Re: BIOS Can Not Find Disk
On 12/04/17 17:34, David Christensen wrote:
That's why I plan to try again with the simplest automagic partitioning
and see what happens.
I wiped the SSD, ran d-i, and chose "Partitioning method" -> "Guided -
use entire disk and set up encrypted LVM", which produced:
LVM VG debian-vg, LV home - 3.5 GB Linux device-mapper (linear)
#1 3.5 GB f ext4 /home
LVM VG debian-vg, LV root - 2.0 GB Linux device-mapper (linear)
#1 2.0 GB f ext4 /
LVM VG debian-vg, LV swap_1 - 8.5 GB Linux device-mapper (linear)
#1 8.5 GB f swap swap
LVM VG debian-vg, LV tmp - 255.9 MB Linux device-mapper (linear)
#1 255.9 MB f ext4 /tmp
LVM VG debian-vg, LV tmp - 998.2 MB Linux device-mapper (linear)
#1 998.2 MB f ext4 /var
Encrypted volume (sda3_crypt) - 15.2 GB Linux device-mapper (crypt)
#1 15.2 GB K lvm
SCSI3 (0,0,0) (sda) - 16.0 GB ATA SAMSUNG SSD UM41
1.0 MB FREE SPACE
#1 536.9 MB B F ESP
#2 255.9 MB F ext2 /boot
#3 15.2 GB K crypto (sda3_crypt)
73.2 kB FREE SPACE
I tried changing swap size, but that led to prompts for actions that
might break things. So, I just accepted the above and moved on.
d-i completed without errors. :-)
The disk boots to the GRUB menu. Letting that time out, LUKS passphrase
prompt is displayed. Entering the passphrase, the login prompt is
displayed. :-)
An SSH session follows.
As for "how does it boot with UEFI, GPT, and GRUB?", my vague guess is:
1. There is no 16-bit 8086 first stage boot loader code in sector 0 of
the SSD -- see 'gpart -d -vvv /dev/sda' output, below. The motherboard
firmware doesn't use this in UEFI mode.
2. There is a "protective MBR" in sector 0 of the SSD -- see 'fdisk -t
mbr -l /dev/sda' output, below. I don't know if UEFI firmware looks at
this.
3. The firmware finds and reads the GPT partition table on the SSD.
4. The firmware finds the first GPT partition and file system, which
look "right" for EFI boot images.
5. The firmware reads this file system and finds only one file, which
it loads and runs (starting GRUB):
/EFI/debian/grubx64.efi
(If there were more than one choice, my guess is that I'd have to
pre-select one in the CMOS setup, or perhaps have to select one from a
menu at the end of POST?)
6. GRUB finds the second GPT partition and file system, which looks
"right" for GRUB, reads the file system, locates the appropriate files
(notably /boot/grub/grub.cfg), and boots the system.
Again -- are there any other commands I should run that readers might
find interesting?
David
--
root@debian:~# cat /etc/debian_version
9.2
root@debian:~# uname -a
Linux debian 4.9.0-4-amd64 #1 SMP Debian 4.9.51-1 (2017-09-28) x86_64
GNU/Linux
root@debian:~# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 14.9G 0 disk
|-sda1 8:1 0 512M 0 part /boot/efi
|-sda2 8:2 0 244M 0 part /boot
`-sda3 8:3 0 14.2G 0 part
`-sda3_crypt 254:0 0 14.2G 0 crypt
|-debian--vg-root 254:1 0 1.9G 0 lvm /
|-debian--vg-var 254:2 0 952M 0 lvm /var
|-debian--vg-swap_1 254:3 0 7.9G 0 lvm [SWAP]
|-debian--vg-tmp 254:4 0 244M 0 lvm /tmp
`-debian--vg-home 254:5 0 3.2G 0 lvm /home
sr0 11:0 1 1024M 0 rom
root@debian:~# parted /dev/sda u s p free
Model: ATA SAMSUNG SSD UM41 (scsi)
Disk /dev/sda: 31277232s
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags:
Number Start End Size File system Name Flags
34s 2047s 2014s Free Space
1 2048s 1050623s 1048576s fat32 boot, esp
2 1050624s 1550335s 499712s ext2
3 1550336s 31277055s 29726720s
31277056s 31277198s 143s Free Space
root@debian:~# gpart -d -vvv /dev/sda
dev(/dev/sda) mss(512) chs(1946/255/63)(LBA) #s(31277232) size(15272mb)
Primary partition(1)
type: 238(0xEE)(UNKNOWN)
size: 15272mb #s(31277231) s(1-31277231)
chs: (0/0/1)-(1023/254/63)d (0/0/2)-(1946/233/63)r
hex: 00 00 01 00 EE FE FF FF 01 00 00 00 AF 40 DD 01
Primary partition(2)
type: 000(0x00)(unused)
size: 0mb #s(0) s(0-0)
chs: (0/0/0)-(0/0/0)d (0/0/0)-(0/0/0)r
hex: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Primary partition(3)
type: 000(0x00)(unused)
size: 0mb #s(0) s(0-0)
chs: (0/0/0)-(0/0/0)d (0/0/0)-(0/0/0)r
hex: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Primary partition(4)
type: 000(0x00)(unused)
size: 0mb #s(0) s(0-0)
chs: (0/0/0)-(0/0/0)d (0/0/0)-(0/0/0)r
hex: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
dev(/dev/sda) master boot record (w/o partition table):
0000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
. . . . . . . . . . . . . . . .
