Phil, >> Device Model: ST2000DM001-9YN164 > > If I recall correctly, this model doesn't support error recovery > control. If you haven't fixed your driver timeouts, it explains your > situation. I had been believing that nowadays all hdd drive can reallocate bad sectors. It is wrong, right? I had not fixed driver timeouts. It's a new word to me. I wonder these settings are required to use rest Seagate drives (sdd and sde). I'll use RAID-capable drives when exchanging kicked out disks. Thank you for your advice. I'm learnning a lot through my problem and really thank to linux-raid community, people helped me, and of course software RAID system. ;-) Thanks Yuji ----- CONFIDENTIAL: This e-mail may contain information that is confidential or otherwise protected from disclosure and intended only for the party to whom it is addressed. If you are not the intended recipient, please notify the sender by return and delete this e-mail. You are hereby formally advised that any unauthorized use, disclosure or copying of this email is strictly prohibited and may be unlawful. ��.n��������+%������w��{.n�����{����w��ܨ}���Ơz�j:+v�����w����ޙ��&�)ߡ�a����z�ޗ���ݢj��w�f