What is the Linux drive naming scheme?












25















In Windows; you have the C: drive. This is the primary drive upon which Windows is installed.



However, Linux uses a different naming scheme: sda, sdb[1-4], etc. Can anyone give me a brief outline of it so I might actually understand it instead of being confused by it?






hard-drive







share|improve this question

























  • It's worth noting that in normal use you don't need to use the /dev/sd* names. The equivalent of your C: drive is / (aka the root directory). You can see all drives by going to 'Computer' in the file manager.

    – Thomas K
    Aug 18 '11 at 9:47






  • 1





    Also note, MS Windows has been trying to discard the notion of drive letters for 8 (?) years now. For Linux (and Ubuntu), I for one do not miss them.

    – david6
    Nov 21 '11 at 21:49
















25















In Windows; you have the C: drive. This is the primary drive upon which Windows is installed.



However, Linux uses a different naming scheme: sda, sdb[1-4], etc. Can anyone give me a brief outline of it so I might actually understand it instead of being confused by it?






hard-drive







share|improve this question

























  • It's worth noting that in normal use you don't need to use the /dev/sd* names. The equivalent of your C: drive is / (aka the root directory). You can see all drives by going to 'Computer' in the file manager.

    – Thomas K
    Aug 18 '11 at 9:47






  • 1





    Also note, MS Windows has been trying to discard the notion of drive letters for 8 (?) years now. For Linux (and Ubuntu), I for one do not miss them.

    – david6
    Nov 21 '11 at 21:49














25












25








25


9






In Windows; you have the C: drive. This is the primary drive upon which Windows is installed.



However, Linux uses a different naming scheme: sda, sdb[1-4], etc. Can anyone give me a brief outline of it so I might actually understand it instead of being confused by it?






hard-drive







share|improve this question
















In Windows; you have the C: drive. This is the primary drive upon which Windows is installed.



However, Linux uses a different naming scheme: sda, sdb[1-4], etc. Can anyone give me a brief outline of it so I might actually understand it instead of being confused by it?






hard-drive




hard-drive






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Jun 9 '14 at 15:46









Braiam

52.4k20138223




52.4k20138223










asked Aug 13 '11 at 11:38









Dante AshtonDante Ashton

2,500113347




2,500113347













  • It's worth noting that in normal use you don't need to use the /dev/sd* names. The equivalent of your C: drive is / (aka the root directory). You can see all drives by going to 'Computer' in the file manager.

    – Thomas K
    Aug 18 '11 at 9:47






  • 1





    Also note, MS Windows has been trying to discard the notion of drive letters for 8 (?) years now. For Linux (and Ubuntu), I for one do not miss them.

    – david6
    Nov 21 '11 at 21:49



















  • It's worth noting that in normal use you don't need to use the /dev/sd* names. The equivalent of your C: drive is / (aka the root directory). You can see all drives by going to 'Computer' in the file manager.

    – Thomas K
    Aug 18 '11 at 9:47






  • 1





    Also note, MS Windows has been trying to discard the notion of drive letters for 8 (?) years now. For Linux (and Ubuntu), I for one do not miss them.

    – david6
    Nov 21 '11 at 21:49

















It's worth noting that in normal use you don't need to use the /dev/sd* names. The equivalent of your C: drive is / (aka the root directory). You can see all drives by going to 'Computer' in the file manager.

– Thomas K
Aug 18 '11 at 9:47





It's worth noting that in normal use you don't need to use the /dev/sd* names. The equivalent of your C: drive is / (aka the root directory). You can see all drives by going to 'Computer' in the file manager.

– Thomas K
Aug 18 '11 at 9:47




1




1





Also note, MS Windows has been trying to discard the notion of drive letters for 8 (?) years now. For Linux (and Ubuntu), I for one do not miss them.

– david6
Nov 21 '11 at 21:49





Also note, MS Windows has been trying to discard the notion of drive letters for 8 (?) years now. For Linux (and Ubuntu), I for one do not miss them.

