[SunRescue] Is this CD-ROM supported?

[scohen - Stephen Cohen]

Cross-posted on Sun Rescue and SPARC Linux mail groups.

Although this external CDROM was successfully used to load Linux 6.0 onto my SPARCstation IPX, the system appears to be unable to mount a ufs to the CDROM when trying to reload Solaris.

probe-scsi reveals: 
Target 6, unit 0, MEDIAVISRENO CD-ROMX2A 1.10

The specific boot messages are:
Boot device: /sbus/esp at 0,800000/sd at 6,0:c
(twirling bar)
SunOS Release 5.5.1 Version Generic [UNIX(R) System V Release 4.0]
Copyright (c) 1983-1996, 
(twirling bar again)
WARMING: /sbus at 1,f8000000/esp at 0,800000 (esp0)
         data transfer overrun: current esp state:
esp:             State=DATA Last State=DATA_DONE
esp:             Latched stat=0x11<XZERO,()> intr=0x10<BUS> fifo 0x80
esp:             last msg out: IDENTIFY; last msg in: COMMAND COMPLETE
esp:             DMA csr=0x94400010<INTEN>
esp:             addr=fff01318 dmacnt=0 lst=fff01118 last_cnt=200
esp:             Cmd dump for Target 6 Lun 0:
esp:             cdblen=6, cdb=[ 0x8 0x0 0x0 0x0 0x1 0x0 ]
esp:             pkt_state=0xf<XFER,CMD,SEL,ARB> pkt_flags=0x802 pkt_statistics=0x0
esp:             cmd_flage=0x1422 cmd_timeout=60
WARNING: /sbus at 1,f8000000/esp at 0,800000 (esp0):
         Reverting to slow SCSI cable mode
Cannot mount root on /sbus at 1,f8000000/esp at 0,800000/sd at 6,0:b fstype ufs
panic: vfs_mountroot: cannot mount root
rebooting...

This sequence of events occurs for both Solaris 2.5.1 and 2.6 CDs.  Again, everything works fine when loading Red Hat Linux 6.0 for SPARC.  

I find it interesting that the message reads "reverting to slow SCSI cable mode."  It is an external CD-ROM on a 50 pin cable.  From the IPX system unit, the cable goes directly to the CD-ROM.  Then, a second cable connects the CD-ROM to an external box containing a second drive and a tape unit.  This cable is 50 pin on the CD-ROM side but has a huge number of pins on the external box side.

Any ideas?  Does it make a difference (to Solaris) into which scsi port on the CD-ROM the first cable plugs?

Regards,

Stephen P. Cohen           Email:  scohen at acxiom.com
Acxiom Data Network        Phone:  (501)336-2054
Logistics Business Unit    Fax:    (501)336-3910

Acxiom Corporation         Web:     http://www.acxiom.com
301 Industrial Boulevard
Conway, AR   72033