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How to calculate partition Start End Sector?


Disk problems prevent me from booting, or set the disk to read-only. How do I fix the disk?How to format a 1GB USB stick to FAT32 with 512 bytes sector?Expanding root partition CentOS 6 With using fdiskHow to extend logical & extended partition with fdiskExtend partition using LVMHost unreachable after resizing partitionCorrupted ntfs volume mounting problemI have a dedicated with 2 SSDs, how to I group them to behave as 1?Wrong fs type, bad option, bad superblock on /dev/sdXExternal HDD failure due to bad blocks






.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;








6















I am wondering what Start and End value to choose when partitioning my ext. SSD using fdisk.



fdisk suggests 2048-250069679, default 2048 but 250069679 cannot be divided by 512 nor by 2048. Wouldn't it be better to set the Start and End value to a number that can be devided by 512 or 2048 or 4096?



For example: Start 4096 and End 250068992




Command (m for help): p

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: dos
Disk identifier: 0xa4b57300


Command (m for help): n
Partition type
p primary (0 primary, 0 extended, 4 free)
e extended (container for logical partitions)
Select (default p): p
Partition number (1-4, default 1):
First sector (2048-250069679, default 2048):
Last sector, +sectors or +sizeK,M,G,T,P (2048-250069679, default 250069679):

Created a new partition 1 of type 'Linux' and of size 119,2 GiB.


Command (m for help): p
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: dos
Disk identifier: 0xa4b57300

Device Boot Start End Sectors Size Id Type
/dev/sda1 2048 250069679 250067632 119,2G 83 Linux

Command (m for help): i
Selected partition 1
Device: /dev/sda1
Start: 2048
End: 250069679
Sectors: 250067632
Cylinders: 15566
Size: 119,2G
Id: 83
Type: Linux
Start-C/H/S: 0/32/33
End-C/H/S: 206/29/63


mkfs.ext4 /dev/sda1
mke2fs 1.43.4 (31-Jan-2017)
Ein Dateisystems mit 31258454 (4k) Blöcken und 7815168 Inodes wird erzeugt.
UUID des Dateisystems: fdce9286-4545-447c-9cca-7d67f5bb9f43
Superblock-Sicherungskopien gespeichert in den Blöcken:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000, 7962624, 11239424, 20480000, 23887872


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: dos
Disk identifier: 0xa4b57300

Device Boot Start End Sectors Size Id Type
/dev/sda1 2048 250069679 250067632 119,2G 83 Linux


And how can it be that the Sectors number is lower than the End value?




Command (m for help): i
Selected partition 1
Device: /dev/sda1
Start: 2048
End: 250069679
Sectors: 250067632
Cylinders: 15566
Size: 119,2G
Id: 83
Type: Linux
Start-C/H/S: 0/32/33
End-C/H/S: 206/29/63










share|improve this question






















  • Sectors is End minus Start. Usually for alignment, only Start matters.

    – frostschutz
    12 hours ago












  • have you considered using a higher level (therefore easier to use) tool, such as gparted?

    – ctrl-alt-delor
    10 hours ago











  • @ctrl-alt-delor normaly i use gparted, but this time i have no gui installed.

    – AlexOnLinux
    9 hours ago











  • Live OS (boot off of USB, use ssh -X and run it remotely, or parted.

    – ctrl-alt-delor
    6 hours ago

















6















I am wondering what Start and End value to choose when partitioning my ext. SSD using fdisk.



fdisk suggests 2048-250069679, default 2048 but 250069679 cannot be divided by 512 nor by 2048. Wouldn't it be better to set the Start and End value to a number that can be devided by 512 or 2048 or 4096?



For example: Start 4096 and End 250068992




Command (m for help): p

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: dos
Disk identifier: 0xa4b57300


Command (m for help): n
Partition type
p primary (0 primary, 0 extended, 4 free)
e extended (container for logical partitions)
Select (default p): p
Partition number (1-4, default 1):
First sector (2048-250069679, default 2048):
Last sector, +sectors or +sizeK,M,G,T,P (2048-250069679, default 250069679):

Created a new partition 1 of type 'Linux' and of size 119,2 GiB.


