So here is further odd behavior. At this point I am just going to dig in and keep plugging away here.
I fetched from : https://cdimage.debian.org/cdimage/ports/2019-01-27/debian-10.0-ppc64-NETINST-1.iso Then checked the SHA512 and burned that to a DVD-RW. All seemed to go well. Except in the other PowerMac G5 this dvd is not bootable. Nope. So I took that dvd-rw back to the machine that did the burn process and thanks to the great software from Jorg Schilling I read the iso image back in from the dvd-rw media and everything matches perfectly : # /opt/schily/bin/readcd --version readcd 3.02a10 2018/05/14 (powerpc64-unknown-linux-gnu) Copyright (C) 1987, 1995-2018 Joerg Schilling # # /opt/schily/bin/readcd -v -dev=0,1,0 meshpoints=32 speed=4 f=foo scsidev: '0,1,0' scsibus: 0 target: 1 lun: 0 Linux sg driver version: 3.5.36 Read speed: 3324 kB/s (CD 18x, DVD 2x, BD 0x). Write speed: 2770 kB/s (CD 15x, DVD 2x, BD 0x). Capacity: 112236 Blocks = 224472 kBytes = 219 MBytes = 229 prMB Sectorsize: 2048 Bytes Copy from SCSI (0,1,0) disk to file 'foo' end: 112236 addr: 3520 cnt: 64 3520 1028.53 addr: 7040 cnt: 64 7040 1473.62 addr: 10560 cnt: 64 10560 1478.76 addr: 14080 cnt: 64 14080 1483.63 addr: 17536 cnt: 64 17536 1489.45 addr: 21056 cnt: 64 21056 1494.70 addr: 24576 cnt: 64 24576 1499.99 addr: 28096 cnt: 64 28096 1504.69 addr: 31616 cnt: 64 31616 1510.05 addr: 35072 cnt: 64 35072 1514.63 addr: 38592 cnt: 64 38592 1519.60 addr: 42112 cnt: 64 42112 1524.74 addr: 45632 cnt: 64 45632 1529.59 addr: 49152 cnt: 64 49152 1535.45 addr: 52608 cnt: 64 52608 1540.68 addr: 56128 cnt: 64 56128 1546.99 addr: 59648 cnt: 64 59648 1551.65 addr: 63168 cnt: 64 63168 1556.34 addr: 66688 cnt: 64 66688 1561.73 addr: 70144 cnt: 64 70144 1567.99 addr: 73664 cnt: 64 73664 1572.29 addr: 77184 cnt: 64 77184 1576.76 addr: 80704 cnt: 64 80704 1581.26 addr: 84224 cnt: 64 84224 1586.48 addr: 87680 cnt: 64 87680 1591.61 addr: 91200 cnt: 64 91200 1596.32 addr: 94720 cnt: 64 94720 1600.92 addr: 98240 cnt: 64 98240 1607.71 addr: 101760 cnt: 64 101760 1612.38 addr: 105216 cnt: 64 105216 1618.17 addr: 108736 cnt: 64 108736 1623.64 addr: 112236 cnt: 44 Time total: 150.703sec Read 224472.00 kB at 1489.5 kB/sec. # ls -lapb *iso foo -rw-r--r-- 1 dclarke devl 229859328 Jan 27 19:07 debian-10.0-ppc64-NETINST-1.iso -rw-r--r-- 1 root root 229859328 Apr 6 02:50 foo # openssl dgst -sha512 -r debian-10.0-ppc64-NETINST-1.iso foo 9175e79c14abf3977f2b4a56294fb55a368aaefe7d3552ca680de2647e8ddc1bb2e63e7f82d2020dc15cefa7f1977bd627dad800651dcc2ff4d499d1bc568c36 *debian-10.0-ppc64-NETINST-1.iso 9175e79c14abf3977f2b4a56294fb55a368aaefe7d3552ca680de2647e8ddc1bb2e63e7f82d2020dc15cefa7f1977bd627dad800651dcc2ff4d499d1bc568c36 *foo # # grep 'ppc64' SHA512SUMS 9175e79c14abf3977f2b4a56294fb55a368aaefe7d3552ca680de2647e8ddc1bb2e63e7f82d2020dc15cefa7f1977bd627dad800651dcc2ff4d499d1bc568c36 debian-10.0-ppc64-NETINST-1.iso # Well damn. So the dvd is flawless and won't boot. No idea why. I can try it on a PowerMac G5 quad unit and see what happens however the other netinst I had from 2018 seemed to work fine everywhere. I will try this on an different G5 and see what happens. If that doesn't fly then I will try the image from 2019-01-26. -- Dennis Clarke RISC-V/SPARC/PPC/ARM/CISC UNIX and Linux spoken GreyBeard and suspenders optional