Re: BIOS Can Not Find Disk
- Date: Sun, 3 Dec 2017 18:30:35 -0500
- From: Dan Norton <dnorton@xxxxxxxxxxxxxx>
- Subject: Re: BIOS Can Not Find Disk
On 12/03/2017 02:04 PM, Felix Miata wrote:
Dan Norton composed on 2017-12-04 08:00 (UTC-0500):Felix Miata wrote:Dan Norton composed on 2017-12-03 16:44 (UTC-0500): Note the above is currently from the future. Apparently the PC you are emailing from is advanced one day.Must be a result of my Setup menu activities. Debian says it is 07:48 AM (5 hours late) but I put in the local time from my cell phone in Setup this morning. Maybe I need to set the HW to UTC?That's the preferred time for *nix installations. Check what's in /etc/adjtime to confirm. HW clock needs to match it. Now you're showing 5 hours late.I've been wondering what you do with all those systems, too. It would be much more productive if we worked together. I'm pretty much self-taught.Mostly I try to replicate reported problems and assist in finding solutions, identifying bugs, and doing bug QA. It's getting harder because my supply of free PCs to use for the purpose dried up before UEFI started to show up.Do you ever come to Atlanta? I'm North of it, in Roswell.I've never stopped there except to fuel passing through between here and Wisconsin or Nashville. Last such trip was probably around 25 years ago.Before you give up, it might be worth more investigation of GPT boot foibles outside the Debian zone. Archlinux docs are consistently among the best regardless of distro in use. You might yet have a solution using a simple procedure applied to what you have already done, if only it can be identified. http://www.lightofdawn.org/wiki/wiki.cgi/BIOSBootGPT!!!
After reading this again, did this: # gdisk /dev/sda [...] Command (? for help): x Expert command (? for help): p [...] Number Start (sector) End (sector) Size Code Name 1 2048 411647 200.0 MiB EF00 2 411648 16783359 7.8 GiB 8200 3 16783360 151001087 64.0 GiB 8E00 4 151001088 285218815 64.0 GiB 8E00 5 285218816 419436543 64.0 GiB 8E00 6 419436544 553654271 64.0 GiB 8E00 7 553654272 1953525134 667.5 GiB 8300 [...] Expert command (? for help): a Partition number (1-7): 3 [...] Attribute value is 0000000000000000. Set fields are: No fields set Toggle which attribute field (0-63, 64 or <Enter> to exit): 2 Have enabled the 'legacy BIOS bootable' attribute. Attribute value is 0000000000000004. Set fields are: 2 (legacy BIOS bootable) Toggle which attribute field (0-63, 64 or <Enter> to exit): wI know this needs to be followed by more steps... the reference refers to Syslinux but we're using GRUB. It says:
2. Next, mount the partition somewhere, say in /mnt/data3. Use [GRUB2] to install the boot loader, pretending that it is a regular partition:
4. Copy [ ? ] which is capable of booting GPT partition to the disk's MBR. What is needed to fill the two [...]?The mbr's first 446 bytes are non-empty, but possibly incompatible with bios.