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Old 12-15-2017, 08:20 PM   #1
stf92
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Registered: Apr 2007
Location: Buenos Aires.
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GNU parted 3.1: rm 7 removed partitions 7 and 8.


Hi:
Working conditions: running Linux 3.10.17 from the only hard disk on this machine as root. This is the disk:
Code:
root@darkstar:~# parted -l
Model: ATA ST9320423AS (scsi)
Disk /dev/sda: 320GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags: 

Number  Start   End     Size    Type      File system  Flags
 1      1049kB  1000MB  999MB   primary   fat32        boot
 2      1000MB  21.0GB  20.0GB  primary   ntfs
 3      21.0GB  42.5GB  21.5GB  primary   ext2
 4      42.5GB  320GB   278GB   extended               lba
 5      44.0GB  45.0GB  991MB   logical   fat32        lba
 6      45.0GB  234GB   189GB   logical   ext2
 7      234GB   255GB   20.9GB  logical   ext2
 8      255GB   275GB   20.0GB  logical   ext2
 9      275GB   320GB   45.2GB  logical   ntfs
Before running parted this was the output of mounted:
Code:
root@darkstar:~# mount
/dev/sda8 on / type ext2 (rw)
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
/dev/sda6 on /extra type ext2 (rw)
tmpfs on /dev/shm type tmpfs (rw)
/dev/sda9 on /almacen type fuseblk (rw,allow_other,default_permissions,blksize=4096)
gvfsd-fuse on /home/bill/.gvfs type fuse.gvfsd-fuse (rw,nosuid,nodev,user=bill)
root@darkstar:~#
I then ran parted and issued 'rm 7'. I know it immediately executes the command on the disk. It gave a message: trying to communicate to the kernel the device seems busy. Or something like that. I didn't like it and immediately rebooted. But partition 8 (root) had gone for good along with partition 7!

EDIT: I think I know what happened. The root partition received a 7. But not having run lilo yet, the loader redirected control to old partition 7. Had I taken the elementary step of listing the partitions first, I wouldn't be posting now. But maybe it serves somebody. I used to allocate primary partitions for Linux and I am therefor not accostumed to linked partitions, such as logical ones are. Plus there was not udev.

Last edited by stf92; 12-15-2017 at 08:41 PM.
 
Old 12-16-2017, 09:43 AM   #2
yancek
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Registered: Apr 2008
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When a logical partition is deleted, each logical partition with a higher number drops down a number so when you deleted partition 7, your root partition changed from 8 to 7 and I would expect you no longer have a partition 9. I expect the "device seems busy" message you got is because it was changing 8 (root partition) to 7 but exactly how this works, I don't know.

I think your edit paragraph explains and gives the solution.
 
Old 12-17-2017, 06:15 PM   #3
stf92
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Registered: Apr 2007
Location: Buenos Aires.
Distribution: Slackware
Posts: 3,665

Original Poster
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Yes, thanks for your post.
 
  


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