On Tuesday 31 October 2017 at 16:40:13, Hendrik Boom wrote: > On Mon, Oct 30, 2017 at 12:08:55PM -0400, Steve Litt wrote: > > > > I always try to boot MBR. > > Beyond a certains size of disk you need GPT partitioning. Is it > still possible to use MBR boot on a GPT disk?
Yes. https://en.wikipedia.org/wiki/GUID_Partition_Table#MBR_variants Linux utilities such as gdisk and grub will quite happily install a protective MBR partition on a 2+Tb disk and this lets you use big disks on machines which only recognise MBR. Here's an example from a 3Tbyte disk I have here in an HP NL40 Microserver: # fdisk -l /dev/sda WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util fdisk doesn't support GPT. Use GNU Parted. Disk /dev/sda: 3000.6 GB, 3000592982016 bytes 256 heads, 63 sectors/track, 363376 cylinders, total 5860533168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/sda1 1 4294967295 2147483647+ ee GPT # gdisk -l /dev/sda GPT fdisk (gdisk) version 0.8.5 Partition table scan: MBR: protective BSD: not present APM: not present GPT: present Found valid GPT with protective MBR; using GPT. Disk /dev/sda: 5860533168 sectors, 2.7 TiB Logical sector size: 512 bytes Disk identifier (GUID): E1C51CB7-22C1-4EAD-BFB0-A63DE10FBCC6 Partition table holds up to 128 entries First usable sector is 34, last usable sector is 5860533134 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 4095 1024.0 KiB EF02 BIOS boot partition 2 4096 41947135 20.0 GiB FD00 Linux RAID 3 41947136 44044287 1024.0 MiB 8200 Linux swap 4 44044288 5860533134 2.7 TiB FD00 Linux RAID Antony. -- Numerous psychological studies over the years have demonstrated that the majority of people genuinely believe they are not like the majority of people. Please reply to the list; please *don't* CC me. _______________________________________________ Dng mailing list Dng@lists.dyne.org https://mailinglists.dyne.org/cgi-bin/mailman/listinfo/dng