– david6
Nov 21 '11 at 21:49










5 Answers
5






active

oldest

votes


















32














In general, the letters (fd, sd, hd) refer to the device type ('SATA, SCSI/SATA, IDE'), the third letter is for the device order (a the first, b the second, etc) and the numbers refer to the partitions the device has, starting by zero.




  • hd refers to an IDE-type drive

  • sd refers to a SCSI drive in general, but is mostly popular for SATA drives and CD/DVD

  • fd is floppy disk


So for example:




  • the first (1) partition on your first (a) SATA drive is /dev/sda1

  • The third (3) partition on your second (b) SATA drive is /dev/sdb3

  • the second partition (2) of the second (b) IDE hard disk is '/dev/hdb2'


This device naming is more of a background one, as the actual point to access it a directory mount point.



I think that the following three articles will help you a bit:




  • Ubuntu install-guide: Device Names in Linux

  • http://tldp.org/HOWTO/html_single/Partition/

  • Ubuntu install-guide: Linux Devices






share|improve this answer





















  • 6





    additionally, most modern distros allow referencing drives by uuid (a unique identifier for drives and other storage devices) if the kernel supports it there will be symlinks in /dev/disk/by-uuid/ that point to the "standard" /dev/sd** device nodes. This gives the benefit of having a stable reference to a drive even if you shuffle drives around on the system.

    – crasic
    Aug 15 '11 at 21:07





















10














Just for clarity, on the Windows side you're confusing the file system naming with the drive naming. Windows hides the drive naming from you almost completely, but you can see examples in the registry and if you edit your boot.ini file. A disk reference there might look like this: 



multi(0)disk(0)rdisk(0)partition(1)


You can also see individual disks in the disk manager tool. The reason I bring this up is that the ntfs file system allows you to play all kinds of games. You can mount a separate disk to a folder in your C: and another drive at the same time, and unmounted disks may not have a drive letter at all. So don't confuse the file system from disk naming.



Linux is similar, here. sda1 is a common partition name, but it could be mounted anywhere on the file system.






share|improve this answer

































    5














    While SCSI and SATA will continue to be around for some time in mainstream desktop and laptop configurations, mobile devices using eMMC storage in the /dev/mmcblk*p* naming scheme have been around a few years and non-SATA high performance NVMe SSDs (/dev/nvme*n*) are not far away.






    share|improve this answer
























    • This is would be better as an edit to the accepted answer.

      – muru
      Feb 15 '15 at 16:31











    • @muru I voted for all the (currently) non-zero answers, I could have easily left that comment on each of them.

      – LiveWireBT
      Feb 15 '15 at 16:38








    • 1





      I can't seem to find a standard for naming devices like eMMC and NVMe. It seems that if the disk name ends in a number then you insert a 'p' before the partition number, but it would be nice to have this confirmed!

      – lane
      Dec 22 '16 at 8:28





















    4














    Pavlos G. is mostly correct, however /dev/hd** is no longer in use by IDE harddisks (and CD drives), they have been using /dev/sd** since kernel 2.6.19 (and ubuntu since 7.10, ~2007)






    share|improve this answer































      2














      You really shouldn't rely on the sd* naming scheme. It can change dramatically depending on drive spin up, hot plugging, and additional storage adapters. Best thing to use to uniquely address your device is the persistent links like /dev/disk/by-id/. Linux doesn't have the "boot from first disk" limitations and can also mount drives by label so drive ordering is really irrelevant.






      share|improve this answer























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        5 Answers
        5






        active

        oldest

        votes








        5 Answers
        5






        active

        oldest

        votes









        active

        oldest

        votes






        active

        oldest

        votes









        32














        In general, the letters (fd, sd, hd) refer to the device type ('SATA, SCSI/SATA, IDE'), the third letter is for the device order (a the first, b the second, etc) and the numbers refer to the partitions the device has, starting by zero.




