[CentOS] rescheduling sector linux raid ?

Hi List,

What this means?

md: syncing RAID array md0
md: minimum _guaranteed_ reconstruction speed: 1000 KB/sec/disc.
md: using maximum available idle IO bandwidth (but not more than
200000 KB/sec) for reconstruction.
md: using 128k window, over a total of 2096384 blocks.
md: md0: sync done.
RAID1 conf printout:
 --- wd:2 rd:2
 disk 0, wo:0, o:1, dev:sda2
 disk 1, wo:0, o:1, dev:sdb2
sd 0:0:0:0: SCSI error: return code = 0x06000000
end_request: I/O error, dev sda, sector 451792231
raid1: sda1: rescheduling sector 451792168
sd 0:0:0:0: SCSI error: return code = 0x06000000
end_request: I/O error, dev sda, sector 451792263
raid1: sda1: rescheduling sector 451792200
raid1: sdb1: redirecting sector 451792168 to another mirror
raid1: sdb1: redirecting sector 451792200 to another mirror
md: syncing RAID array md0
md: minimum _guaranteed_ reconstruction speed: 1000 KB/sec/disc.
md: using maximum available idle IO bandwidth (but not more than
200000 KB/sec) for reconstruction.
md: using 128k window, over a total of 2096384 blocks.
md: md0: sync done.
RAID1 conf printout:
 --- wd:2 rd:2
 disk 0, wo:0, o:1, dev:sda2
 disk 1, wo:0, o:1, dev:sdb2

note lines:

sd 0:0:0:0: SCSI error: return code = 0x06000000
end_request: I/O error, dev sda, sector 451792263
raid1: sda1: rescheduling sector 451792200
raid1: sdb1: redirecting sector 451792168 to another mirror
raid1: sdb1: redirecting sector 451792200 to another mirror

Is one disk going down? cat /proc/mdstat still shows software raid
array as working one.

--
Eero