Command (m for help): p
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: dos
Disk identifier: 0xa4b57300

Device Boot Start End Sectors Size Id Type
/dev/sda1 2048 250069679 250067632 119,2G 83 Linux

Command (m for help): i
Selected partition 1
Device: /dev/sda1
Start: 2048
End: 250069679
Sectors: 250067632
Cylinders: 15566
Size: 119,2G
Id: 83
Type: Linux
Start-C/H/S: 0/32/33
End-C/H/S: 206/29/63


mkfs.ext4 /dev/sda1
mke2fs 1.43.4 (31-Jan-2017)
Ein Dateisystems mit 31258454 (4k) Blöcken und 7815168 Inodes wird erzeugt.
UUID des Dateisystems: fdce9286-4545-447c-9cca-7d67f5bb9f43
Superblock-Sicherungskopien gespeichert in den Blöcken:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000, 7962624, 11239424, 20480000, 23887872


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: dos
Disk identifier: 0xa4b57300

Device Boot Start End Sectors Size Id Type
/dev/sda1 2048 250069679 250067632 119,2G 83 Linux


And how can it be that the Sectors number is lower than the End value?




Command (m for help): i
Selected partition 1
Device: /dev/sda1
Start: 2048
End: 250069679
Sectors: 250067632
Cylinders: 15566
Size: 119,2G
Id: 83
Type: Linux
Start-C/H/S: 0/32/33
End-C/H/S: 206/29/63










share|improve this question






















  • Sectors is End minus Start. Usually for alignment, only Start matters.

    – frostschutz
    12 hours ago












  • have you considered using a higher level (therefore easier to use) tool, such as gparted?

    – ctrl-alt-delor
    10 hours ago











  • @ctrl-alt-delor normaly i use gparted, but this time i have no gui installed.

    – AlexOnLinux
    9 hours ago











  • Live OS (boot off of USB, use ssh -X and run it remotely, or parted.

    – ctrl-alt-delor
    6 hours ago













6












6








6








I am wondering what Start and End value to choose when partitioning my ext. SSD using fdisk.



fdisk suggests 2048-250069679, default 2048 but 250069679 cannot be divided by 512 nor by 2048. Wouldn't it be better to set the Start and End value to a number that can be devided by 512 or 2048 or 4096?



For example: Start 4096 and End 250068992




Command (m for help): p

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: dos
Disk identifier: 0xa4b57300


Command (m for help): n
Partition type
p primary (0 primary, 0 extended, 4 free)
e extended (container for logical partitions)
Select (default p): p
Partition number (1-4, default 1):
First sector (2048-250069679, default 2048):
Last sector, +sectors or +sizeK,M,G,T,P (2048-250069679, default 250069679):

Created a new partition 1 of type 'Linux' and of size 119,2 GiB.


Command (m for help): p
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: dos
Disk identifier: 0xa4b57300

Device Boot Start End Sectors Size Id Type
/dev/sda1 2048 250069679 250067632 119,2G 83 Linux

Command (m for help): i
Selected partition 1
Device: /dev/sda1
Start: 2048
End: 250069679
Sectors: 250067632
Cylinders: 15566
Size: 119,2G
Id: 83
Type: Linux
Start-C/H/S: 0/32/33
End-C/H/S: 206/29/63


mkfs.ext4 /dev/sda1
mke2fs 1.43.4 (31-Jan-2017)
Ein Dateisystems mit 31258454 (4k) Blöcken und 7815168 Inodes wird erzeugt.
UUID des Dateisystems: fdce9286-4545-447c-9cca-7d67f5bb9f43
Superblock-Sicherungskopien gespeichert in den Blöcken:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000, 7962624, 11239424, 20480000, 23887872


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: dos
Disk identifier: 0xa4b57300

Device Boot Start End Sectors Size Id Type
/dev/sda1 2048 250069679 250067632 119,2G 83 Linux


And how can it be that the Sectors number is lower than the End value?




Command (m for help): i
Selected partition 1
Device: /dev/sda1
Start: 2048
End: 250069679
Sectors: 250067632
Cylinders: 15566
Size: 119,2G
Id: 83
Type: Linux
Start-C/H/S: 0/32/33
End-C/H/S: 206/29/63










share|improve this question














I am wondering what Start and End value to choose when partitioning my ext. SSD using fdisk.



fdisk suggests 2048-250069679, default 2048 but 250069679 cannot be divided by 512 nor by 2048. Wouldn't it be better to set the Start and End value to a number that can be devided by 512 or 2048 or 4096?



