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Offline ayla

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fdisk/gdisk and gpt
« on: 2014/10/13, 23:47:25 »
Hi,

 anyone an idea whats that good for?

/dev/sda is my main drive, sda1 is my / and sda2 my /home as sda3 and 4 are / and /home of an older siduction installation I kept. sda5 is /data.
Quote
fdisk -l
Disk /dev/sda: 119,2 GiB, 128035676160 bytes, 250069680 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: F4138040-7A1E-45B1-AB65-0A874822EE18

Device         Start       End  Sectors  Size Type
/dev/sda1       2048  31459327 31457280   15G Microsoft basic data
/dev/sda2   31459328  73402367 41943040   20G Microsoft basic data
/dev/sda3   73402368 109053951 35651584   17G Microsoft basic data
/dev/sda4  109053952 153094143 44040192   21G Microsoft basic data
/dev/sda5  153094144 250068991 96974848 46,2G Linux filesystem

 gdisk -l /dev/sda
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/sda: 250069680 sectors, 119.2 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): F4138040-7A1E-45B1-AB65-0A874822EE18
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 250069646
Partitions will be aligned on 2048-sector boundaries
Total free space is 2669 sectors (1.3 MiB)

Number  Start (sector)    End (sector)  Size       Code  Name
   1            2048        31459327   15.0 GiB    0700  Linux filesystem
   2        31459328        73402367   20.0 GiB    0700  Linux filesystem
   3        73402368       109053951   17.0 GiB    0700  Linux filesystem
   4       109053952       153094143   21.0 GiB    0700  Linux filesystem
   5       153094144       250068991   46.2 GiB    8300 


greets
ayla


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Offline GoinEasy9

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  • Posts: 461
Re: fdisk/gdisk and gpt
« Reply #1 on: 2014/10/14, 00:11:08 »
I've been noticing the same thing myself for a while:

Code: [Select]
# fdisk -l

Disk /dev/sda: 1.4 TiB, 1500301910016 bytes, 2930277168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: gpt
Disk identifier: 78410F99-5523-4B97-9434-ADBBDF60DB07

Device          Start        End   Sectors   Size Type
/dev/sda1        2048     401407    399360   195M EFI System
/dev/sda2      401408    2498559   2097152     1G Microsoft basic data
/dev/sda3     2498560  736501759 734003200   350G Microsoft basic data
/dev/sda4   736501760  820387839  83886080    40G Microsoft basic data
/dev/sda5   820387840  853942271  33554432    16G Linux swap
/dev/sda6   853942272  916856831  62914560    30G Microsoft basic data
/dev/sda7   916856832 1650860031 734003200   350G Microsoft basic data
/dev/sda8  1650860032 1713774591  62914560    30G Microsoft basic data
/dev/sda9  1713774592 2447777791 734003200   350G Microsoft basic data
/dev/sda10 2447777792 2449874943   2097152     1G Microsoft basic data
/dev/sda11 2449874944 2930276351 480401408 229.1G Microsoft basic data

Parted, at least, shows it as flags:

Code: [Select]
# parted                                                                   
GNU Parted 3.2                                                                                                   
Using /dev/sda                                                                                                   
Welcome to GNU Parted! Type 'help' to view a list of commands.                                                   
(parted) print                                                                                                   
Model: ATA ST1500DM003-9YN1 (scsi)                                                                               
Disk /dev/sda: 1500GB                                                                                           
Sector size (logical/physical): 512B/4096B                                                                       
Partition Table: gpt                                                                                             
Disk Flags:                                                                                                     

Number  Start   End     Size    File system     Name                  Flags
 1      1049kB  206MB   204MB   fat16           EFI System Partition  boot, esp
 2      206MB   1279MB  1074MB  ext3                                  msftdata
 3      1279MB  377GB   376GB   ext4                                  msftdata
 4      377GB   420GB   42.9GB  ext4                                  msftdata
 5      420GB   437GB   17.2GB  linux-swap(v1)
 6      437GB   469GB   32.2GB  ext4                                  msftdata
 7      469GB   845GB   376GB   ext4                                  msftdata
 8      845GB   877GB   32.2GB  ext4                                  msftdata
 9      877GB   1253GB  376GB   ext4                                  msftdata
10      1253GB  1254GB  1074MB  ext4                                  msftdata
11      1254GB  1500GB  246GB   ext4                                  msftdata

It is annoying.  Seeing Linux ext4 filesystems shown as Microsoft data.
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Offline musca

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Re: fdisk/gdisk and gpt
« Reply #2 on: 2014/10/17, 13:10:43 »
Hello ayla,

what a nice finding!

Why do you see this now?
Fdisk is part of the util-linux package which was largely unmaintained in debian. There only have been non-maintainer-uploads (NMUs) for years. Now the situation has changed and with the new packages came a new fdisk. I think, the old fdisk just wasn't capable.

Okay, and what is this about?
Rod Smith, the author of the "GPT fdisk" variants (gdisk, cgdisk, sgdisk and libparted), has an explanation http://www.rodsbooks.com/linux-fs-code/ .


greetings
musca
„Es irrt der Mensch, solang er strebt.“  (Goethe, Faust)

Offline GoinEasy9

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  • Posts: 461
Re: fdisk/gdisk and gpt
« Reply #3 on: 2014/10/17, 16:44:34 »
Thanks for the link musca, it does explain a lot.
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