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 1.7 2007/11/10 19:58:23 swildner Exp $
32 .Nd Adaptec AdvancedRAID Controller driver
34 .Cd options AAC_DEBUG=N
40 driver provides support for the Adaptec AAC family SATA, SCSI Ultra2
41 and Ultra160/320 RAID controllers.
42 These controllers support RAID 0, 1, 5, 10, and volume sets.
43 They have four channels in the add-in version
44 or 1-2 channels in the motherboard integrated version,
45 and are most often found relabeled by Dell or Hewlett-Packard.
46 Supported controllers include:
51 Adaptec SATA RAID 2410SA
53 Adaptec SATA RAID 2810SA
55 Adaptec SCSI RAID 2120S
57 Adaptec SCSI RAID 2200S
59 Adaptec SCSI RAID 5400S
76 Access to RAID containers is available via the
79 Individual drives cannot be accessed
80 unless they are part of a container or volume set,
81 and non-fixed disks cannot be accessed.
82 Containers can be configured by using
83 either the on-board BIOS utility of the card,
84 or a Linux-based management application.
88 device nodes provide access to the management interface of the controller.
89 One node exists per installed card.
94 exist for the Dell and HP flavors, respectively, and are required for
95 the CLI management utility available from these vendors to work.
99 defaults to 65536 and may be set at boot time to another value via
101 This value determines the maximum data transfer size allowed
103 Setting it higher will result in better performance,
104 especially for large sequential access patterns.
107 of the card limit this value to 64K for arrays with many members.
108 While it may be safe to raise this value, this is done
109 .Em at the operator's own risk .
111 performance peaks at a value of 96K,
112 and drops off dramatically at 128K,
113 due to other limitations of the card.
115 .Bl -tag -width /modules/aac.ko -compact
117 aac management interface
119 disk/container interface
120 .It Pa /modules/aac.ko
126 set to a number between 0 and 4
127 will enable increasingly verbose debug messages.
129 The adapter can send status and alert messages asynchronously
131 These messages are printed on the system console,
132 and are also queued for retrieval by a management application.
142 driver first appeared in
146 .Aq msmith@FreeBSD.org
148 .Aq scottl@FreeBSD.org
150 This driver is not compatible with controllers that have version 1.x firmware.
151 The firmware version is the same as the kernel version printed in the BIOS
152 POST and driver attach messages.
154 This driver will not work on systems with more than 4GB of memory.
156 The controller is not actually paused on suspend/resume.
158 Unloading driver is not supported at this time.