0010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
. . . . . . . . . . . . . . . .
0020: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
. . . . . . . . . . . . . . . .
0030: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
. . . . . . . . . . . . . . . .
0040: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
. . . . . . . . . . . . . . . .
0050: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
. . . . . . . . . . . . . . . .
0060: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
. . . . . . . . . . . . . . . .
0070: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
. . . . . . . . . . . . . . . .
0080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
. . . . . . . . . . . . . . . .
0090: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
. . . . . . . . . . . . . . . .
00A0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
. . . . . . . . . . . . . . . .
00B0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
. . . . . . . . . . . . . . . .
00C0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
. . . . . . . . . . . . . . . .
00D0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
. . . . . . . . . . . . . . . .
00E0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
. . . . . . . . . . . . . . . .
00F0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
. . . . . . . . . . . . . . . .
0100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
. . . . . . . . . . . . . . . .
0110: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
. . . . . . . . . . . . . . . .
0120: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
. . . . . . . . . . . . . . . .
0130: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
. . . . . . . . . . . . . . . .
0140: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
. . . . . . . . . . . . . . . .
0150: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
. . . . . . . . . . . . . . . .
0160: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
. . . . . . . . . . . . . . . .
0170: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
. . . . . . . . . . . . . . . .
0180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
. . . . . . . . . . . . . . . .
0190: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
. . . . . . . . . . . . . . . .
01A0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
. . . . . . . . . . . . . . . .
root@debian:~# gdisk -l /dev/sda
GPT fdisk (gdisk) version 1.0.1
Partition table scan:
MBR: protective
BSD: not present
APM: not present
GPT: present
Found valid GPT with protective MBR; using GPT.
Disk /dev/sda: 31277232 sectors, 14.9 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): 1423ACF9-1BA2-404D-A4FC-52576318EFCF
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 31277198
Partitions will be aligned on 2048-sector boundaries
Total free space is 2157 sectors (1.1 MiB)
Number Start (sector) End (sector) Size Code Name
1 2048 1050623 512.0 MiB EF00
2 1050624 1550335 244.0 MiB 8300
3 1550336 31277055 14.2 GiB 8300
root@debian:~# fdisk -t mbr -l /dev/sda
