После создания рейда и установки системы CentOS 5.1 mdadm говорит "все нормально", а именно: Raid Level : raid1 Array Size : 485235200 (462.76 GiB 496.88 GB) Device Size : 485235200 (462.76 GiB 496.88 GB) Raid Devices : 2 Total Devices : 2 Preferred Minor : 0 Persistence : Superblock is persistent Update Time : Sat Jan 6 00:30:44 2001 State : clean ^^^^^//на все девайсы. Их 3. Active Devices : 2 Working Devices : 2 Failed Devices : 0 Spare Devices : 0 UUID : cc5fa06e:9cc9de28:a4b1a385:1ceb6341 Events : 0.4 Number Major Minor RaidDevice State 0 3 3 0 active sync /dev/hda3 1 22 3 1 active sync /dev/hdc3 А вот dmesg не много позже этого: md: Autodetecting RAID arrays. md: autorun ... md: considering hdc3 ... md: adding hdc3 ... md: hdc2 has different UUID to hdc3 md: hdc1 has different UUID to hdc3 md: adding hda3 ... md: hda2 has different UUID to hdc3 md: hda1 has different UUID to hdc3 md: created md0 md: bind<hda3> md: bind<hdc3> md: running: <hdc3><hda3> raid1: raid set md0 active with 2 out of 2 mirrors //тоже на 3 девайса hdc: status timeout: status=0xd0 { Busy } ide: failed opcode was: unknown hdc: no DRQ after issuing MULTWRITE_EXT hda: status timeout: status=0xd0 { Busy } ide: failed opcode was: unknown hda: no DRQ after issuing MULTWRITE_EXT ide1: reset: success ide0: reset: success hda: status timeout: status=0xd0 { Busy } ide: failed opcode was: unknown hda: no DRQ after issuing MULTWRITE_EXT ide0: reset: success hdc: status timeout: status=0xd0 { Busy } ide: failed opcode was: unknown hdc: no DRQ after issuing MULTWRITE_EXT hda: status timeout: status=0xd0 { Busy } ide: failed opcode was: unknown hda: no DRQ after issuing MULTWRITE_EXT ide0: reset: success ide1: reset: success hda: status timeout: status=0xd0 { Busy } ide: failed opcode was: unknown hda: no DRQ after issuing MULTWRITE_EXT ide0: reset: success