topic rescan /dev/cciss without reboot the server - help please! in Disk Enclosures

rescan /dev/cciss without reboot the server - help please!

BiancaP. — Thu, 19 Jun 2008 12:43:14 GMT

I need to you know how to rescan /dev/cciss without reboot the server.
Example: if you create a new logical disc in the Storage, it will not appear in /dev until you did a reboot.
Maybe there is a way to do this... because is not good reboot the server all the time i create a new VM.

Any help, please???

Re: rescan /dev/cciss without reboot the server - help please!

Torsten. — Thu, 19 Jun 2008 13:03:13 GMT

I'll use some mystic power to guess about your OS ... hmm, must be a flavour of linux.

Use "hp_rescan".

Re: rescan /dev/cciss without reboot the server - help please!

BiancaP. — Thu, 19 Jun 2008 13:09:08 GMT

Yes, my SO is Linyx - Red Hat:

Linux lab1 2.6.9-67.ELsmp #1 SMP Thu Apr 17 08:47:35 BRT 2008 i686 i686 i386 GNU/Linux

and I have a two HP DL380 servers and one HP MSA500 storage with 10 disks of 146GB.

But this command (hp_rescan) don't exist... =/

Re: rescan /dev/cciss without reboot the server - help please!

Heironimus — Fri, 20 Jun 2008 16:29:10 GMT

If memory serves, hp_rescan is actually a part of the fibreutils package and is used to rescan HP-branded HBAs for new SAN LUNs, not for cciss devices.

If you use the ACU to create a new drive it should rescan everything for you. Do you get any errors in dmesg or logs?

Re: rescan /dev/cciss without reboot the server - help please!

Torsten. — Fri, 20 Jun 2008 17:40:27 GMT

Heironimus you are right. hp_rescan is for SAN, cciss is RAID (smartarray). I didn't work with linux since years, sorry.

Google found this (I don't know if this works, but it sounds good ;-))

echo "rescan" > /proc/scsi/cciss0/1

Re: rescan /dev/cciss without reboot the server - help please!

Dana MacPhail — Mon, 29 Dec 2008 20:04:40 GMT

The echo "rescan" >> /proc/scsi/scsi won't work in this case since the system doesn't treat these as scsi devices, only cciss devices. Doing the same rescan >> /proc/cciss/cciss0 also does nothing. Did anyone ever find a way to do this without a reboot?