> I replaced an Intel P4 D845PESV motherboard
> with an Intel P4 D865PERL motherboard -- as a
> result of lightning that ended up going through
> a working APC Smart-UPS 700 and knocking out the
> I had SCO OSR504 installed in that machine on an
> Adaptec 29160 with 2 Seagate LVDs, which were
> NOT affected by the hit.
> /dev/boot is on hd0a and
> /dev/root is on /dev/hd24. (Another HD off the 50-pin
> port on the 29160 had been installed BEFORE the 2nd
> LVD drive - so that's why OSR504 root is on /dev/hd24.)
> I am using the ad160 driver that is for
> OSR505 since there was none for OSR504 and it worked on OSR504. The system
> was bootable both
> from floppies and the hard disk with the Intel P4
> D845PESV motherboard before the hit.
> Solaris 9 is installed on the same hd as OSR504 root
> and boots just fine with the new motherboard.
> Microsoft Small Business Server is also on the 1st hd and
> it also boots just fine.
> Now, I cannot boot OSR504 from hd(40)unix nor from
> fd(60)unix. I have tried 2 SCO OSR504 boot/root
> floppies and here are the results:
> When booting with fd(60)unix, boot consistently STOPS
> at the 1st dot after the line:
> Loading kernel fd(60)unix.Z .text
> . [stops here]
> If I boot from the floppy but use the following bootstring
> hd(40)unix swap=hd(161) dump=hd(161) root=hd(162),
> then boot stops with 1 complete line of dots and about
> half-way through the next line of dots after the following
> Loading kernel hd(40)unix.Z .text
> If I boot from the hard disk, boot consistently stops after
> 4 complete lines of dots plus half of the 5th line.
> If I try to BOOT ONLY from an SCO OSR505 boot
> floppy withOUT the ad160 driver and with an OSR505
> kernel from a Pentium 100 PC, the boot completes to
> the root filesystem diskette request. I do NOT go any
> further since the controller driver is NOT ad160 on the
> OSR505 system and it isn't the same OS version.
> If I disable cache in the bootstring, boot still stops
> after the "Loading... .text" msg.
> When I remove the Adaptec 29160 and the 2 LVD
> drives and hook to a new Dell P4 Dimension 8250,
> I have no problem booting/rooting from the hard drives.
> The D865PERL motherboard is running with:
> DDR333 -> single channel dynamic paging mode
> Memory is 512 Mb (DDR400) single channel (setup)
> Two serial-ATA ports are also available on this
> motherboard, but not being used.
> If I try to change the ATA/IDE config to legacy mode --
> up to 2 IDE devices max, booting from the hd stops
> sooner after the "Loading... .text" line.
> Under chipset configuration, the following is set on the
> Intel motherboard:
> ISA Enable Bit - Enable
> PCI Latency Timer 32
> Extended config:
> SDRAM Frequency Auto
> CPC Override Auto
> SDRAM Timing Control AUTO
> SDRAM RAS Act. to Pre. 7
> SDRAM CAS# LATENCY 2.5
> SDRAM RAS# to CAS# delay 3
> SDRAM RAS# Precharge 3
> On the OSR504 system, I have many patches and
> rs504c: oss470a,oss485a,oss471f and
> If there is anything I can do to change the kernel (while
> the disks are hooked to the Dell machine) or a bootstring
> option to boot the SCO OSR504 on the new motherboard, please let me know.
> I would prefer to work on the P4 rather than the Pentium
> I understand that I need to upgrade to OSR507 and
> maybe that would solve my problem, but I need an
> interim solution if possible.