DOCUMENT ID:  1122-02

SYNOPSIS:     Changes to the Adaptec SCSI driver for Solaris x86

OS RELEASE:   

PRODUCT:      Solaris x86

KEYWORDS:     aha_docmd adapter idle error fast 154xcf SCSI disconnect


DESCRIPTION:

When installing the operating system onto the hard drive Solaris reports
the error: "aha_docmd: adapter won't go idle" and/or the installation
fails when used with hard-disks that conform to the "FAST SCSI" spec. 


SOLUTION:

Some FAST-SCSI hard disks that share the bus with the 154xB, 154xC and
154xCF have firmware problems.  The fix is a software workaround
available in a newly revised driver.  This fix also works on the 1540B,
which is not rated to work with FAST SCSI-2 drives, such as the
ST11200N, although Seagate for one, does not support its use with this
adapter. 

Workaround -

The workaround used to be to disable the disconnect/reconnect handshake
option on the Adaptec controller itself during installation of x86. 
This problem has since been fixed and is available as a patch. 

Get the latest driver update disks and install the revised 1540 (aha)
driver and DO NOT turn off the DISCONNECT option in the Adaptec setup
program during boot time.  To order the January maintenance release
diskette for x86 from our Order Operations Department at (415) 336-7459. 
The part number is ISOS-210-FP-JA4.  Or, if you prefer, the disk image
may also be downloaded off of CompuServe (GO SUNSOFT - Solaris x86
Library) or from the Internet.  To pull the image off the net, simply
ftp to ftp.uu.net as anonymous and the file name is "x-86-driver" in the
/vendor/sun/sun-doc subdirectory. 


DATE APPROVED: 10/10/95