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Danatela
Asked: 2014-04-14 19:45:56 +0800 CST

Change initramfs script

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I made RAID 0 by mdadm'ing partition located on dmraid VIA VT6421 and Western Digital hdd. Installed Ubuntu on that RAID. Now, when I boot, I get (initramfs) ash prompt.

There, I have to write

mdadm --stop /dev/md1
mdadm --assemble --scan

And hit Ctrl+D to resume. Then Ubuntu loads normally.

I'd like to change that behavior to save my time. So, I need to change some script located in /scripts directory of initial ramdisk. But everything I know about initramfs is that it is gzipped. I looked into update-initramfs but didn't find the clue yet. Also, I'm afraid doing something there unless I know what I'm doing.

How do I change my initramfs script?

UPD: Now I know I should 

gunzip -c initrd.img-3.13.0-24-generic | cpio -id

Then make my changes and recreate it with

find . | cpio -o | gzip -c >/boot/initrd.new.img-3.13.0-24-generic

But I still don't know which scripts I should edit.

UPD2: sudo parted -l

$ sudo parted -l
Model: JetFlash Transcend 32GB (scsi)
Disk /dev/sda: 32,1GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos

Number  Start  End     Size    Type     File system  Flags
 1      131kB  32,1GB  32,1GB  primary  fat32        boot, lba


Model: WD My Passport 074A (scsi)
Disk /dev/sdb: 1000GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos

Number  Start   End     Size    Type     File system  Flags
 1      1049kB  1000GB  1000GB  primary  ntfs


Model: ATA WDC WD1600JS-22M (scsi)
Disk /dev/sdc: 160GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos

Number  Start   End    Size   Type     File system     Flags
 1      1049kB  160GB  160GB  primary  linux-swap(v1)


Error: Can't have a partition outside the disk!                           

Model: ATA WDC WD5000AAKS-0 (scsi)
Disk /dev/sde: 500GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos

Number  Start  End  Size  Type  File system  Flags


Error: /dev/mapper/via_ecedbfaihb6: unrecognised disk label               

Model: Linux device-mapper (linear) (dm)
Disk /dev/mapper/via_ecedbfaihb5: 524MB
Sector size (logical/physical): 512B/512B
Partition Table: loop

Number  Start  End    Size   File system  Flags
 1      0,00B  524MB  524MB  ext4


Error: Can't have a partition outside the disk!                           

Model: Linux device-mapper (linear) (dm)
Disk /dev/mapper/via_ecedbfaihb2: 167GB
Sector size (logical/physical): 512B/512B
Partition Table: loop

Number  Start  End    Size   File system  Flags
 1      0,00B  167GB  167GB  ntfs


Model: Linux device-mapper (linear) (dm)
Disk /dev/mapper/via_ecedbfaihb1: 367MB
Sector size (logical/physical): 512B/512B
Partition Table: loop

Number  Start  End    Size   File system  Flags
 1      0,00B  367MB  367MB  ntfs


Error: Can't have a partition outside the disk!                           

Model: Linux Software RAID Array (md)
Disk /dev/md1: 320GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos

Number  Start   End     Size    Type     File system     Flags
 1      1049kB  6494MB  6493MB  primary  linux-swap(v1)
 2      6494MB  27,5GB  21,0GB  primary  ext4
 3      27,5GB  320GB   293GB   primary  ext4

Transcription:

  • /dev/sda & /dev/sdb each of 500GB is fakeraid named via_ecedbfaihb,
  • Win8.1 reserved partition on via_ecedbfaihb1 (390MB),
  • Win 8.1 system partition on via_ecedbfaihb2 (160GB),
  • extended partition via_ecedbfaihb3,
  • linux boot partition via_ecedbfaihb5 (500MB),
  • mdadm 1st partition via_ecedbfaihb6 (159GB),
  • data partition via_ecedbfaihb7 with the rest of space
  • /dev/sdc1 mdadm second partition (159GB),
  • /dev/md1 made of via_ecedbfaihb6 and sdc1,
  • /dev/md1p1 swap (6GB),
  • /dev/md1p2 extended,
  • /dev/md1p5 root (20GB),
  • /dev/md1p6 home (~300GB)
boot

0 Answers