topic How to detect newly added storage device without reboot in Operating System - Linux

How to detect newly added storage device without reboot

sreekanthtm — Tue, 13 Nov 2007 04:44:08 GMT

I have one rx5670 server running RHEL 5.1.
I presented 5 luns from SAN (XP, EVA), but it is not visible from the host. What are the commands to be exicuted from host, so that it can detect the luns without reboot.

Rgds
Sreekanth

Re: How to detect newly added storage device without reboot

joseph pareti — Tue, 13 Nov 2007 04:49:01 GMT

have you done a rescan? i don't know on integrity, but on proliant there are "fibre tools", such as hp_rescan -a

Re: How to detect newly added storage device without reboot

weisstik — Tue, 13 Nov 2007 07:43:04 GMT

What kind of HBAs do you use or what driver module?

Re: How to detect newly added storage device without reboot

Hemmetter — Tue, 13 Nov 2007 08:01:18 GMT

Hi,

first identify you HBA by command
$lspci
compare to
$ls -ld /sys/class/scsi_host/host?/device

find the correct .../host?/
then
$ echo "- - - " > /sys/class/scsi_host/hostX/scan

finally check dmesg-output for new devices.

rgds
HGH

Re: How to detect newly added storage device without reboot

Steven E. Protter — Tue, 13 Nov 2007 09:48:25 GMT

Shalom,

All things being equal hprescan from PSP should be able to detect the new storage without reboot.

In practice this may be effected by settings in /etc/modprobe.conf and the initrd ramdisk image.

I've had problems with this when using Emulex cards.

SEP