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/sec
unused 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/sec
unused 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/sec
unused 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/sec
Raid6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
effelpist@
Jun@
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