diff options
Diffstat (limited to 'share/man/man4/isp.4')
| -rw-r--r-- | share/man/man4/isp.4 | 42 |
1 files changed, 40 insertions, 2 deletions
diff --git a/share/man/man4/isp.4 b/share/man/man4/isp.4 index da6b776..f48dc80 100644 --- a/share/man/man4/isp.4 +++ b/share/man/man4/isp.4 @@ -26,7 +26,7 @@ .\" .\" $FreeBSD$ .\" -.Dd December 9, 2015 +.Dd December 20, 2016 .Dt ISP 4 .Os .Sh NAME @@ -39,13 +39,15 @@ kernel configuration file: .Bd -ragged -offset indent .Cd "device scbus" .Cd "device isp" +.Cd "device ispfw" .Ed .Pp Alternatively, to load the driver as a -module at boot time, place the following line in +module at boot time, place the following lines in .Xr loader.conf 5 : .Bd -literal -offset indent isp_load="YES" +ispfw_load="YES" .Ed .Sh DESCRIPTION This driver provides access to @@ -62,6 +64,30 @@ Fibre Channel supports initiator and target modes of FCP SCSI profile, utilizing Class 3 and Class 2 (2200 and later) connections. Support is available for Public and Private loops, Point-to-Point and Fabric connections. +.Pp +FC-Tape is supported on 4Gb (2400) and newer controllers. +FC-Tape is highly recommended for connections to tape drives that support +it. +It encompasses four elements from the the T-10 FCP-4 specification: +.Bl -bullet -offset indent +.It +Precise Delivery of Commands +.It +Confirmed Completion of FCP I/O Operations +.It +Retransmission of Unsuccessfully Transmitted IUs +.It +Task Retry Identification +.El +.Pp +Together these features allow for link level error recovery with tape +devices. +Without it, an initiator cannot, for instance, tell whether a tape write +command that has timed out resulted in all, part or none of the data going to +the tape drive. +FC-Tape is automatically enabled when connecting controller that supports +it to a target that supports it. +It may be disabled using configuration and hint options described below. .Sh FIRMWARE Firmware loading is supported if the .Xr ispfw 4 @@ -120,6 +146,13 @@ Target mode support for Fibre Channel adapters may be enabled with the .Cd options ISP_TARGET_MODE .Pp option. +.Pp +To disable FC-Tape, use the following configuration option: +.Pp +.Cd options ISP_FCTAPE_OFF +.Pp +Note that even if the ISP_FCTAPE_OFF option is used, it may be overridden +by the fctape hint described below. .Sh BOOT OPTIONS The following options are switchable by setting values in .Pa /boot/device.hints . @@ -169,6 +202,11 @@ A hint value for a driver debug level (see the file for the values. .It Va hint.isp.0.vports A hint to create specified number of additional virtual ports. +.It Va hint.isp.0.nofctape +Set this to 1 to disable FC-Tape operation on the given isp instance. +.It Va hint.isp.0.fctape +Set this to 1 to enable FC-Tape operation on the given isp instance for +targets that support it. .El .Sh SYSCTL OPTIONS .Bl -tag -width indent |