        • hd refers to an IDE-type drive

        • sd refers to a SCSI drive in general, but is mostly popular for SATA drives and CD/DVD

        • fd is floppy disk


        So for example:




        • the first (1) partition on your first (a) SATA drive is /dev/sda1

        • The third (3) partition on your second (b) SATA drive is /dev/sdb3

        • the second partition (2) of the second (b) IDE hard disk is '/dev/hdb2'


        This device naming is more of a background one, as the actual point to access it a directory mount point.



        I think that the following three articles will help you a bit:




        • Ubuntu install-guide: Device Names in Linux

        • http://tldp.org/HOWTO/html_single/Partition/

        • Ubuntu install-guide: Linux Devices






        share|improve this answer





















        • 6





          additionally, most modern distros allow referencing drives by uuid (a unique identifier for drives and other storage devices) if the kernel supports it there will be symlinks in /dev/disk/by-uuid/ that point to the "standard" /dev/sd** device nodes. This gives the benefit of having a stable reference to a drive even if you shuffle drives around on the system.

          – crasic
          Aug 15 '11 at 21:07


















        32














        In general, the letters (fd, sd, hd) refer to the device type ('SATA, SCSI/SATA, IDE'), the third letter is for the device order (a the first, b the second, etc) and the numbers refer to the partitions the device has, starting by zero.




        • hd refers to an IDE-type drive

        • sd refers to a SCSI drive in general, but is mostly popular for SATA drives and CD/DVD

        • fd is floppy disk


        So for example:




        • the first (1) partition on your first (a) SATA drive is /dev/sda1

        • The third (3) partition on your second (b) SATA drive is /dev/sdb3

        • the second partition (2) of the second (b) IDE hard disk is '/dev/hdb2'


        This device naming is more of a background one, as the actual point to access it a directory mount point.



        I think that the following three articles will help you a bit:




        • Ubuntu install-guide: Device Names in Linux

        • http://tldp.org/HOWTO/html_single/Partition/

        • Ubuntu install-guide: Linux Devices






        share|improve this answer





















        • 6





          additionally, most modern distros allow referencing drives by uuid (a unique identifier for drives and other storage devices) if the kernel supports it there will be symlinks in /dev/disk/by-uuid/ that point to the "standard" /dev/sd** device nodes. This gives the benefit of having a stable reference to a drive even if you shuffle drives around on the system.

          – crasic
          Aug 15 '11 at 21:07
















        32












        32








        32







        In general, the letters (fd, sd, hd) refer to the device type ('SATA, SCSI/SATA, IDE'), the third letter is for the device order (a the first, b the second, etc) and the numbers refer to the partitions the device has, starting by zero.




        • hd refers to an IDE-type drive

        • sd refers to a SCSI drive in general, but is mostly popular for SATA drives and CD/DVD

        • fd is floppy disk


        So for example:




        • the first (1) partition on your first (a) SATA drive is /dev/sda1

        • The third (3) partition on your second (b) SATA drive is /dev/sdb3

        • the second partition (2) of the second (b) IDE hard disk is '/dev/hdb2'


        This device naming is more of a background one, as the actual point to access it a directory mount point.



        I think that the following three articles will help you a bit:




        • Ubuntu install-guide: Device Names in Linux

        • http://tldp.org/HOWTO/html_single/Partition/

        • Ubuntu install-guide: Linux Devices






        share|improve this answer















        In general, the letters (fd, sd, hd) refer to the device type ('SATA, SCSI/SATA, IDE'), the third letter is for the device order (a the first, b the second, etc) and the numbers refer to the partitions the device has, starting by zero.




        • hd refers to an IDE-type drive

        • sd refers to a SCSI drive in general, but is mostly popular for SATA drives and CD/DVD

        • fd is floppy disk


        So for example:




        • the first (1) partition on your first (a) SATA drive is /dev/sda1

        • The third (3) partition on your second (b) SATA drive is /dev/sdb3

        • the second partition (2) of the second (b) IDE hard disk is '/dev/hdb2'


        This device naming is more of a background one, as the actual point to access it a directory mount point.



