HomeServer21 の編集

#contents()
*** 課題 [#a08e81b0]
Ubuntu 18.04 のアップデート処理実行の最後で gurb の書き込みに失敗する
*** 現在のディスクレイアウト[#yb44521d]

munakata@mvc:~$ lsblk -e 7
 NAME        MAJ:MIN RM   SIZE RO TYPE  MOUNTPOINT
 sda           8:0    0   7.3T  0 disk
 └─sda1        8:1    0   7.3T  0 part
   └─md0       9:0    0   7.3T  0 raid1 /mnt/raid_vol
 sdb           8:16   0   7.3T  0 disk
 └─sdb1        8:17   0   7.3T  0 part
   └─md0       9:0    0   7.3T  0 raid1 /mnt/raid_vol
 sdc           8:32   0   7.3T  0 disk
 └─sdc1        8:33   0   7.3T  0 part  /mnt/dtv_h264
 sdd           8:48   0   2.7T  0 disk
 └─sdd1        8:49   0   2.7T  0 part  /mnt/dtv_recipe
 sde           8:64   1   3.7T  0 disk
 └─sde1        8:65   1   3.7T  0 part  /mnt/dtv_slave
 sdf           8:80   1   7.3T  0 disk
 └─sdf1        8:81   1   7.3T  0 part  /mnt/dtv_h264B
 sdg           8:96   1   3.7T  0 disk
 └─sdg1        8:97   1   3.7T  0 part  /mnt/dtv_recover
 nvme0n1     259:0    0 232.9G  0 disk
 ├─nvme0n1p1 259:1    0   218G  0 part  /
 ├─nvme0n1p2 259:2    0     1K  0 part
 └─nvme0n1p5 259:3    0    15G  0 part

- -e(--exclude) 7 は loop デバイスを表示しないオプション

*** 現在のパーティションの構成（全ディスク共通） [#wf391b7c]

munakata@mvc:~$ sudo gdisk /dev/sdd
 GPT fdisk (gdisk) version 1.0.3
 
 Partition table scan:
   MBR: protective
   BSD: not present
   APM: not present
   GPT: present
 
 Found valid GPT with protective MBR; using GPT.
 
 Command (? for help): p
 Disk /dev/sdd: 5860533168 sectors, 2.7 TiB
 Model: WDC WD30EFRX-68E
 Sector size (logical/physical): 512/4096 bytes
 Disk identifier (GUID): D8D7C399-0DC3-4619-8D01-855D2E93A2ED
 Partition table holds up to 128 entries
 Main partition table begins at sector 2 and ends at sector 33
 First usable sector is 34, last usable sector is 5860533134
 Partitions will be aligned on 2048-sector boundaries
 Total free space is 2925 sectors (1.4 MiB)
 
 Number  Start (sector)    End (sector)  Size       Code  Name
    1            2048      5860532223   2.7 TiB     8300
 
 Command (? for help):

- パーティションはセクター2048からスタートする1つしかない。
- BIOS boot partition が無いので grub の書き込みに失敗する

*** BIOS boot partition をディスクの先頭に追加する [#kd8b152a]

Command (? for help): n
 Partition number (2-128, default 2):
 First sector (34-5860533134, default = 34) or {+-}size{KMGTP}: 34
 Last sector (34-2047, default = 2047) or {+-}size{KMGTP}: 2047
 Current type is 'Linux filesystem'
 Hex code or GUID (L to show codes, Enter = 8300): ef02
 Changed type of partition to 'BIOS boot partition'
 
 Command (? for help): p
 Disk /dev/sdd: 5860533168 sectors, 2.7 TiB
 Model: WDC WD30EFRX-68E
 Sector size (logical/physical): 512/4096 bytes
 Disk identifier (GUID): D8D7C399-0DC3-4619-8D01-855D2E93A2ED
 Partition table holds up to 128 entries
 Main partition table begins at sector 2 and ends at sector 33
 First usable sector is 34, last usable sector is 5860533134
 Partitions will be aligned on 2048-sector boundaries
 Total free space is 911 sectors (455.5 KiB)
 
 Number  Start (sector)    End (sector)  Size       Code  Name
    1            2048      5860532223   2.7 TiB     8300
    2              34            2047   1007.0 KiB  EF02  BIOS boot partition
 
 Command (? for help): w
 
 Final checks complete. About to write GPT data. THIS WILL OVERWRITE EXISTING
 PARTITIONS!!
 
 Do you want to proceed? (Y/N): Y
 OK; writing new GUID partition table (GPT) to /dev/sdd.
 Warning: The kernel is still using the old partition table.
 The new table will be used at the next reboot or after you
 run partprobe(8) or kpartx(8)
 The operation has completed successfully.

- BIOS boot partition のタイプは &color(red){ef02};
- 既存のパーティションの前方の空き領域に新規に &color(red){BIOS boot partition}; を作成する

*** grub インストールに成功 [#m1474d57]

munakata@mvc:~$ sudo grub-install /dev/sdd
 Installing for i386-pc platform.
 Installation finished. No error reported.
 munakata@mvc:~$

- 全ディスク (md0 を構成する /dev/sda, /dev/sdb を含む）に grub を書き込んだ

*** 参考 URL[#ubee10a3]
- [[GPT HDD に grub2 をインストールする際の tips:https://www.miraclelinux.com/tech-blog/qwi8ni]]

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