RAID5でCentOSを構築する際の ERROR: sil: RAID type 253 not supported.
ERROR: adding /dev/sda to RAID set "sil_bgagagdedice"
#dmraid -r /dev/sda: sil, "sil_bgagagdedice", unknown, ok, 976771630 sectors, data@ 0 /dev/sdb: sil, "sil_bgagagdedice", unknown, ok, 976771630 sectors, data@ 0 /dev/sdc: sil, "sil_bgagagdedice", unknown, ok, 976771630 sectors, data@ 0 /dev/sdd: sil, "sil_bgagagdedice", unknown, ok, 976771630 sectors, data@ 0
解決を一時断念。