        I think that the following three articles will help you a bit:




        • Ubuntu install-guide: Device Names in Linux

        • http://tldp.org/HOWTO/html_single/Partition/

        • Ubuntu install-guide: Linux Devices







        share|improve this answer














        share|improve this answer



        share|improve this answer








        edited Jan 13 '17 at 10:07









        David Foerster

        28.5k1367113




        28.5k1367113










        answered Aug 13 '11 at 11:41









        Pavlos G.Pavlos G.

        7,37612733




        7,37612733








        • 6





          additionally, most modern distros allow referencing drives by uuid (a unique identifier for drives and other storage devices) if the kernel supports it there will be symlinks in /dev/disk/by-uuid/ that point to the "standard" /dev/sd** device nodes. This gives the benefit of having a stable reference to a drive even if you shuffle drives around on the system.

          – crasic
          Aug 15 '11 at 21:07
















        • 6





          additionally, most modern distros allow referencing drives by uuid (a unique identifier for drives and other storage devices) if the kernel supports it there will be symlinks in /dev/disk/by-uuid/ that point to the "standard" /dev/sd** device nodes. This gives the benefit of having a stable reference to a drive even if you shuffle drives around on the system.

          – crasic
          Aug 15 '11 at 21:07










        6




        6





        additionally, most modern distros allow referencing drives by uuid (a unique identifier for drives and other storage devices) if the kernel supports it there will be symlinks in /dev/disk/by-uuid/ that point to the "standard" /dev/sd** device nodes. This gives the benefit of having a stable reference to a drive even if you shuffle drives around on the system.

        – crasic
        Aug 15 '11 at 21:07







        additionally, most modern distros allow referencing drives by uuid (a unique identifier for drives and other storage devices) if the kernel supports it there will be symlinks in /dev/disk/by-uuid/ that point to the "standard" /dev/sd** device nodes. This gives the benefit of having a stable reference to a drive even if you shuffle drives around on the system.

        – crasic
        Aug 15 '11 at 21:07















        10














        Just for clarity, on the Windows side you're confusing the file system naming with the drive naming. Windows hides the drive naming from you almost completely, but you can see examples in the registry and if you edit your boot.ini file. A disk reference there might look like this: 



        multi(0)disk(0)rdisk(0)partition(1)


        You can also see individual disks in the disk manager tool. The reason I bring this up is that the ntfs file system allows you to play all kinds of games. You can mount a separate disk to a folder in your C: and another drive at the same time, and unmounted disks may not have a drive letter at all. So don't confuse the file system from disk naming.



        Linux is similar, here. sda1 is a common partition name, but it could be mounted anywhere on the file system.






        share|improve this answer






























          10














          Just for clarity, on the Windows side you're confusing the file system naming with the drive naming. Windows hides the drive naming from you almost completely, but you can see examples in the registry and if you edit your boot.ini file. A disk reference there might look like this: 



          multi(0)disk(0)rdisk(0)partition(1)


          You can also see individual disks in the disk manager tool. The reason I bring this up is that the ntfs file system allows you to play all kinds of games. You can mount a separate disk to a folder in your C: and another drive at the same time, and unmounted disks may not have a drive letter at all. So don't confuse the file system from disk naming.



          Linux is similar, here. sda1 is a common partition name, but it could be mounted anywhere on the file system.






          share|improve this answer




























            10












            10








            10







            Just for clarity, on the Windows side you're confusing the file system naming with the drive naming. Windows hides the drive naming from you almost completely, but you can see examples in the registry and if you edit your boot.ini file. A disk reference there might look like this: 



            multi(0)disk(0)rdisk(0)partition(1)


            You can also see individual disks in the disk manager tool. The reason I bring this up is that the ntfs file system allows you to play all kinds of games. You can mount a separate disk to a folder in your C: and another drive at the same time, and unmounted disks may not have a drive letter at all. So don't confuse the file system from disk naming.



