/dev/sg0

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1 total messages Started by Felix A. Lugo Wed, 15 Apr 1992 20:32

#708

Author: Felix A. Lugo
Date: Wed, 15 Apr 1992 20:32

30 lines
1445 bytes

Hi,
	I'm using /dev/sg0 to request a SCSI inquiry of all available
	devices on the bus.  Here's the algorithm I'm using:

		- open /dev/sg0 for read/write
		- LOOP (loop:= 0 ; loop < 8; loop:=loop+1)
			- set lun:=0 and target:=loop  --  ioctl (SGIOCSTL)
			- send inquiry command -- ioctl (SGIOCREQ)
			- print results
		- close /dev/sg0

	The above procedure works properly, but every now and then, it fails
	to detect ALL SCSI devices!

	BTW, I've checked the SG(4) man page, and some SCSI examples from
	the net.  They all display the same behavior!

	What's going on?  Is it a NeXT problem, or am I missing something
	in the above algorithm?

---

===========================================================================
Felix A. Lugo

E-Mail: (NeXTmail preferred)			Felix_A_Lugo@ATT.COM
						coco@ihcoco.att.com
     AT&T NeXT User Group			nug@ihcoco.att.com
     HOME NeXTcube				home@ihcoco.att.com
===========================================================================

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