On 23 July 2016 04:29:50 CEST, James <wirel...@tampabay.rr.com> wrote: > R0b0t1 <r030t1 <at> gmail.com> writes: > > > On Jul 22, 2016 5:43 PM, "Neil Bothwick" <neil <at> digimed.co.uk> > wrote: > > > I take it this is a limitation of Apple's firmware as I have set > up a > > > number of uUEFI systems and never had to do this. > > > It is. > > > There is another document that talks in depth about the issue, > although > it was centric to using gpt disk on a bios world that was slowly > moving > to efi [1]. > > > [1] http://mjg59.dreamwidth.org/8035.html > > Here is the essence:: > "But most BIOSes (and most older operating systems) don't understand > GPT, so > plugging in a GPT-partitioned disk would result in the system > believing that > the drive was uninitialised. This is avoided by specifying a > protective MBR. > This is a valid MBR partition table with a single partition covering > the > entire disk (or the first 2.2TB of the disk if it's larger than that) > and > the partition type set to 0xee ("GPT Protective"). GPT-unaware BIOSes > and > operating systems will see a partition they don't understand and > simply > ignore it." > > > I do not know how to set up a 'protective MBR', that's my issue. This > reference goes on to talk about how the code was written for parted > but > never made the permanent status. It sure would fix a lot of > installation > issues among many different distros. An excellent read, if anyone has > the > time. Me, I'm going to use this method:: > > 1. First, write an example of what the partition table should look > like. > > 2. Figure out the separate tools & sequences to achieve the final > result. > > 3. Document the steps so they are clearly available for our community. > > 4. Hope that one of the devs/hackers spins a patched version of a > "parted" > formatting tool to achieve this ability, system-rescue seems to be > the best > home. Or if a patched parted only lives in an overlay, that would ease > quite > a lot of pain for many folks as in my research experience, setting up > the > disk partitioning schemes is the toughest part of an installation > these > days. This duality of disk usage is critical to my cluster testing > schema. > I'll also have a variety of bootstap codes to deal with from various > embedded systems, in addition to commonly purchased hardware > platforms, so > extending the formatting to other forms of storage, in a consistent > and > generic way, provides an even greater appeal. > > From the same doc:: > "It violates the spec and it confuses the majority of partitioning > tools. I > wrote some code to make parted do it at one point, but I don't believe > it > was ever merged. It's very difficult to make it work well. " > > They discuss also some of the MAC family of issues and explain why > macs > still suffer from this malaise. I hope that code is still around.... > > > Thanks for all the advice and help. > James
Step 1: Use gdisk to create a 1M partition at the start of the disk. Step 2: Set its type to EF02 Step 3: There is no step 3,don't overcomplicate things, all the information you need has already been posted. -- Sent from my Android phone with K-9 Mail. Please excuse my brevity.
