Thank you for answer. I know "media error" mean disk going to bad. I want to know why "slow initialize" did NOT complain bad block. Based on DELL document "slow initialize" will check bad block. --- 11/6/8 (三)，m.roth at 5-cent.us <m.roth at 5-cent.us> 寫道： > 寄件者: m.roth at 5-cent.us <m.roth at 5-cent.us> > 主旨: Re: [CentOS] what is difference between "slow initialize" and "patrol read" on RAID? > 收件者: "CentOS mailing list" <centos at centos.org> > 日期: 2011年6月8日,三,下午3:11 > mcclnx mcc wrote: > > We have DELL server with MD1000 Disk array in > it. O.S. is CENTOS 5.5. > > Recently every time MD1000 "patrol read" start I will > get "media error" > > messages on /var/log/message file. > > > > I use MD1000 "slow initialize" to initialize "bad > disk" and NO error. > > After "slow initialize" finish, I manually "startup > patrol read". I > > continue get "media error" on /var/log/message. > > > > Anyone know what difference between "slow initialize" > and "patrol read"? > > > No, but let me suggest to you that "media error" means just > that, a bad > drive. > > mark > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos >