linux-kernel - Re: Multi-Initiator SAS

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Date:	Tue, 19 Sep 2006 13:05:13 -0700
From:	"Darrick J. Wong" <djwong@...ibm.com>
To:	dougg@...que.net
CC:	linux-scsi@...r.kernel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: Multi-Initiator SAS

Douglas Gilbert wrote:

> With the mptsas driver you can use smp_utils to look
> at that expander via /dev/mptctl ('modprobe mptctl' first).
> To get an overview of what the expander sees, try:
>  # smp_discover -mb /dev/mptctl

Unfortunately, I see this:

root@...3a253:~# smp_discover -mb /dev/mptctl
MPTCOMMAND ioctl failed: No such device
ioctl failed
smp_send_req failed, res=-1

...a strace of the app reveals this:

stat("/dev/mptctl", {st_mode=S_IFCHR|0660, st_rdev=makedev(10, 220),
...}) = 0
open("/dev/mptctl", O_RDWR)             = 3
brk(0)                                  = 0x508000
brk(0x529000)                           = 0x529000
ioctl(3, 0xc0486d14, 0x508010)          = -1 ENODEV (No such device)

--D
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