1.\" $OpenBSD: twe.4,v 1.17 2003/06/06 10:29:41 jmc Exp $ 2.\" 3.\" Copyright (c) 2000,2001 Michael Shalayeff. All rights reserved. 4.\" Public Domain. 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 pci 4 , 34.Xr scsi 4 , 35.Xr sd 4 36.Sh HISTORY 37The 38.Nm 39driver first appeared in 40.Ox 2.8 . 41.Sh AUTHORS 42The 43.Nm 44driver was written by 45.An Michael Shalayeff Aq mickey@openbsd.org , 46inspired by the 47.Fx 48driver by 49.An Mike Smith Aq msmith@freebsd.org . 50.Sh BUGS 51The card's BIOS seems to conflict with some other disk controllers 52which have their own BIOS, if such devices are configured earlier 53than this one. 54To avoid this situation, place 55.Nm 56cards in the lowest numbered slot before other SCSI or RAID disk controllers. 57.Pp 58The current 3ware firmware is known to fail if a redundant configuration 59is selected (RAID1 or RAID10) and the array is heavily used 60(e.g. installation) before the controller has finished initializing the array. 61In this case, create the array, boot the installation media and 62leave the array idle until all controller activity has ceased. 63.Pp 64None of the volumes management or monitoring functions, provided by the 65card's firmware, is supported due to the fact that information 66on these functions is not public. 67.Pp 68Only 3W-5400 was tested, but others should work. 69