identify IA64 systems with HW controllers

[Rick Garland]

Hi all:

Have a need in which I would like to be able to easily identify those ia64 systems that have the HW RAID controller(s). What I have found so far is that systems with the controller have a device, /dev/sasd*.

Are there any other quick tests? The ioscan just takes too long in its return of data.

Thanks

[A. Clay Stephenson · Accepted solution]

An ioscan -k should be lightning quick as it doesn't actually scan the devices. The existence (or lack thereof) in /dev really shouldn't be considered definitive. Of course, an ioscan -k suffers from the same fault --- though less so. The ioscan -k will not know about newly connected devices. So your choice is correct and slow or possibly correct and fast.

[Sameer_Nirmal]

# ioscan -kfnd ciss

As Clay said already, the above command would look for the driver "ciss" in the current running kernel. The ciss driver is a part of "RAID-xx" product. Now assuming the product is installed but there is no actual hardware present in the server, there won't be any entry in the kernel IO structure and above command won't return nothing. So if this command shows a h/w entry for the RAID adapter that means h/w and its driver are installed.

The only different scenario would be there is a h/w adpater installed but no driver is installed. But then you have run ioscan to see an "Unknown" entry for the h/w adapter.

[Torsten.]

Hi Rick,

run

# ioscan -[k]fnd ciss

for SCSI RAID controllers, e.g.

ext_bus 4 0/2/1/0/4/0 ciss CLAIMED INTERFACE PCI-X SmartArray 6402 RAID Controller

and

# ioscan -[k]fnd sasd

for SAS controllers, e.g.

escsi_ctlr 0 0/4/1/0 sasd CLAIMED INTERFACE HP PCI
/PCI-X SAS MPT Adapter
/dev/sasd0

[Rick Garland]

Thanks folks!

Got the SAS controller.
Was hoping that there would be something more definitive. But if the box has been up for some time and gone through reboots then the SAS controller should be there in the ioscan -k.

Again, many thanks!