            Linux is similar, here. sda1 is a common partition name, but it could be mounted anywhere on the file system.






            share|improve this answer















            Just for clarity, on the Windows side you're confusing the file system naming with the drive naming. Windows hides the drive naming from you almost completely, but you can see examples in the registry and if you edit your boot.ini file. A disk reference there might look like this: 



            multi(0)disk(0)rdisk(0)partition(1)


            You can also see individual disks in the disk manager tool. The reason I bring this up is that the ntfs file system allows you to play all kinds of games. You can mount a separate disk to a folder in your C: and another drive at the same time, and unmounted disks may not have a drive letter at all. So don't confuse the file system from disk naming.



            Linux is similar, here. sda1 is a common partition name, but it could be mounted anywhere on the file system.







            share|improve this answer














            share|improve this answer



            share|improve this answer








            edited Aug 16 '11 at 16:49

























            answered Aug 13 '11 at 17:21









            Joel CoehoornJoel Coehoorn

            21115




            21115























                5














                While SCSI and SATA will continue to be around for some time in mainstream desktop and laptop configurations, mobile devices using eMMC storage in the /dev/mmcblk*p* naming scheme have been around a few years and non-SATA high performance NVMe SSDs (/dev/nvme*n*) are not far away.






                share|improve this answer
























                • This is would be better as an edit to the accepted answer.

                  – muru
                  Feb 15 '15 at 16:31











                • @muru I voted for all the (currently) non-zero answers, I could have easily left that comment on each of them.

                  – LiveWireBT
                  Feb 15 '15 at 16:38








                • 1





                  I can't seem to find a standard for naming devices like eMMC and NVMe. It seems that if the disk name ends in a number then you insert a 'p' before the partition number, but it would be nice to have this confirmed!

                  – lane
                  Dec 22 '16 at 8:28


















                5














                While SCSI and SATA will continue to be around for some time in mainstream desktop and laptop configurations, mobile devices using eMMC storage in the /dev/mmcblk*p* naming scheme have been around a few years and non-SATA high performance NVMe SSDs (/dev/nvme*n*) are not far away.






                share|improve this answer
























                • This is would be better as an edit to the accepted answer.

                  – muru
                  Feb 15 '15 at 16:31











                • @muru I voted for all the (currently) non-zero answers, I could have easily left that comment on each of them.

                  – LiveWireBT
                  Feb 15 '15 at 16:38








                • 1





                  I can't seem to find a standard for naming devices like eMMC and NVMe. It seems that if the disk name ends in a number then you insert a 'p' before the partition number, but it would be nice to have this confirmed!

                  – lane
                  Dec 22 '16 at 8:28
















                5












                5








                5







                While SCSI and SATA will continue to be around for some time in mainstream desktop and laptop configurations, mobile devices using eMMC storage in the /dev/mmcblk*p* naming scheme have been around a few years and non-SATA high performance NVMe SSDs (/dev/nvme*n*) are not far away.






                share|improve this answer













                While SCSI and SATA will continue to be around for some time in mainstream desktop and laptop configurations, mobile devices using eMMC storage in the /dev/mmcblk*p* naming scheme have been around a few years and non-SATA high performance NVMe SSDs (/dev/nvme*n*) are not far away.







                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered Feb 15 '15 at 16:12









                LiveWireBTLiveWireBT

                21.8k1972156




                21.8k1972156













                • This is would be better as an edit to the accepted answer.

                  – muru
                  Feb 15 '15 at 16:31











                • @muru I voted for all the (currently) non-zero answers, I could have easily left that comment on each of them.

                  – LiveWireBT
                  Feb 15 '15 at 16:38








                • 1





                  I can't seem to find a standard for naming devices like eMMC and NVMe. It seems that if the disk name ends in a number then you insert a 'p' before the partition number, but it would be nice to have this confirmed!

                  – lane
                  Dec 22 '16 at 8:28





















                • This is would be better as an edit to the accepted answer.

                  – muru
                  Feb 15 '15 at 16:31











                • @muru I voted for all the (currently) non-zero answers, I could have easily left that comment on each of them.

