Add extra disk without rebooting

#1 · 23/04/2022, 2:40 pm

Problem

User wants to add extra disk to the Linux. But when running fdisk -l to list all the partitions the new device is not available

Solution

Run hardware scan to detect the new installed disk

echo “- – -” | tee /sys/class/scsi_host/host*/scan

or

for host in /sys/class/scsi_host/*; do echo “- – -” | sudo tee $host/scan; ls /dev/sd* ; done

When see a list of disk not initialized for example

Disk /dev/sdb: 85.9 GB, 85899345920 bytes, 167772160 sectors

you can mount it directlry

first run

fdisk /dev/sdb

create new partition

then format the disk

mkfs.xfs /dev/sdb1

then mount the disk

mount /dev/sdb1 /mnt

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#2 · 02/07/2022, 7:01 pm

another option

echo “- – -” >> /sys/class/scsi_host/host_$i/scan