1 .\" Copyright (c) 2000 Scott Long
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25 .\" $FreeBSD: src/share/man/man4/aac.4,v 1.3.2.8 2001/09/27 22:01:38 scottl Exp $
26 .\" $DragonFly: src/share/man/man4/aac.4,v 1.3 2004/12/20 14:21:19 swildner Exp $
32 .Nd Adaptec AdvancedRAID Controller driver
34 .Cd options AAC_COMPAT_LINUX
35 .Cd options AAC_DEBUG=N
41 driver provides support for the Adaptec AAC family SCSI Ultra2 and Ultra160
43 These controllers support RAID 0, 1, 5, 10, and volume sets.
44 They have four channels in the add-in version
45 or 1-2 channels in the motherboard integrated version,
46 and are most often found relabeled by Dell or Hewlett-Packard.
47 Supported controllers include:
52 Adaptec SCSI RAID 5400S
65 Access to RAID containers is available via the
68 Individual drives cannot be accessed
69 unless they are part of a container or volume set,
70 and non-fixed disks cannot be accessed.
71 Containers can be configured by using
72 either the on-board BIOS utility of the card,
73 or a Linux-based management application.
77 device nodes provide access to the management interface of the controller.
78 One node exists per installed card.
83 exist for the Dell and HP flavors, respectively, and are required for
84 the CLI management utility available from these vendors to work.
85 Compiling the driver with the
87 option enables the Linux-compatible
89 interface for the management device.
93 defaults to 65536 and may be set at boot time to another value via
95 This value determines the maximum data transfer size allowed
97 Setting it higher will result in better performance,
98 especially for large sequential access patterns.
101 of the card limit this value to 64K for arrays with many members.
102 While it may be safe to raise this value, this is done
103 .Em at the operator's own risk .
105 performance peaks at a value of 96K,
106 and drops off dramatically at 128K,
107 due to other limitations of the card.
109 .Bl -tag -width /modules/aac.ko -compact
111 aac management interface
113 disk/container interface
114 .It Pa /modules/aac.ko
120 set to a number between 0 and 3
121 will enable increasingly verbose debug messages.
123 The adapter can send status and alert messages asynchronously
125 These messages are printed on the system console,
126 and are also queued for retrieval by a management application.
136 driver first appeared in
140 .Aq msmith@FreeBSD.org
142 .Aq scottl@FreeBSD.org
144 This driver is not compatible with controllers that have version 1.x firmware.
145 The firmware version is the same as the kernel version printed in the BIOS
146 POST and driver attach messages.
148 This driver will not work on systems with more than 4GB of memory.
150 The controller is not actually paused on suspend/resume.
152 Unloading driver is not supported at this time.