For example: Start 4096 and End 250068992




Command (m for help): p

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: dos
Disk identifier: 0xa4b57300


Command (m for help): n
Partition type
p primary (0 primary, 0 extended, 4 free)
e extended (container for logical partitions)
Select (default p): p
Partition number (1-4, default 1):
First sector (2048-250069679, default 2048):
Last sector, +sectors or +sizeK,M,G,T,P (2048-250069679, default 250069679):

Created a new partition 1 of type 'Linux' and of size 119,2 GiB.


Command (m for help): p
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: dos
Disk identifier: 0xa4b57300

Device Boot Start End Sectors Size Id Type
/dev/sda1 2048 250069679 250067632 119,2G 83 Linux

Command (m for help): i
Selected partition 1
Device: /dev/sda1
Start: 2048
End: 250069679
Sectors: 250067632
Cylinders: 15566
Size: 119,2G
Id: 83
Type: Linux
Start-C/H/S: 0/32/33
End-C/H/S: 206/29/63


mkfs.ext4 /dev/sda1
mke2fs 1.43.4 (31-Jan-2017)
Ein Dateisystems mit 31258454 (4k) Blöcken und 7815168 Inodes wird erzeugt.
UUID des Dateisystems: fdce9286-4545-447c-9cca-7d67f5bb9f43
Superblock-Sicherungskopien gespeichert in den Blöcken:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000, 7962624, 11239424, 20480000, 23887872


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: dos
Disk identifier: 0xa4b57300

Device Boot Start End Sectors Size Id Type
/dev/sda1 2048 250069679 250067632 119,2G 83 Linux


And how can it be that the Sectors number is lower than the End value?




Command (m for help): i
Selected partition 1
Device: /dev/sda1
Start: 2048
End: 250069679
Sectors: 250067632
Cylinders: 15566
Size: 119,2G
Id: 83
Type: Linux
Start-C/H/S: 0/32/33
End-C/H/S: 206/29/63







hard-disk fdisk external-hdd mkfs






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked 12 hours ago









AlexOnLinuxAlexOnLinux

1686




1686












  • Sectors is End minus Start. Usually for alignment, only Start matters.

    – frostschutz
    12 hours ago












  • have you considered using a higher level (therefore easier to use) tool, such as gparted?

    – ctrl-alt-delor
    10 hours ago











  • @ctrl-alt-delor normaly i use gparted, but this time i have no gui installed.

    – AlexOnLinux
    9 hours ago











  • Live OS (boot off of USB, use ssh -X and run it remotely, or parted.

    – ctrl-alt-delor
    6 hours ago

















  • Sectors is End minus Start. Usually for alignment, only Start matters.

    – frostschutz
    12 hours ago












  • have you considered using a higher level (therefore easier to use) tool, such as gparted?

    – ctrl-alt-delor
    10 hours ago











  • @ctrl-alt-delor normaly i use gparted, but this time i have no gui installed.

    – AlexOnLinux
    9 hours ago











  • Live OS (boot off of USB, use ssh -X and run it remotely, or parted.

    – ctrl-alt-delor
    6 hours ago
















Sectors is End minus Start. Usually for alignment, only Start matters.

– frostschutz
12 hours ago






Sectors is End minus Start. Usually for alignment, only Start matters.

– frostschutz
12 hours ago














have you considered using a higher level (therefore easier to use) tool, such as gparted?

– ctrl-alt-delor
10 hours ago





have you considered using a higher level (therefore easier to use) tool, such as gparted?

– ctrl-alt-delor
10 hours ago













@ctrl-alt-delor normaly i use gparted, but this time i have no gui installed.

– AlexOnLinux
9 hours ago





@ctrl-alt-delor normaly i use gparted, but this time i have no gui installed.

– AlexOnLinux
9 hours ago













Live OS (boot off of USB, use ssh -X and run it remotely, or parted.

– ctrl-alt-delor
6 hours ago





Live OS (boot off of USB, use ssh -X and run it remotely, or parted.