Disk /dev/sda: 14.9 GiB, 16013942784 bytes, 31277232 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
Disklabel type: dos
Disk identifier: 0x00000000
Device Boot Start End Sectors Size Id Type
/dev/sda1 1 31277231 31277231 14.9G ee GPT
root@debian:~# fdisk -l /dev/sda
Disk /dev/sda: 14.9 GiB, 16013942784 bytes, 31277232 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
Disklabel type: gpt
Disk identifier: 1423ACF9-1BA2-404D-A4FC-52576318EFCF
Device Start End Sectors Size Type
/dev/sda1 2048 1050623 1048576 512M EFI System
/dev/sda2 1050624 1550335 499712 244M Linux filesystem
/dev/sda3 1550336 31277055 29726720 14.2G Linux filesystem
root@debian:~# lvm lvdisplay
--- Logical volume ---
LV Path /dev/debian-vg/root
LV Name root
VG Name debian-vg
LV UUID iU6J9C-MCbP-RXkU-7gpt-zzu3-3nW2-8ht7OB
LV Write Access read/write
LV Creation host, time debian, 2017-12-04 20:05:01 -0800
LV Status available
# open 1
LV Size 1.86 GiB
Current LE 476
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 254:1
--- Logical volume ---
LV Path /dev/debian-vg/var
LV Name var
VG Name debian-vg
LV UUID GlrAnx-fl2t-MwfR-gCe1-oNFK-75A5-XxF9Ew
LV Write Access read/write
LV Creation host, time debian, 2017-12-04 20:05:01 -0800
LV Status available
# open 1
LV Size 952.00 MiB
Current LE 238
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 254:2
--- Logical volume ---
LV Path /dev/debian-vg/swap_1
LV Name swap_1
VG Name debian-vg
LV UUID fsSVAk-qJxx-r5oO-nAzf-V7tD-P68K-j3PSg0
LV Write Access read/write
LV Creation host, time debian, 2017-12-04 20:05:01 -0800
LV Status available
# open 2
LV Size 7.91 GiB
Current LE 2026
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 254:3
--- Logical volume ---
LV Path /dev/debian-vg/tmp
LV Name tmp
VG Name debian-vg
LV UUID NX7oty-RbhV-LKLQ-mpUh-jZSy-Beo8-N0UKfJ
LV Write Access read/write
LV Creation host, time debian, 2017-12-04 20:05:01 -0800
LV Status available
# open 1
LV Size 244.00 MiB
Current LE 61
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 254:4
--- Logical volume ---
LV Path /dev/debian-vg/home
LV Name home
VG Name debian-vg
LV UUID Q13SCi-BKfV-LF04-0UPz-0lxg-Wb8X-i0LvB5
LV Write Access read/write
LV Creation host, time debian, 2017-12-04 20:05:01 -0800
LV Status available
# open 1
LV Size 3.23 GiB
Current LE 827
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 254:5
root@debian:~# df
Filesystem 1K-blocks Used Available Use% Mounted on
udev 4033908 0 4033908 0% /dev
tmpfs 809232 8928 800304 2% /run
/dev/mapper/debian--vg-root 1886280 688284 1084128 39% /
tmpfs 4046156 0 4046156 0% /dev/shm
tmpfs 5120 0 5120 0% /run/lock
tmpfs 4046156 0 4046156 0% /sys/fs/cgroup
/dev/mapper/debian--vg-home 3268656 11604 3071300 1% /home
/dev/mapper/debian--vg-tmp 237861 2057 219216 1% /tmp
/dev/mapper/debian--vg-var 943128 194612 683392 23% /var
/dev/sda2 241965 38997 190476 17% /boot
/dev/sda1 523248 132 523116 1% /boot/efi
tmpfs 809228 0 809228 0% /run/user/1000
root@debian:~# mount | grep sda1
/dev/sda1 on /boot/efi type vfat
(rw,relatime,fmask=0077,dmask=0077,codepage=437,iocharset=ascii,shortname=mixed,utf8,errors=remount-ro)
