1.\" $OpenBSD: twe.4,v 1.13 2001/08/05 22:32:34 brad Exp $ 2.\" 3.\" Copyright (c) 2000,2001 Michael Shalayeff. All rights reserved. 4.\" 5.\" 6.Dd September 15, 2000 7.Dt TWE 4 8.Os 9.Sh NAME 10.Nm twe 11.Nd 3ware Escalade RAID driver 12.Sh SYNOPSIS 13.Cd "twe* at pci? dev ? function ?" 14.Cd "scsibus* at twe?" 15.Sh DESCRIPTION 16The 17.Nm 18driver provides support for Escalade family of RAID controllers, 19including the 20.Tn 3W-5x00 and 21.Tn 3W-6x00 22models. 23.Pp 24These controllers support RAID 0, RAID 1, RAID 10 and JBOD 25configurations. 26All the RAID set volume management is done via the card BIOS. 27.Pp 28Even though the card uses IDE drives, this driver makes drives 29and/or RAID sets appear as 30.Xr sd 4 . 31.Sh SEE ALSO 32.Xr intro 4 , 33.Xr scsi 4 , 34.Xr sd 4 35.Sh AUTHORS 36The 37.Nm 38driver was written by 39.An Michael Shalayeff Aq mickey@openbsd.org , 40inspired by the 41.Fx 42driver by 43.An Mike Smith Aq msmith@freebsd.org . 44.Sh HISTORY 45The 46.Nm 47driver first appeared in 48.Ox 2.8 . 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 (RAID0 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