– ctrl-alt-delor
6 hours ago










1 Answer
1






active

oldest

votes


















5














Alignment doesn’t matter for the end sector. Sectors are numbered from 0; fdisk is suggesting the last sector on your disk (which has 250069680 sectors).



 Start: 2048
End: 250069679
Sectors: 250067632


is correct, 250069679 minus 2048 plus one is 250067632: the partition contains 250067632 sectors, starting at offset 2048.






share|improve this answer

























  • i am wondering why the end-value is not important. do you know why perhaps?

    – AlexOnLinux
    9 hours ago











  • @AlexOnLinux your choices are either to use all the sectors available or not. If you want them all and the disk has a size which is not a multiple of 512/2048/4096 then the end will not be aligned.

    – icarus
    3 hours ago











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1 Answer
1






active

oldest

votes








1 Answer
1






active

oldest

votes









active

oldest

votes






active

oldest

votes









5














Alignment doesn’t matter for the end sector. Sectors are numbered from 0; fdisk is suggesting the last sector on your disk (which has 250069680 sectors).



 Start: 2048
End: 250069679
Sectors: 250067632


is correct, 250069679 minus 2048 plus one is 250067632: the partition contains 250067632 sectors, starting at offset 2048.






share|improve this answer

























  • i am wondering why the end-value is not important. do you know why perhaps?

    – AlexOnLinux
    9 hours ago











  • @AlexOnLinux your choices are either to use all the sectors available or not. If you want them all and the disk has a size which is not a multiple of 512/2048/4096 then the end will not be aligned.

    – icarus
    3 hours ago















5














Alignment doesn’t matter for the end sector. Sectors are numbered from 0; fdisk is suggesting the last sector on your disk (which has 250069680 sectors).



 Start: 2048
End: 250069679
Sectors: 250067632


is correct, 250069679 minus 2048 plus one is 250067632: the partition contains 250067632 sectors, starting at offset 2048.






share|improve this answer

























  • i am wondering why the end-value is not important. do you know why perhaps?

    – AlexOnLinux
    9 hours ago











  • @AlexOnLinux your choices are either to use all the sectors available or not. If you want them all and the disk has a size which is not a multiple of 512/2048/4096 then the end will not be aligned.

    – icarus
    3 hours ago













5












5








5







Alignment doesn’t matter for the end sector. Sectors are numbered from 0; fdisk is suggesting the last sector on your disk (which has 250069680 sectors).



 Start: 2048
End: 250069679
Sectors: 250067632


is correct, 250069679 minus 2048 plus one is 250067632: the partition contains 250067632 sectors, starting at offset 2048.






share|improve this answer















Alignment doesn’t matter for the end sector. Sectors are numbered from 0; fdisk is suggesting the last sector on your disk (which has 250069680 sectors).



 Start: 2048
End: 250069679
Sectors: 250067632


is correct, 250069679 minus 2048 plus one is 250067632: the partition contains 250067632 sectors, starting at offset 2048.







share|improve this answer














share|improve this answer



share|improve this answer








edited 11 hours ago

























answered 12 hours ago









Stephen KittStephen Kitt

180k25408487




180k25408487












  • i am wondering why the end-value is not important. do you know why perhaps?

    – AlexOnLinux
    9 hours ago











  • @AlexOnLinux your choices are either to use all the sectors available or not. If you want them all and the disk has a size which is not a multiple of 512/2048/4096 then the end will not be aligned.

    – icarus
    3 hours ago

















  • i am wondering why the end-value is not important. do you know why perhaps?

    – AlexOnLinux
    9 hours ago











  • @AlexOnLinux your choices are either to use all the sectors available or not. If you want them all and the disk has a size which is not a multiple of 512/2048/4096 then the end will not be aligned.

    – icarus
    3 hours ago
















i am wondering why the end-value is not important. do you know why perhaps?

– AlexOnLinux
9 hours ago





i am wondering why the end-value is not important. do you know why perhaps?

– AlexOnLinux
9 hours ago













@AlexOnLinux your choices are either to use all the sectors available or not. If you want them all and the disk has a size which is not a multiple of 512/2048/4096 then the end will not be aligned.

– icarus
3 hours ago





@AlexOnLinux your choices are either to use all the sectors available or not. If you want them all and the disk has a size which is not a multiple of 512/2048/4096 then the end will not be aligned.

– icarus
3 hours ago

















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