root@debian:~# tree /boot
/boot
|-- System.map-4.9.0-4-amd64
|-- config-4.9.0-4-amd64
|-- efi
| `-- EFI
| `-- debian
| `-- grubx64.efi
|-- grub
| |-- fonts
| | `-- unicode.pf2
| |-- grub.cfg
| |-- grubenv
| |-- locale
| | |-- ast.mo
| | |-- ca.mo
| | |-- da.mo
| | |-- de.mo
| | |-- de@hebrew.mo
| | |-- de_CH.mo
| | |-- en@arabic.mo
| | |-- en@cyrillic.mo
| | |-- en@greek.mo
| | |-- en@hebrew.mo
| | |-- en@piglatin.mo
| | |-- en@quot.mo
| | |-- eo.mo
| | |-- es.mo
| | |-- fi.mo
| | |-- fr.mo
| | |-- gl.mo
| | |-- hu.mo
| | |-- id.mo
| | |-- it.mo
| | |-- ja.mo
| | |-- lt.mo
| | |-- nb.mo
| | |-- nl.mo
| | |-- pa.mo
| | |-- pl.mo
| | |-- pt_BR.mo
| | |-- ru.mo
| | |-- sl.mo
| | |-- sr.mo
| | |-- sv.mo
| | |-- tr.mo
| | |-- uk.mo
| | |-- vi.mo
| | |-- zh_CN.mo
| | `-- zh_TW.mo
| |-- unicode.pf2
| `-- x86_64-efi
| |-- acpi.mod
| |-- adler32.mod
| |-- affs.mod
| |-- afs.mod
| |-- ahci.mod
| |-- all_video.mod
| |-- aout.mod
| |-- appleldr.mod
| |-- archelp.mod
| |-- at_keyboard.mod
| |-- ata.mod
| |-- backtrace.mod
| |-- bfs.mod
| |-- bitmap.mod
| |-- bitmap_scale.mod
| |-- blocklist.mod
| |-- boot.mod
| |-- bsd.mod
| |-- bswap_test.mod
| |-- btrfs.mod
| |-- bufio.mod
| |-- cat.mod
| |-- cbfs.mod
| |-- cbls.mod
| |-- cbmemc.mod
| |-- cbtable.mod
| |-- cbtime.mod
| |-- chain.mod
| |-- cmdline_cat_test.mod
| |-- cmp.mod
| |-- cmp_test.mod
| |-- command.lst
| |-- configfile.mod
| |-- core.efi
| |-- cpio.mod
| |-- cpio_be.mod
| |-- cpuid.mod
| |-- crc64.mod
| |-- crypto.lst
| |-- crypto.mod
| |-- cryptodisk.mod
| |-- cs5536.mod
| |-- ctz_test.mod
| |-- date.mod
| |-- datehook.mod
| |-- datetime.mod
| |-- disk.mod
| |-- diskfilter.mod
| |-- div.mod
| |-- div_test.mod
| |-- dm_nv.mod
| |-- echo.mod
| |-- efi_gop.mod
| |-- efi_uga.mod
| |-- efifwsetup.mod
| |-- efinet.mod
| |-- ehci.mod
| |-- elf.mod
| |-- eval.mod
| |-- exfat.mod
| |-- exfctest.mod
| |-- ext2.mod
| |-- extcmd.mod
| |-- fat.mod
| |-- file.mod
| |-- fixvideo.mod
| |-- font.mod
| |-- fs.lst
| |-- fshelp.mod
| |-- functional_test.mod
| |-- gcry_arcfour.mod
| |-- gcry_blowfish.mod
| |-- gcry_camellia.mod
| |-- gcry_cast5.mod
| |-- gcry_crc.mod
| |-- gcry_des.mod
| |-- gcry_dsa.mod
| |-- gcry_idea.mod
| |-- gcry_md4.mod
| |-- gcry_md5.mod
| |-- gcry_rfc2268.mod
| |-- gcry_rijndael.mod
| |-- gcry_rmd160.mod
| |-- gcry_rsa.mod
| |-- gcry_seed.mod
| |-- gcry_serpent.mod
| |-- gcry_sha1.mod
| |-- gcry_sha256.mod
| |-- gcry_sha512.mod
| |-- gcry_tiger.mod
| |-- gcry_twofish.mod
| |-- gcry_whirlpool.mod
| |-- geli.mod
| |-- gettext.mod
| |-- gfxmenu.mod
| |-- gfxterm.mod
| |-- gfxterm_background.mod
| |-- gfxterm_menu.mod
| |-- gptsync.mod
| |-- grub.efi
| |-- gzio.mod
| |-- halt.mod
| |-- hashsum.mod
| |-- hdparm.mod
| |-- hello.mod
| |-- help.mod
| |-- hexdump.mod
| |-- hfs.mod
| |-- hfsplus.mod
| |-- hfspluscomp.mod
| |-- http.mod
| |-- iorw.mod
| |-- iso9660.mod
| |-- jfs.mod
| |-- jpeg.mod
| |-- keylayouts.mod
| |-- keystatus.mod
| |-- ldm.mod
| |-- legacy_password_test.mod
| |-- legacycfg.mod
| |-- linux.mod
| |-- linux16.mod
| |-- linuxefi.mod
| |-- loadbios.mod
