Re: [Gptfdisk-general] sgdisk and Hybrid without prepend of EFI partition support
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Re: [Gptfdisk-general] sgdisk and Hybrid without prepend of EFI partition support
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From: Mario F. <mar...@gm...> - 2012-11-21 15:49:49
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small correction fidsk sees it like that when i use the pipe version -------------------------------------------------------------------------- GenLSPro ~ # fdisk /dev/sda Welcome to fdisk (util-linux 2.22.1). Changes will remain in memory only, until you decide to write them. Be careful before using the write command. WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util fdisk doesn't support GPT. Use GNU Parted. Command (m for help): p Disk /dev/sda: 100.0 GB, 100030242816 bytes, 195371568 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/sda1 * 2048 616447 307200 83 Linux /dev/sda4 1 2047 1023+ ee GPT Partition table entries are not in disk order Command (m for help): ------------------------------------------------------ but sgdisk -h 1 creates ------------------------------------------------------------- GenLSPro ~ # fdisk /dev/sda Welcome to fdisk (util-linux 2.22.1). Changes will remain in memory only, until you decide to write them. Be careful before using the write command. WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util fdisk doesn't support GPT. Use GNU Parted. Command (m for help): p Disk /dev/sda: 100.0 GB, 100030242816 bytes, 195371568 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/sda1 1 2047 1023+ ee GPT /dev/sda2 2048 616447 307200 83 Linux Command (m for help): ^C and with this the u-boot of the device finds the GPT as first part and this is not working my request was the posiblity to change this also for the sgdisk so that i can say the ee GPT disk is not part 1 in mbr (yes my explanation was not good) 2012/11/21 Mario Fetka <mar...@gm...> > i am in the process of creating a gentoo based distributin for Buffalo nas > devices from the version of MBR based u-boot to the new versions that only > support GPT partitions. beacuase of the "be cost effevtive" these devices > onyl support most of the times only mbr or gpt (small flash rom 512kb) > i dont want to stress on creating 2 different versions of the disk images > one for the old and one for the new devices > so i use the hybrid and it works great > let the first part appear as mbr and then linux will work on as gpt > and the gpt based also work > mbr is a woraround these old u-boot boot managers > > for ex > > GenLSPro ~ # sgdisk -p /dev/sda > Disk /dev/sda: 195371568 sectors, 93.2 GiB > Logical sector size: 512 bytes > Disk identifier (GUID): 45311E30-AEFA-454F-9A1A-E5DC2632D0D0 > Partition table holds up to 128 entries > First usable sector is 34, last usable sector is 195371534 > Partitions will be aligned on 2048-sector boundaries > Total free space is 2014 sectors (1007.0 KiB) > > Number Start (sector) End (sector) Size Code Name > 1 2048 616447 300.0 MiB 8300 Linux filesystem > 2 616448 168388607 80.0 GiB 8300 Linux filesystem > 3 168388608 170485759 1024.0 MiB 8200 Linux swap > 4 170485760 195371534 11.9 GiB 8300 Linux filesystem > > > GenLSPro ~ # fdisk /dev/sda > Welcome to fdisk (util-linux 2.22.1). > > Changes will remain in memory only, until you decide to write them. > Be careful before using the write command. > > > WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util fdisk > doesn't support GPT. Use GNU Parted. > > > Command (m for help): p > > Disk /dev/sda: 100.0 GB, 100030242816 bytes, 195371568 sectors > Units = sectors of 1 * 512 = 512 bytes > Sector size (logical/physical): 512 bytes / 512 bytes > I/O size (minimum/optimal): 512 bytes / 512 bytes > Disk identifier: 0x00000000 > > Device Boot Start End Blocks Id System > /dev/sda1 * 2048 616447 307200 83 Linux > > Partition table entries are not in disk order > > Command (m for help): > > yes its a special case but would simplyfy my automatic image creatin > process > now i am piping and its only working 2 of 3 times > r > h > 1 > n > 83 > y > n > w > y | gdisk /dev/sda > > > 2012/11/21 Rod Smith <rod...@ro...> > >> On 11/21/2012 06:45 AM, Mario Fetka wrote: >> > sgdisk when run with -h to create a Hybrid part/tables will always add >> > an EFI part bevore the specified partitons >> > a EFI part is not needed on arm devices >> > >> > could you plz add for ex >> > >> > -H, --hybrid-noefi=partnum[:partnum...] >> > create hybrid MBR without prepended EFI >> >> If I understand correctly, you're saying that you've got an ARM device >> that will recognize a GPT disk even without a 0xEE protective partition >> in the MBR. I've never before heard of an OS or utility that would >> interpret a disk as GPT even when it's lacking a 0xEE protective MBR >> partition. I'm reluctant to add support for creating such disks because >> so many other OSes and utilities will NOT interpret them as you might >> expect, so this will just end up creating more problems, beyond those >> that hybrid MBRs already create. >> >> If you can point me to more detailed documentation of what can actually >> use such an extreme configuration and why it might be helpful, I might >> reconsider this decision. >> >> -- >> Rod Smith >> rod...@ro... >> http://www.rodsbooks.com >> >> >> ------------------------------------------------------------------------------ >> Monitor your physical, virtual and cloud infrastructure from a single >> web console. Get in-depth insight into apps, servers, databases, vmware, >> SAP, cloud infrastructure, etc. Download 30-day Free Trial. >> Pricing starts from $795 for 25 servers or applications! >> http://p.sf.net/sfu/zoho_dev2dev_nov >> _______________________________________________ >> Gptfdisk-general mailing list >> Gpt...@li... >> https://lists.sourceforge.net/lists/listinfo/gptfdisk-general >> > > |
