![]() ![]() I came to this SU question trying to find out "What are these dm-X" devices, and it lead me to believe I somehow had slipped on a banana peel and ended up with an LVM setup that I never intentially created.Īfter I verified there was no actual LVM in use because the outputs of pvs lvs pvsetup and lvsetup all returned absolutely nothing, I just used the dmsetup command to remove the device mappings like dmsetup remove /dev/dm-0Īfter this the problems it was causing were resolved, and I could use my devices normally. More directly, they are part of the "device mapper" system which is used by LVM but, for example, in my case some kind of strange happening from osprobe and/or update-grub created them.ĭm-X devices showed up in my /dev/ folder and were causing problems since the devices they pointed to were raid members and when the raid was assembled through them it was read only. Since the title of the question is still "What is this dm-0 device", it should be mentioned atleast once that dm-X (dm-0, etc) are not always LVM related. ![]() Setup Type: Offline Installer / Full Standalone Setup. Software Full Name: DMDE (Disk Editor and Data Recovery) 2.10.0. ![]() └─RATGORA1DSY_PJSTORE_1p1 (dm-5) 253:5 0 300G 0 part /oradata DM Disk Editor and Data Recovery Technical Setup Details. └─RATGORA1DSY_PJSTORE_1 (dm-4) 253:4 0 300G 0 mpath Download Disk Manager - Best Software & Apps Aomei Dynamic Disk Manager Toolwiz Care Cleaner One Pro Paragon Hard Disk Manager Cute Partition Manager. If you have this type of hard disk, please select Send test report to developer option from the Report menu. statistics and more information for this type of hard disk will be available soon. If you've been given a non root user, I advise you to use lsblk command ( list block devices) which will build a tree view of disks dependencies: ~]$ lsblk Hard Disk Sentinel - Technical details for disk SEAGATE ST500DM005 Hard Disk Drive / SSD / Storage Device Technical Details S.M.A.R.T. As usual under a Linux system, there should be many ways to get the same result. ![]()
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