SDcard /dev/sdb2 is apparently in use by the system; will not make a filesystem here

Posted by user171223 on Super User See other posts from Super User or by user171223
Published on 2013-11-12T02:47:37Z Indexed on 2013/11/12 3:59 UTC
Read the original article Hit count: 138

Filed under:

linux

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partitioning

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sd-card

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software-raid

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hardware-raid

I divided my sdcard into 2 partitions, but It got an error and couldn't create a new partition.

Error:
/dev/sdb2 is apparently in use by the system; will not make a filesystem here!

My /dev/sdb was not mounted, and the output of command lsblk was:

cxphong@cxphong:~/Desktop$ lsblk

NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sr0 11:0 1 1024M 0 rom
sda 8:0 0 465.8G 0 disk
+-sda1 8:1 0 118.8G 0 part
+-sda2 8:2 0 147.7G 0 part /media/DATA
+-sda3 8:3 0 137.1G 0 part
+-sda4 8:4 0 1K 0 part
+-sda5 8:5 0 1023M 0 part [SWAP]
+-sda6 8:6 0 61.2G 0 part /
sdb 8:16 1 3.7G 0 disk
+-sdb1 8:17 1 70.6M 0 part
+-sdb2 8:18 1 3.6G 0 part
+-sdb1 (dm-0) 252:0 0 70.6M 0 part
+-sdb2 (dm-1) 252:1 0 3.6G 0 part

I couldn't delete /dev/sdb1 (dm-0) & /dev/sdb2 (dm-1). What are they?

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