Linux Rescan HP Smart Array For New Disks

last updated in Categories , , , , , , , , , , ,

How do I rescan an HP Smart Array for new disks without rebooting in CentOS or Debian or RHEL server?

HP Smart Array uses CCISS driver which is part of Linux kernel itself.

Hot plugging of SCSI tape and disk drives is supported. The cciss driver must be informed that changes to the SCSI bus have been made. This may be done via the /proc filesystem.

Rescan HP Smart Array

Type the following command:
echo "rescan" > /proc/driver/cciss/cciss0
To add an individual device with:
echo scsi add-single-device C B T L > /proc/scsi/scsi

Replace C B T L with actual values:
Where,

  1. C controller
  2. B bus
  3. T target
  4. L lun

For example to add a device on controller 3, bus 2, target 1, lun 0, enter:
echo "scsi add-single-device 3 2 1 0" > /proc/scsi/scsi

Posted by: Vivek Gite

The author is the creator of nixCraft and a seasoned sysadmin, DevOps engineer, and a trainer for the Linux operating system/Unix shell scripting. Get the latest tutorials on SysAdmin, Linux/Unix and open source topics via RSS/XML feed or weekly email newsletter.