Scanning for new disks attached using virtio?

Posted by larsks on Server Fault See other posts from Server Fault or by larsks
Published on 2012-12-17T16:57:55Z Indexed on 2012/12/17 17:04 UTC
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Filed under:

kvm-virtualization

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block-device

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virtio

I can successfully attach disks to a running KVM instance using virsh attach-disk...

virsh attach-disk node-1 /dev/vg_lunsr/lun1  vdb
Disk attached successfully

...but these new devices aren't seen by the guest without a reboot, which almost defeats the purpose of dynamic attachment. If these were SCSI devices I would use e.g. /sys/class/scsi_host/host0/scan to request the SCSI drivers to scan for new devices. Is there an equivalent capability for the virtio block driver?

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