目のところで、(同期の)残り時間がはねあがり、スピードが極端に落ちるのがわかると思います。 ウワサはやはり本当でした。 6台もつかっていると、確率6倍ということですかね。 orz