On 10-09-2014 15:12, Bruce Dubbs wrote: > Ken Moffat wrote: >> Also, for LFS the UUID stuff in grub.cfg is not needed, and will >> cause pain if you ever have to restore backups to a new disk. > > You can specify a partition uuid. No initrd required. For example: > > linux /bzImage root=PARTUUID=666c2eee-193d-42db-a490-4c444342bd4e ro > > The partition UUID is not the same as a filesystem UUID and the > partition table must be of type GPT (another advantage of GPT). To find > it, type something like: > > $ blkid /dev/sdb1 > /dev/sdb1: UUID="e337b2bd-3899-4307-b374-e1c4cb1b5b8e" TYPE="ext4" > PARTLABEL="Linux filesystem" > PARTUUID="4a1bdb85-2937-4c44-96bc-c9387c43779a" > > There are advantages and disadvantages. A disadvantage is, as stated > above, when restoring a backup. An advantage is more consistency on > large hard drives where partitions may be created and deleted more > frequently.
While we are here, my technical problem was trying to use for the first time gpt. Before formatting, I searched a lot, including in (B)LFS, because I remembered something about a first partition, Couldn't find, divided the dis in partion ' (ext4) and 2 (swap). After LFS ready, I decided to make a backup of the new virtual HD with LFS-7.6-rc1, and this was my lucky. I use always gparted even to set boot_flag (cannot remember exact name). Obviously, lost the system, and, don't know how, lost the sources directory, but had the backup. Two questions. My question is: How large does partition 1 (boot_gpt) needs to be? Now I have: $ sudo /sbin/gdisk -l /dev/sdc GPT fdisk (gdisk) version 0.8.10 Partition table scan: MBR: protective BSD: not present APM: not present GPT: present Found valid GPT with protective MBR; using GPT. Disk /dev/sdc: 44040192 sectors, 21.0 GiB Logical sector size: 512 bytes Disk identifier (GUID): D4581B4F-4EBB-4290-9067-29B688B9CABE Partition table holds up to 128 entries First usable sector is 34, last usable sector is 44040158 Partitions will be aligned on 1-sector boundaries Total free space is 5994 sectors (2.9 MiB) Number Start (sector) End (sector) Size Code Name 1 34 2104514 1.0 GiB EF02 2 2104515 37752749 17.0 GiB 0700 3 37752750 44034164 3.0 GiB 8200 Also have the second disk, with home, opt and two small test partitions, used for BLFS tests of package updates: Number Start (sector) End (sector) Size Code Name 1 34 27262304 13.0 GiB 8300 2 27262305 41945714 7.0 GiB 8300 3 41945715 44050229 1.0 GiB 8300 4 44050230 46137310 1019.1 MiB 8300 Question 2: why Code 0700 in sdc2, if I formatted as ext4, so it should be Code 8300? I am delayed because of this problem (and learning) but also the other particular problem afterwards, which will need me to stop soon again. -- []s, Fernando -- http://lists.linuxfromscratch.org/listinfo/lfs-support FAQ: http://www.linuxfromscratch.org/blfs/faq.html Unsubscribe: See the above information page Do not top post on this list. A: Because it messes up the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail? http://en.wikipedia.org/wiki/Posting_style
