1.\" $OpenBSD: twe.4,v 1.18 2004/02/10 15:10:49 mickey Exp $ 2.\" 3.\" Michael Shalayeff, 2000. Public Domain. 4.\" 5.Dd September 15, 2000 6.Dt TWE 4 7.Os 8.Sh NAME 9.Nm twe 10.Nd 3ware Escalade RAID driver 11.Sh SYNOPSIS 12.Cd "twe* at pci? dev ? function ?" 13.Cd "scsibus* at twe?" 14.Sh DESCRIPTION 15The 16.Nm 17driver provides support for Escalade family of RAID controllers, 18including the 19.Tn 3W-5x00 and 20.Tn 3W-6x00 21models. 22.Pp 23These controllers support RAID 0, RAID 1, RAID 10 and JBOD 24configurations. 25All the RAID set volume management is done via the card BIOS. 26.Pp 27Even though the card uses IDE drives, this driver makes drives 28and/or RAID sets appear as 29.Xr sd 4 . 30.Sh SEE ALSO 31.Xr intro 4 , 32.Xr pci 4 , 33.Xr scsi 4 , 34.Xr sd 4 35.Sh HISTORY 36The 37.Nm 38driver first appeared in 39.Ox 2.8 . 40.Sh AUTHORS 41The 42.Nm 43driver was written by 44.An Michael Shalayeff Aq mickey@openbsd.org , 45inspired by the 46.Fx 47driver by 48.An Mike Smith Aq msmith@freebsd.org . 49.Sh BUGS 50The card's BIOS seems to conflict with some other disk controllers 51which have their own BIOS, if such devices are configured earlier 52than this one. 53To avoid this situation, place 54.Nm 55cards in the lowest numbered slot before other SCSI or RAID disk controllers. 56.Pp 57The current 3ware firmware is known to fail if a redundant configuration 58is selected (RAID1 or RAID10) and the array is heavily used 59(e.g. installation) before the controller has finished initializing the array. 60In this case, create the array, boot the installation media and 61leave the array idle until all controller activity has ceased. 62.Pp 63None of the volumes management or monitoring functions, provided by the 64card's firmware, is supported due to the fact that information 65on these functions is not public. 66.Pp 67Only 3W-5400 was tested, but others should work. 68