🚀 go-pugleaf

In article <1992Sep08.142141.22673@rchland.ibm.com> tpg@rchland.vnet.ibm.com (Terry Gliedt) writes:
>Now when the NeXT boots, the system is doing some sort of reset to each of the
>SCSI devices. I presume this is some sort of low-level SCSI reset command. I'd
>like to have some means to reset the device to recover from this error state. I
>did not see anything in ioctl.h and in a few other includes. I'd appreciate some
>mail from anyone who can give me some leads (Jiro??).

On you're 2.x system, look in /usr/include/nextdev/scsireg.h.  (On 3.0
systems, who the %^*&$# know where they put it.  You can bet it's a
pretty long pathname, though.  But I digress...)  

You'll see that there is an ioctl operation (SGIOCRST) you can perform
on the raw SCSI device, /dev/sg0, which looks like it performs a SCSI
bus reset.  You'll need to be root to do this.  Also, this sure seems
like it has the great potential to hose up an I/O which might be
pending on other SCSI devices (like a SCSI disk).  Note that probably
performs a SCSI *BUS* reset and such a thing isn't specific to a
particular device on the bus.  You'll have to be real careful using
this..

louie