| |-- loadenv.mod
| |-- loopback.mod
| |-- ls.mod
| |-- lsacpi.mod
| |-- lsefi.mod
| |-- lsefimmap.mod
| |-- lsefisystab.mod
| |-- lsmmap.mod
| |-- lspci.mod
| |-- lssal.mod
| |-- luks.mod
| |-- lvm.mod
| |-- lzopio.mod
| |-- macbless.mod
| |-- macho.mod
| |-- mdraid09.mod
| |-- mdraid09_be.mod
| |-- mdraid1x.mod
| |-- memdisk.mod
| |-- memrw.mod
| |-- minicmd.mod
| |-- minix.mod
| |-- minix2.mod
| |-- minix2_be.mod
| |-- minix3.mod
| |-- minix3_be.mod
| |-- minix_be.mod
| |-- mmap.mod
| |-- moddep.lst
| |-- modinfo.sh
| |-- morse.mod
| |-- mpi.mod
| |-- msdospart.mod
| |-- mul_test.mod
| |-- multiboot.mod
| |-- multiboot2.mod
| |-- nativedisk.mod
| |-- net.mod
| |-- newc.mod
| |-- nilfs2.mod
| |-- normal.mod
| |-- ntfs.mod
| |-- ntfscomp.mod
| |-- odc.mod
| |-- offsetio.mod
| |-- ohci.mod
| |-- part_acorn.mod
| |-- part_amiga.mod
| |-- part_apple.mod
| |-- part_bsd.mod
| |-- part_dfly.mod
| |-- part_dvh.mod
| |-- part_gpt.mod
| |-- part_msdos.mod
| |-- part_plan.mod
| |-- part_sun.mod
| |-- part_sunpc.mod
| |-- partmap.lst
| |-- parttool.lst
| |-- parttool.mod
| |-- password.mod
| |-- password_pbkdf2.mod
| |-- pata.mod
| |-- pbkdf2.mod
| |-- pbkdf2_test.mod
| |-- pcidump.mod
| |-- play.mod
| |-- png.mod
| |-- priority_queue.mod
| |-- probe.mod
| |-- procfs.mod
| |-- progress.mod
| |-- raid5rec.mod
| |-- raid6rec.mod
| |-- random.mod
| |-- read.mod
| |-- reboot.mod
| |-- regexp.mod
| |-- reiserfs.mod
| |-- relocator.mod
| |-- romfs.mod
| |-- scsi.mod
| |-- search.mod
| |-- search_fs_file.mod
| |-- search_fs_uuid.mod
| |-- search_label.mod
| |-- serial.mod
| |-- setjmp.mod
| |-- setjmp_test.mod
| |-- setpci.mod
| |-- sfs.mod
| |-- shift_test.mod
| |-- signature_test.mod
| |-- sleep.mod
| |-- sleep_test.mod
| |-- spkmodem.mod
| |-- squash4.mod
| |-- syslinuxcfg.mod
| |-- tar.mod
| |-- terminal.lst
| |-- terminal.mod
| |-- terminfo.mod
| |-- test.mod
| |-- test_blockarg.mod
| |-- testload.mod
| |-- testspeed.mod
| |-- tftp.mod
| |-- tga.mod
| |-- time.mod
| |-- tr.mod
| |-- trig.mod
| |-- true.mod
| |-- udf.mod
| |-- ufs1.mod
| |-- ufs1_be.mod
| |-- ufs2.mod
| |-- uhci.mod
| |-- usb.mod
| |-- usb_keyboard.mod
| |-- usbms.mod
| |-- usbserial_common.mod
| |-- usbserial_ftdi.mod
| |-- usbserial_pl2303.mod
| |-- usbserial_usbdebug.mod
| |-- usbtest.mod
| |-- verify.mod
| |-- video.lst
| |-- video.mod
| |-- video_bochs.mod
| |-- video_cirrus.mod
| |-- video_colors.mod
| |-- video_fb.mod
| |-- videoinfo.mod
| |-- videotest.mod
| |-- videotest_checksum.mod
| |-- xfs.mod
| |-- xnu.mod
| |-- xnu_uuid.mod
| |-- xnu_uuid_test.mod
| |-- xzio.mod
| |-- zfs.mod
| |-- zfscrypt.mod
| `-- zfsinfo.mod
|-- initrd.img-4.9.0-4-amd64
|-- lost+found
`-- vmlinuz-4.9.0-4-amd64
8 directories, 312 files
root@debian:~# ls -l /boot/efi/EFI/debian/grubx64.efi
-rwx------ 1 root root 121856 Dec 4 20:23 /boot/efi/EFI/debian/grubx64.efi
root@debian:~# file /boot/efi/EFI/debian/grubx64.efi
/boot/efi/EFI/debian/grubx64.efi: PE32+ executable (EFI application)
x86-64 (stripped to external PDB), for MS Windows
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