                  – LiveWireBT
                  Feb 15 '15 at 16:38








                • 1





                  I can't seem to find a standard for naming devices like eMMC and NVMe. It seems that if the disk name ends in a number then you insert a 'p' before the partition number, but it would be nice to have this confirmed!

                  – lane
                  Dec 22 '16 at 8:28



















                This is would be better as an edit to the accepted answer.

                – muru
                Feb 15 '15 at 16:31





                This is would be better as an edit to the accepted answer.

                – muru
                Feb 15 '15 at 16:31













                @muru I voted for all the (currently) non-zero answers, I could have easily left that comment on each of them.

                – LiveWireBT
                Feb 15 '15 at 16:38







                @muru I voted for all the (currently) non-zero answers, I could have easily left that comment on each of them.

                – LiveWireBT
                Feb 15 '15 at 16:38






                1




                1





                I can't seem to find a standard for naming devices like eMMC and NVMe. It seems that if the disk name ends in a number then you insert a 'p' before the partition number, but it would be nice to have this confirmed!

                – lane
                Dec 22 '16 at 8:28







                I can't seem to find a standard for naming devices like eMMC and NVMe. It seems that if the disk name ends in a number then you insert a 'p' before the partition number, but it would be nice to have this confirmed!

                – lane
                Dec 22 '16 at 8:28













                4














                Pavlos G. is mostly correct, however /dev/hd** is no longer in use by IDE harddisks (and CD drives), they have been using /dev/sd** since kernel 2.6.19 (and ubuntu since 7.10, ~2007)






                share|improve this answer




























                  4














                  Pavlos G. is mostly correct, however /dev/hd** is no longer in use by IDE harddisks (and CD drives), they have been using /dev/sd** since kernel 2.6.19 (and ubuntu since 7.10, ~2007)






                  share|improve this answer


























                    4












                    4








                    4







                    Pavlos G. is mostly correct, however /dev/hd** is no longer in use by IDE harddisks (and CD drives), they have been using /dev/sd** since kernel 2.6.19 (and ubuntu since 7.10, ~2007)






                    share|improve this answer













                    Pavlos G. is mostly correct, however /dev/hd** is no longer in use by IDE harddisks (and CD drives), they have been using /dev/sd** since kernel 2.6.19 (and ubuntu since 7.10, ~2007)







                    share|improve this answer












                    share|improve this answer



                    share|improve this answer










                    answered Aug 18 '11 at 0:54









                    mikerumikeru

                    1394




                    1394























                        2














                        You really shouldn't rely on the sd* naming scheme. It can change dramatically depending on drive spin up, hot plugging, and additional storage adapters. Best thing to use to uniquely address your device is the persistent links like /dev/disk/by-id/. Linux doesn't have the "boot from first disk" limitations and can also mount drives by label so drive ordering is really irrelevant.






                        share|improve this answer




























                          2














                          You really shouldn't rely on the sd* naming scheme. It can change dramatically depending on drive spin up, hot plugging, and additional storage adapters. Best thing to use to uniquely address your device is the persistent links like /dev/disk/by-id/. Linux doesn't have the "boot from first disk" limitations and can also mount drives by label so drive ordering is really irrelevant.






                          share|improve this answer


























                            2












                            2








                            2







                            You really shouldn't rely on the sd* naming scheme. It can change dramatically depending on drive spin up, hot plugging, and additional storage adapters. Best thing to use to uniquely address your device is the persistent links like /dev/disk/by-id/. Linux doesn't have the "boot from first disk" limitations and can also mount drives by label so drive ordering is really irrelevant.






                            share|improve this answer













                            You really shouldn't rely on the sd* naming scheme. It can change dramatically depending on drive spin up, hot plugging, and additional storage adapters. Best thing to use to uniquely address your device is the persistent links like /dev/disk/by-id/. Linux doesn't have the "boot from first disk" limitations and can also mount drives by label so drive ordering is really irrelevant.







                            share|improve this answer












                            share|improve this answer



                            share|improve this answer










                            answered Nov 21 '11 at 17:18









                            ppetrakippetraki

                            4,8601750




                            4,8601750






























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